1
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Kunstelj Š, Darù A, Sauza-de la Vega A, Stroscio GD, Edwards E, Papadopoulos R, Gagliardi L, Wuttig A. Competitive Valerate Binding Enables RuO 2-Mediated Butene Electrosynthesis in Water. J Am Chem Soc 2024. [PMID: 39018109 DOI: 10.1021/jacs.4c01776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/19/2024]
Abstract
The (non)-Kolbe oxidation of valeric acid, sourced from a hydrolysis product of cellulose, provides a sustainable synthetic route to access value-added products, such as butene. An essential mechanistic step preceding product formation involves the oxidative and decarboxylative cleavage of a C-C bond. Yet, the role of the electrode surface in mediating this oxidative step remains an open question: the electron transfer can occur either via an inner-sphere or outer-sphere mechanism. Here, we report the electrochemical, in situ spectroscopic, computational, and reactivity studies of RuO2-mediated oxidative decarboxylation of valeric acid to butene in aqueous electrolytes. We find that carboxylates bind to RuO2 anode surfaces at potential values where decarboxylation products are observed. Our results are consistent with a reaction scheme where the competitive and catalytic oxygen evolution reaction (OER) is impeded by these bound carboxylate species while these species are inert toward butene formation. Our results implicate an outer-sphere electron transfer mechanism for decarboxylation where the surface chemistry of the RuO2 electrode serves to enable higher non-Kolbe reaction selectivity by suppressing the parasitic OER. Our findings delineate interfacial design principles for selective electrochemical systems that utilize water as the ultimate oxidant for sustainable decarboxylation.
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Affiliation(s)
- Špela Kunstelj
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Andrea Darù
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | | | - Gautam D Stroscio
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Emma Edwards
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Ry Papadopoulos
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Laura Gagliardi
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Anna Wuttig
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
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2
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Ram R, Xia L, Benzidi H, Guha A, Golovanova V, Garzón Manjón A, Llorens Rauret D, Sanz Berman P, Dimitropoulos M, Mundet B, Pastor E, Celorrio V, Mesa CA, Das AM, Pinilla-Sánchez A, Giménez S, Arbiol J, López N, García de Arquer FP. Water-hydroxide trapping in cobalt tungstate for proton exchange membrane water electrolysis. Science 2024; 384:1373-1380. [PMID: 38900890 DOI: 10.1126/science.adk9849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 05/13/2024] [Indexed: 06/22/2024]
Abstract
The oxygen evolution reaction is the bottleneck to energy-efficient water-based electrolysis for the production of hydrogen and other solar fuels. In proton exchange membrane water electrolysis (PEMWE), precious metals have generally been necessary for the stable catalysis of this reaction. In this work, we report that delamination of cobalt tungstate enables high activity and durability through the stabilization of oxide and water-hydroxide networks of the lattice defects in acid. The resulting catalysts achieve lower overpotentials, a current density of 1.8 amperes per square centimeter at 2 volts, and stable operation up to 1 ampere per square centimeter in a PEMWE system at industrial conditions (80°C) at 1.77 volts; a threefold improvement in activity; and stable operation at 1 ampere per square centimeter over the course of 600 hours.
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Affiliation(s)
- Ranit Ram
- ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Lu Xia
- ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Hind Benzidi
- ICIQ-CERCA - Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
| | - Anku Guha
- ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Viktoria Golovanova
- ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Alba Garzón Manjón
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain
| | - David Llorens Rauret
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain
| | - Pol Sanz Berman
- ICIQ-CERCA - Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
| | - Marinos Dimitropoulos
- ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Bernat Mundet
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain
| | - Ernest Pastor
- CNRS, Université de Rennes, IPR (Institut de Physique de Rennes) - UMR 6251, Rennes, France
- CNRS, Université de Rennes, DYNACOM (Dynamical Control of Materials Laboratory) - IRL2015, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan
| | - Veronica Celorrio
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
| | - Camilo A Mesa
- Institute of Advanced Materials (INAM), Universitat Jaume I, 12006 Castelló, Spain
| | - Aparna M Das
- ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Adrián Pinilla-Sánchez
- ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Sixto Giménez
- Institute of Advanced Materials (INAM), Universitat Jaume I, 12006 Castelló, Spain
| | - Jordi Arbiol
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - Núria López
- ICIQ-CERCA - Institute of Chemical Research of Catalonia, The Barcelona Institute of Science and Technology, 43007 Tarragona, Spain
| | - F Pelayo García de Arquer
- ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
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3
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Wu P, Ma Z, Xia X, Song B, Zhong J, Yu Y, Huang Y. Precise Engineering of the Electrocatalytic Activity of FeN 4-Embedded Graphene on Oxygen Electrode Reactions by Attaching Electrides. J Phys Chem Lett 2024; 15:1121-1129. [PMID: 38263631 DOI: 10.1021/acs.jpclett.3c03358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Using first-principles calculations combined with a constant-potential implicit solvent model, we comprehensively studied the activity of oxygen electrode reactions catalyzed by electride-supported FeN4-embedded graphene (FeN4Cx). The physical quantities in FeN4Cx/electrides, i.e., work function of electrides, interlayer spacing, stability of heterostructures, charge transferred to Fe, d-band center of Fe, and adsorption free energy of O, are highly intercorrelated, resulting in activity being fully expressed by the nature of the electrides themselves, thereby achieving a precise modulation in activity by selecting different electrides. Strikingly, the FeN4PDCx/Ca2N and FeN4PDCx/Y2C systems maintain a high oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) activity with the overpotential less than 0.46 and 0.62 V in a wide pH range. This work provides an effective strategy for the rational design of efficient bifunctional catalysts as well as a model system with a simple activity-descriptor, helping to realize significant advances in energy devices.
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Affiliation(s)
- Peng Wu
- College of Chemistry and Material Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu 241000, China
| | - Zengying Ma
- College of Chemistry and Material Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu 241000, China
| | - Xueqian Xia
- College of Chemistry and Material Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu 241000, China
| | - Bowen Song
- College of Chemistry and Material Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu 241000, China
| | - Junwen Zhong
- Anhui Key Laboratory of Molecule-Based Materials, Anhui Carbon Neutrality Engineering Center, Anhui Normal University, Wuhu 241000, China
| | - Yanghong Yu
- Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory of New-Energy Vehicle Battery Energy-Storage Materials, Anhui Normal University, Wuhu 241000, China
| | - Yucheng Huang
- College of Chemistry and Material Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu 241000, China
- Anhui Key Laboratory of Molecule-Based Materials, Anhui Carbon Neutrality Engineering Center, Anhui Normal University, Wuhu 241000, China
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4
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Akram R, Arif M, Arshad A, Zhang S, Liu W, Wu Z, Zhang T. A 2D Nano-architecture (NPSMC@Ir-Ru@rGO) Derived from Graphene Enfolded Polyphosphazene Nanospheres Decorated Ir-Ru Metals (PZS@Ir-Ru@GO) towards Bifunctional Water Splitting. Chem Asian J 2023; 18:e202300718. [PMID: 37846640 DOI: 10.1002/asia.202300718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/16/2023] [Accepted: 10/16/2023] [Indexed: 10/18/2023]
Abstract
A leap-forward approach has been successfully devised to synthesize a novel hierarchical binary metal modified heteroatom doped 2D micro-/mesporous carbon-graphene nanostructure (NPSMC@Ir-Ru@rGO) for overall water splitting application. To investigate the role of decorating metals, different electrolcatalysts like NPSMC, NPSMC@rGO, NPSMC@Ir@rGO, and NPSMC@Ru@rGO were also synthesized and structural changes were compared and investigated by physiochemical techniques. All of the samples have shown electrocatalytic activities attributed to the presence of heteroatom (N, P, S) doped micro-/mesoporous carbonaceous matrix, amorphous carbon in the coexistence of graphitic lattice carbons, presence of active metal NPs (Ir and/-or Ru), an even distribution of active sites, and graphene 2D interconnected channels to promote electron transfer ability, respectively. However, the Ir-Ru metal codeped nanocatalyst (NPCMS@Ir-Ru@rGO) is proved to be an excellent electrocatalyst based on the synergistic role of Ir-Ru metals that necessitates the low overpotentials of 181 mV and 318 mV to convey a current density of 10 mA cm-2 towards the electroctalytic application of HER and OER, respectively. Furthermore, exhibiting the corresponding Tafel slopes (132 and 70 mV dec-1 ) in an alkaline medium. This work is anticipated to open up new avenues for the development of promising electrocatalysts based on active metals modified heteroatom doped carbon nanomaterials for energy applications.
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Affiliation(s)
- Raheel Akram
- Key Laboratory of Carbon fiber and functional polymers, Beijing University of Chemical Technology, Ministry of education, Beijing, 100029, China
| | - Muhammad Arif
- Institute of Chemical and Environmental Engineering, Khawaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Punjab, 64200, Pakistan
| | - Anila Arshad
- Key Laboratory of Carbon fiber and functional polymers, Beijing University of Chemical Technology, Ministry of education, Beijing, 100029, China
| | - Shuangkun Zhang
- Key Laboratory of Carbon fiber and functional polymers, Beijing University of Chemical Technology, Ministry of education, Beijing, 100029, China
| | - Wei Liu
- Key Laboratory of Carbon fiber and functional polymers, Beijing University of Chemical Technology, Ministry of education, Beijing, 100029, China
| | - Zhanpeng Wu
- Key Laboratory of Carbon fiber and functional polymers, Beijing University of Chemical Technology, Ministry of education, Beijing, 100029, China
| | - Teng Zhang
- School of Electrical Engineering, Beijing Jiao Tong University, Beijing, 100044, China
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5
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Yang F, Zhang L, Li F, Zhang Z, Cui L, Li R, Fan C, Liu J. Enhanced photocatalytic hydrogen evolution of Ru/TiO 2-x via oxygen vacancy-assisted hydrogen spillover process. J Colloid Interface Sci 2023; 650:294-303. [PMID: 37413863 DOI: 10.1016/j.jcis.2023.06.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/23/2023] [Accepted: 06/30/2023] [Indexed: 07/08/2023]
Abstract
Hydrogen spillover effects will significantly improve the activity of photocatalytic hydrogen evolution reactions (HER), while their introduction and optimization require the construction of an excellent metal/support structure. In this study, we have synthesized Ru/TiO2-x catalysts with controlled oxygen vacancy (OVs) concentrations using a simple one-pot solvothermal method. The results show that Ru/TiO2-x3 with the optimal OVs concentration exhibits an unprecedentedly high H2 evolution rate of 13604 μmol·g-1·h-1, which was 45.7 and 2.2 times higher than that of TiO2-x (298 μmol·g-1·h-1) and Ru/TiO2 (6081 μmol·g-1·h-1). Controlled experiments, detailed characterizations, and theoretical calculations have revealed that the introduction of OVs on the carrier contributes to the hydrogen spillover effect in the metal/support system photocatalyst and that the process of hydrogen spillover in this system can be optimized by modulating the OVs concentration. This study proposes a strategy to decrease the energy barrier of hydrogen spillover and enhance photocatalytic HER activity. Moreover, it investigates the effect of OVs concentration on the hydrogen spillover effect in the photocatalytic metal/supports system.
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Affiliation(s)
- Fan Yang
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Lulu Zhang
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Feifei Li
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Zhipeng Zhang
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Luyao Cui
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Rui Li
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, PR China; College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Caimei Fan
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Jianxin Liu
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, PR China.
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6
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Rong C, Dastafkan K, Wang Y, Zhao C. Breaking the Activity and Stability Bottlenecks of Electrocatalysts for Oxygen Evolution Reactions in Acids. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2211884. [PMID: 37549889 DOI: 10.1002/adma.202211884] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 06/28/2023] [Indexed: 08/09/2023]
Abstract
Oxygen evolution reaction (OER) is a cornerstone reaction for a variety of electrochemical energy conversion and storage systems such as water splitting, CO2 /N2 reduction, reversible fuel cells, and metal-air batteries. However, OER catalysis in acids suffers from extra sluggish kinetics due to the additional step of water dissociation along with its multiple electron transfer processes. Furthermore, OER catalysts often suffer from poor stability in harsh acidic electrolytes due to the severe dissolution/corrosion processes. The development of active and stable OER catalysts in acids is highly demanded. Here, the recent advances in OER electrocatalysis in acids are reviewed and the key strategies are summarized to overcome the bottlenecks of activity and stability for both noble-metal-based and noble metal-free catalysts, including i) morphology engineering, ii) composition engineering, and iii) defect engineering. Recent achievements in operando characterization and theoretical calculations are summarized which provide an unprecedented understanding of the OER mechanisms regarding active site identification, surface reconstruction, and degradation/dissolution pathways. Finally, views are offered on the current challenges and opportunities to break the activity-stability relationships for acidic OER in mechanism understanding, catalyst design, as well as standardized stability and activity evaluation for industrial applications such as proton exchange membrane water electrolyzers and beyond.
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Affiliation(s)
- Chengli Rong
- School of Chemistry, The University of New South Wales, Sydney, New South Wales, 2052, Australia
| | - Kamran Dastafkan
- School of Chemistry, The University of New South Wales, Sydney, New South Wales, 2052, Australia
| | - Yuan Wang
- School of Chemistry, The University of New South Wales, Sydney, New South Wales, 2052, Australia
| | - Chuan Zhao
- School of Chemistry, The University of New South Wales, Sydney, New South Wales, 2052, Australia
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7
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Deka N, Jones TE, Falling LJ, Sandoval-Diaz LE, Lunkenbein T, Velasco-Velez JJ, Chan TS, Chuang CH, Knop-Gericke A, Mom RV. On the Operando Structure of Ruthenium Oxides during the Oxygen Evolution Reaction in Acidic Media. ACS Catal 2023; 13:7488-7498. [PMID: 37288096 PMCID: PMC10242682 DOI: 10.1021/acscatal.3c01607] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 05/04/2023] [Indexed: 06/09/2023]
Abstract
In the search for rational design strategies for oxygen evolution reaction (OER) catalysts, linking the catalyst structure to activity and stability is key. However, highly active catalysts such as IrOx and RuOx undergo structural changes under OER conditions, and hence, structure-activity-stability relationships need to take into account the operando structure of the catalyst. Under the highly anodic conditions of the oxygen evolution reaction (OER), electrocatalysts are often converted into an active form. Here, we studied this activation for amorphous and crystalline ruthenium oxide using X-ray absorption spectroscopy (XAS) and electrochemical scanning electron microscopy (EC-SEM). We tracked the evolution of surface oxygen species in ruthenium oxides while in parallel mapping the oxidation state of the Ru atoms to draw a complete picture of the oxidation events that lead to the OER active structure. Our data show that a large fraction of the OH groups in the oxide are deprotonated under OER conditions, leading to a highly oxidized active material. The oxidation is centered not only on the Ru atoms but also on the oxygen lattice. This oxygen lattice activation is particularly strong for amorphous RuOx. We propose that this property is key for the high activity and low stability observed for amorphous ruthenium oxide.
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Affiliation(s)
- Nipon Deka
- Leiden
Institute of Chemistry, Leiden University, 2300 RA Leiden, The Netherlands
| | - Travis E. Jones
- Theoretical
Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Lorenz J. Falling
- Lawrence
Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, California 94720, United States
| | | | - Thomas Lunkenbein
- Fritz
Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | | | - Ting-Shan Chan
- National
Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Cheng-Hao Chuang
- Department
of Physics, Tamkang University, No. 151, Yingzhuan Rd, New Taipei City 25137, Taiwan
| | - Axel Knop-Gericke
- Fritz
Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Rik V. Mom
- Leiden
Institute of Chemistry, Leiden University, 2300 RA Leiden, The Netherlands
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8
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Liu C, Jiang Y, Wang T, Li Q, Liu Y. Nano Si-Doped Ruthenium Oxide Particles from Caged Precursors for High-Performance Acidic Oxygen Evolution. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2207429. [PMID: 36807708 PMCID: PMC10161032 DOI: 10.1002/advs.202207429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/26/2023] [Indexed: 05/06/2023]
Abstract
RuO2 is well known as the benchmark acidic oxygen evolution reaction (OER) catalyst, but its practical application has been impeded by its limited durability. Herein, it is presented that the stability of ruthenium oxide can be significantly improved by pretrapping RuCl3 precursors within a cage compound possessing 72 aromatic rings, which leads to well carbon-coated RuOx particles (Si-RuOx @C) after calcination. The catalyst survives in 0.5 M H2 SO4 for an unprecedented period of 100 hours at 10 mA cm-2 with minimal overpotential change during OER. In contrast, RuOx prepared from similar non-tied compounds doesn't exhibit such catalytic activity, highlighting the importance of the preorganization of Ru precursors within the cage prior to calcination. In addition, the overpotential at 10 mA cm-2 in acid solution is only 220 mV, much less than that of commercial RuO2 . X-ray absorption fine structure (FT-EXAFS) reveals the Si doping through unusual Ru-Si bond, and density functional theory (DFT) calculation reveals the importance of the Ru-Si bond in enhancing both the activity and stability of the catalyst.
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Affiliation(s)
- Chunxiang Liu
- School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Yunbo Jiang
- State Key Laboratory for Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., 650221, Kunming, P. R. China
| | - Teng Wang
- School of Chemistry, Beihang University, Beijing, 100191, P. R. China
- Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Qiaosheng Li
- School of Chemistry, Beihang University, Beijing, 100191, P. R. China
| | - Yuzhou Liu
- School of Chemistry, Beihang University, Beijing, 100191, P. R. China
- Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry, Beihang University, Beijing, 100191, P. R. China
- Research Department, Shenyunzhihe Company, Qidian Center, FL 10, Energy East Rd, #1, Changping District, Beijing, 102206, P. R. China
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9
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Dynamic rhenium dopant boosts ruthenium oxide for durable oxygen evolution. Nat Commun 2023; 14:354. [PMID: 36681684 PMCID: PMC9867741 DOI: 10.1038/s41467-023-35913-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 01/09/2023] [Indexed: 01/22/2023] Open
Abstract
Heteroatom-doping is a practical means to boost RuO2 for acidic oxygen evolution reaction (OER). However, a major drawback is conventional dopants have static electron redistribution. Here, we report that Re dopants in Re0.06Ru0.94O2 undergo a dynamic electron accepting-donating that adaptively boosts activity and stability, which is different from conventional dopants with static dopant electron redistribution. We show Re dopants during OER, (1) accept electrons at the on-site potential to activate Ru site, and (2) donate electrons back at large overpotential and prevent Ru dissolution. We confirm via in situ characterizations and first-principle computation that the dynamic electron-interaction between Re and Ru facilitates the adsorbate evolution mechanism and lowers adsorption energies for oxygen intermediates to boost activity and stability of Re0.06Ru0.94O2. We demonstrate a high mass activity of 500 A gcata.-1 (7811 A gRe-Ru-1) and a high stability number of S-number = 4.0 × 106 noxygen nRu-1 to outperform most electrocatalysts. We conclude that dynamic dopants can be used to boost activity and stability of active sites and therefore guide the design of adaptive electrocatalysts for clean energy conversions.
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10
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Mao X, Wang L, Li Y. Machine-Learning-Assisted Discovery of High-Efficient Oxygen Evolution Electrocatalysts. J Phys Chem Lett 2023; 14:170-177. [PMID: 36579956 DOI: 10.1021/acs.jpclett.2c02873] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Iridium oxide (IrO2) is the predominant electrocatalyst for the oxygen evolution reaction (OER), but its low efficiency and high cost limit its applications. In this work, we have developed a strategy by combination of high-throughput density functional theory (DFT) and machine learning (ML) techniques for material discovery on IrO2-based electrocatalysts with enhanced OER activity. A total of 36 kinds of metal dopants are considered to substitute for Ir to form binary and ternary metal oxides, and the most stable surface structures are selected from a total of 4648 structures for OER activity evaluation. Utilizing the neural network language model (NNLM), we associate the atomic environment with the formation energies of crystals and free energies of OER intermediates, and finally a series of potential candidates have been screened as the superior OER catalysts. Our strategy could efficiently explore promising electrocatalysts, especially for evaluating complex multi-metallic compounds.
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Affiliation(s)
- Xinnan Mao
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu215123, People's Republic of China
| | - Lu Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu215123, People's Republic of China
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu215123, People's Republic of China
- Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, Macau999078, People's Republic of China
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11
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Singh AN, Hajibabaei A, Ha M, Meena A, Kim HS, Bathula C, Nam KW. Reduced Potential Barrier of Sodium-Substituted Disordered Rocksalt Cathode for Oxygen Evolution Electrocatalysts. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 13:10. [PMID: 36615919 PMCID: PMC9824024 DOI: 10.3390/nano13010010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
Cation-disordered rocksalt (DRX) cathodes have been viewed as next-generation high-energy density materials surpassing conventional layered cathodes for lithium-ion battery (LIB) technology. Utilizing the opportunity of a better cation mixing facility in DRX, we synthesize Na-doped DRX as an efficient electrocatalyst toward oxygen evolution reaction (OER). This novel OER electrocatalyst generates a current density of 10 mA cm−2 at an overpotential (η) of 270 mV, Tafel slope of 67.5 mV dec−1, and long-term stability >5.5 days’ superior to benchmark IrO2 (η = 330 mV with Tafel slope = 74.8 mV dec−1). This superior electrochemical behavior is well supported by experiment and sparse Gaussian process potential (SGPP) machine learning-based search for minimum energy structure. Moreover, as oxygen binding energy (OBE) on the surface closely relates to OER activity, our density functional theory (DFT) calculations reveal that Na-doping assists in facile O2 evolution (OBE = 5.45 eV) compared with pristine-DRX (6.51 eV).
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Affiliation(s)
- Aditya Narayan Singh
- Department of Energy and Materials Engineering, Dongguk University—Seoul, Seoul 04620, Republic of Korea
| | - Amir Hajibabaei
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
| | - Miran Ha
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
| | - Abhishek Meena
- Division of Physics and Semiconductor Science, Dongguk University—Seoul, Seoul 04620, Republic of Korea
| | - Hyun-Seok Kim
- Division of Electronics and Electrical Engineering, Dongguk University—Seoul, Seoul 04620, Republic of Korea
| | - Chinna Bathula
- Division of Electronics and Electrical Engineering, Dongguk University—Seoul, Seoul 04620, Republic of Korea
| | - Kyung-Wan Nam
- Department of Energy and Materials Engineering, Dongguk University—Seoul, Seoul 04620, Republic of Korea
- Center for Next Generation Energy and Electronic Materials, Dongguk University—Seoul, Seoul 04620, Republic of Korea
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12
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Ramesh SK, Son J, Ganesan V, Kim J. Carbon-incorporated Ni 2P-Fe 2P hollow nanorods as superior electrocatalysts for the oxygen evolution reaction. NANOSCALE 2022; 14:16262-16269. [PMID: 36285840 DOI: 10.1039/d2nr02663e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
A rational design and cost-effective transition metal-based hollow nanostructures are important for sustainable energy materials with high efficiency. This study reports on carbon-incorporated Ni2P-Fe2P hollow nanorods ((Ni,Fe)2P/C HNRs) derived from a self-template approach as efficient electrocatalysts. Initially, a Ni2(BDC)2(DABCO)-MOF (Ni-MOF) is converted to NiFe-PBA hollow nanorods (HNRs) through facile ion exchange which was further converted to (Ni,Fe)2P/C HNRs via a subsequent phosphidation process. The resulting (Ni,Fe)2P/C HNRs exhibit remarkable activity for the oxygen evolution reaction in an alkaline solution requiring a small overpotential of 258 mV to drive a current density of 10 mA cm-2 and long-term stability with little deactivation after 40 h. (Ni,Fe)2P/C HNRs outperform (Ni,Fe)2P/C NPs and commercial RuO2. The unique hollow morphology and interfacial electronic structure substantially increase the active site and charge transfer rate of our electrocatalyst, resulting in excellent OER activity and stability.
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Affiliation(s)
- Siva Kumar Ramesh
- Department of Chemistry, Kongju National University, 56 Gongjudaehak-ro, Gongju-si, Chungnam-do, 32588, Republic of Korea.
| | - Jihye Son
- Department of Chemistry, Kongju National University, 56 Gongjudaehak-ro, Gongju-si, Chungnam-do, 32588, Republic of Korea.
| | - Vinoth Ganesan
- School of Materials Science and Engineering, Kumoh National Institute of Technology, Gumi-si, Gyeongbuk 39177, Republic of Korea
| | - Jinkwon Kim
- Department of Chemistry, Kongju National University, 56 Gongjudaehak-ro, Gongju-si, Chungnam-do, 32588, Republic of Korea.
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13
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Chand K, Paladino O. Recent developments of membranes and electrocatalysts for the hydrogen production by Anion Exchange Membrane Water Electrolysers: A review. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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14
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Zhang H, Chen C, Wu X, Lv C, Lv Y, Guo J, Jia D. Synergistic Incorporating RuO 2 and NiFeOOH Layers onto Ni 3 S 2 Nanoflakes with Modulated Electron Structure for Efficient Water Splitting. SMALL METHODS 2022; 6:e2200483. [PMID: 35869613 DOI: 10.1002/smtd.202200483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 06/13/2022] [Indexed: 06/15/2023]
Abstract
Synergistic electronic modulations is an effective strategy to develop efficient and stable electrocatalysts for the electrochemical hydrogen production via water splitting. Herein, tremella-like Ni3 S2 @RuO2 and Ni3 S2 @NiFeOOH heterostructures catalysts are constructed on Ni foams (NF) by coupling RuO2 and NiFeOOH on Ni3 S2 nanoflake arrays. The resulting Ni3 S2 @RuO2 /NF electrode exhibits top-level hydrogen evolution reaction electrocatalysis with an extremely low overpotential of 12 mV at 10 mA cm-2 and a Tafel slope of 30.7 mV dec-1 , as well as the as-obtained Ni3 S2 @NiFeOOH/NF electrode with tunable binding energy for OH* intermediates shows remarkable oxygen evolution reaction electrocatalysis with an overpotential of 227 mV at 10 mA cm-2 . The electrolyzer employing Ni3 S2 @RuO2 /NF electrode for cathodic H2 production and Ni3 S2 @NiFeOOH/NF for anodic O2 production merely needs a low voltage of 1.47 V to drive 10 mA cm-2 with excellent durability. The combined theoretical calculation and X-ray photoelectron spectroscopy investigation reveal that heterogeneous configuration can induce electron transfer from Ni3 S2 to RuO2 through NiRu/SRu bonds, and thus tailor the d-band center and optimize the activated H2 O/H* Gibbs free energies for enhanced hydrogen evolution reaction on Ni3 S2 @RuO2 . This study may shed new light on the construction of heterostructures as highest-performing electrocatalysts and offer unique insight into the theory mechanism.
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Affiliation(s)
- Hongmei Zhang
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830046, P. R. China
| | - Chu Chen
- Institute of Physical Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830046, P. R. China
| | - Xueyan Wu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830046, P. R. China
| | - Changwu Lv
- Institute of Physical Science and Technology, Xinjiang University, Urumqi, Xinjiang, 830046, P. R. China
| | - Yan Lv
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830046, P. R. China
| | - Jixi Guo
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830046, P. R. China
| | - Dianzeng Jia
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830046, P. R. China
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15
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Xu S, Hu J, Huang L, Liu Y, Zheng X, Jiang D. Anchoring RuSe2 on CoSe2 nanoarrays as a hybrid catalyst for efficient and robust oxygen evolution reaction. J Colloid Interface Sci 2022; 615:327-334. [DOI: 10.1016/j.jcis.2022.01.111] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/13/2022] [Accepted: 01/17/2022] [Indexed: 10/19/2022]
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16
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Qin Y, Wang Z, Fu Z, Lai J, Wang L. PdRu/CNTs synthesized by microwave‐assisted method for high stable acidic oxygen evolution reaction. ELECTROCHEMICAL SCIENCE ADVANCES 2022. [DOI: 10.1002/elsa.202100111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Yingnan Qin
- Key Laboratory of Eco‐chemical Engineering Key Laboratory of Optic‐Electric Sensing and Analytical Chemistry of Life Science Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao PR China
| | - Zuochao Wang
- Key Laboratory of Eco‐chemical Engineering Key Laboratory of Optic‐Electric Sensing and Analytical Chemistry of Life Science Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao PR China
| | - Ziqi Fu
- Key Laboratory of Eco‐chemical Engineering Key Laboratory of Optic‐Electric Sensing and Analytical Chemistry of Life Science Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao PR China
| | - Jianping Lai
- Key Laboratory of Eco‐chemical Engineering Key Laboratory of Optic‐Electric Sensing and Analytical Chemistry of Life Science Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao PR China
| | - Lei Wang
- Key Laboratory of Eco‐chemical Engineering Key Laboratory of Optic‐Electric Sensing and Analytical Chemistry of Life Science Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao PR China
- College of Environment and Safety Engineering Qingdao University of Science and Technology Qingdao PR China
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17
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Zheng W, Lee LYS. Observing Electrocatalytic Processes via In Situ Electrochemical Scanning Tunneling Microscopy: Latest Advances. Chem Asian J 2022; 17:e202200384. [PMID: 35621190 DOI: 10.1002/asia.202200384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/25/2022] [Indexed: 11/08/2022]
Abstract
Electrocatalysis is the foundation of many techniques that are currently used to address both environmental and energy problems. Therefore, understanding electrocatalytic processes is essential to guide the rational design of electrocatalysts. Scanning tunneling microscopy (STM), which was developed in the 1980s, remains one of the few techniques that allow surface imaging at the atomic level, making it incredibly useful in electrocatalytic research. In this review, we introduced the basic concept and latest applications of the STM technique for in situ studies of electrocatalytic processes, particularly its capability in analyzing species adsorption/desorption, surface reconstruction, active site identification, and electrocatalyst dissolution, as well as its advantages and limitations.
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Affiliation(s)
- Weiran Zheng
- The Hong Kong Polytechnic University, Department of Applied Biology and Chemical Technology, HONG KONG
| | - Lawrence Yoon Suk Lee
- The Hong Kong Polytechnic University, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, ., Hung Hom, HONG KONG
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18
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Scott SB, Rao RR, Moon C, Sørensen JE, Kibsgaard J, Shao-Horn Y, Chorkendorff I. The low overpotential regime of acidic water oxidation part I: the importance of O 2 detection. ENERGY & ENVIRONMENTAL SCIENCE 2022; 15:1977-1987. [PMID: 35706423 PMCID: PMC9116083 DOI: 10.1039/d1ee03914h] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 03/18/2022] [Indexed: 05/20/2023]
Abstract
The high overpotential required for the oxygen evolution reaction (OER) represents a significant barrier for the production of closed-cycle renewable fuels and chemicals. Ruthenium dioxide is among the most active catalysts for OER in acid, but the activity at low overpotentials can be difficult to measure due to high capacitance. In this work, we use electrochemistry - mass spectrometry to obtain accurate OER activity measurements spanning six orders of magnitude on a model series of ruthenium-based catalysts in acidic electrolyte, quantifying electrocatalytic O2 production at potential as low as 1.30 VRHE. We show that the potential-dependent O2 production rate, i.e., the Tafel slope, exhibits three regimes, revealing a previously unobserved Tafel slope of 25 mV decade-1 below 1.4 VRHE. We fit the expanded activity data to a microkinetic model based on potential-dependent coverage of the surface intermediates from which the rate-determining step takes place. Our results demonstrate how the familiar quantities "onset potential" and "exchange current density" are influenced by the sensitivity of the detection method.
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Affiliation(s)
- Soren B Scott
- SurfCat Section for Surface Physics and Catalysis, Department of Physics, Technical University of Denmark Kgs. Lyngby Denmark
| | - Reshma R Rao
- Department of Mechanical Engineering, Massachusetts Institute of Technology Cambridge Massachusetts USA
| | - Choongman Moon
- SurfCat Section for Surface Physics and Catalysis, Department of Physics, Technical University of Denmark Kgs. Lyngby Denmark
| | - Jakob E Sørensen
- SurfCat Section for Surface Physics and Catalysis, Department of Physics, Technical University of Denmark Kgs. Lyngby Denmark
| | - Jakob Kibsgaard
- SurfCat Section for Surface Physics and Catalysis, Department of Physics, Technical University of Denmark Kgs. Lyngby Denmark
| | - Yang Shao-Horn
- Department of Mechanical Engineering, Massachusetts Institute of Technology Cambridge Massachusetts USA
| | - Ib Chorkendorff
- SurfCat Section for Surface Physics and Catalysis, Department of Physics, Technical University of Denmark Kgs. Lyngby Denmark
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19
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Mom RV, Falling LJ, Kasian O, Algara-Siller G, Teschner D, Crabtree RH, Knop-Gericke A, Mayrhofer KJJ, Velasco-Vélez JJ, Jones TE. Operando Structure–Activity–Stability Relationship of Iridium Oxides during the Oxygen Evolution Reaction. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05951] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rik V. Mom
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
| | - Lorenz J. Falling
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Olga Kasian
- Helmholtz-Zentrum Berlin GmbH, Helmholtz Institute Erlangen-Nürnberg, 14109 Berlin, Germany
- Max Planck Institute for Iron Research, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
| | - Gerardo Algara-Siller
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Detre Teschner
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45413 Mülheim an der Ruhr, Germany
| | - Robert H. Crabtree
- Department of Chemistry and Energy Sciences Institute, Yale University, New Haven, Connecticut 06520, United States
| | - Axel Knop-Gericke
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45413 Mülheim an der Ruhr, Germany
| | - Karl J. J. Mayrhofer
- Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstraße 3, 91058 Erlangen, Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | | | - Travis E. Jones
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
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20
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Shi C, Yuan Y, Shen Q, Yang X, Cao B, Xu B, Kang B, Sun Y, Li C. Encapsulated ruthenium nanoparticles activated few-layer carbon frameworks as high robust oxygen evolution electrocatalysts in acidic media. J Colloid Interface Sci 2022; 612:488-495. [PMID: 34999553 DOI: 10.1016/j.jcis.2021.12.150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/17/2021] [Accepted: 12/22/2021] [Indexed: 10/19/2022]
Abstract
Noble metals have been extensively employed as high active catalysts for oxygen evolution reaction (OER), are usually subjected to serious surface transformation and poor structural stability, especially in acid media, which need imperatively remedied. Herein, the interfacial engineering of Ru via few-layer carbon (Ru@FLC) was carried out, in which FLC can significantly suppress the corrosion of Ru in acid media, ensuring the efficient interfacial charge transport between Ru and FLC. As a result, a low overpotentials@10 mA cm-2 of 258 mV and small Tafel slopes of 53.1 mV dec-1 for oxygen evolution OER were achieved in acid media. DFT calculations disclose that outer FLC could induce charge redistribution and effectively optimize intermediates free energy adsorption, resulting in greatly reduce the energy barrier for OER. Our work may offer a new avenue to produce progressive OER electrocatalysts for energy-related applications in acid solution.
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Affiliation(s)
- Chuanxin Shi
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Yuan Yuan
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Qi Shen
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Xiaodong Yang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Bingqiang Cao
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Bo Xu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Baotao Kang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Yiqiang Sun
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China; School of Materials Science and Engineering, University of Jinan, Jinan 250022, China; Foshan (Southern China) Institute for New Materials, Foshan 528200, Guangdong, China
| | - Cuncheng Li
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
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21
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Uchiyama S, Morinaga A, Tsutsumi H, Katayama Y. Tuning the Polarity of a Fibrous Poly(vinylidene fluoride- co-hexafluoropropylene)-Based Support for Efficient Water Electrolysis. ACS OMEGA 2022; 7:10077-10086. [PMID: 35382293 PMCID: PMC8973098 DOI: 10.1021/acsomega.1c06128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 02/14/2022] [Indexed: 06/14/2023]
Abstract
Water electrolysis under alkaline conditions is of interest due to the applicability of non-precious metal-based materials for electrocatalysts. However, the successful design and synthesis of earth-abundant and efficient catalysts for the oxygen evolution reaction (OER) remain a significant challenge. This work presents cost-effective and straightforward ways to improve the OER activity under alkaline conditions by activating the catalyst-support and reactant-support interaction. Micro/nano-sized fibrous poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) was synthesized via simple and scalable electrospinning and subsequently coated with Cu by electroless deposition to obtain the electrocatalyst with a large specific surface area, enhanced mass transport, and high catalyst utilization. Scanning electron microscopy, infrared spectroscopy, and X-ray diffraction confirmed the successful synthesis of the series of Cu/PVdF-HFP fibrous catalysts with varied ferroelectric polarizability of the PVdF-HFP support in the order of stretch-anneal > anneal > stretch > without pre-treatment of the catalyst. The best OER activity was confirmed for the Cu/PVdF-HFP catalyst with stretch and annealed treatment among the catalysts tested, suggesting that both the reaction kinetics and energetics of stretch-annealed Cu/PVdF-HFP catalysts were optimal for the OER. The electron delocalization between Cu and PVdF-HFP substrates (electron transfer from Cu to the negatively charged (δ- eff) PVdF-HFP region at the Cu|PVdF-HFP interface) and the enhanced transport of reactive hydroxide species and/or the increase in the local pH by positively charged (δ+ eff) PVdF-HFP region concertedly accelerate the OER activity. The overall activity for the prototype water electrolyzer increased 10-fold with stretch-anneal treatment compared to the one without pre-treatment, highlighting the effect of tuning the catalyst-support and reactant-support interaction on improving the efficiency of the water electrolysis.
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22
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Boosting the Electrocatalytic Activity of Nickel-Iron Layered Double Hydroxide for the Oxygen Evolution Reaction byTerephthalic Acid. Catalysts 2022. [DOI: 10.3390/catal12030258] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The development of a new type of oxygen evolution reaction (OER) catalyst to reduce the energy loss in the process of water electrolysis is of great significance to the realization of the industrialization of hydrogen energy storage. Herein, we report the catalysts of NiFe double-layer hydroxide (NiFe-LDH) mixed with different equivalent terephthalic acid (TPA), synthesized by the hydrothermal method. The catalyst synthesized with the use of the precursor solution containing one equivalent of TPA shows the best performance with the current density of 2 mA cm−2 at an overpotential of 270 mV, the Tafel slope of 40 mV dec−1, and excellent stable electrocatalytic performance for OER. These catalysts were characterized in a variety of methods. X-ray diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR), and Raman spectrum proved the presence of TPA in the catalysts. The lamellar structure and the uniform distribution of Ni and Fe in the catalysts were observed by a scanning electron microscope (SEM) and a transmission electron microscope (TEM). In X-ray photoelectron spectroscopy (XPS) of NiFe-LDH with and without TPA, the changes in the peak positions of Ni and Fe spectra indicate strong electronic interactions between TPA and Ni and Fe atoms. These results suggest that a certain amount of TPA can boost catalytic activity.
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23
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Yang Y, Peltier CR, Zeng R, Schimmenti R, Li Q, Huang X, Yan Z, Potsi G, Selhorst R, Lu X, Xu W, Tader M, Soudackov AV, Zhang H, Krumov M, Murray E, Xu P, Hitt J, Xu L, Ko HY, Ernst BG, Bundschu C, Luo A, Markovich D, Hu M, He C, Wang H, Fang J, DiStasio RA, Kourkoutis LF, Singer A, Noonan KJT, Xiao L, Zhuang L, Pivovar BS, Zelenay P, Herrero E, Feliu JM, Suntivich J, Giannelis EP, Hammes-Schiffer S, Arias T, Mavrikakis M, Mallouk TE, Brock JD, Muller DA, DiSalvo FJ, Coates GW, Abruña HD. Electrocatalysis in Alkaline Media and Alkaline Membrane-Based Energy Technologies. Chem Rev 2022; 122:6117-6321. [PMID: 35133808 DOI: 10.1021/acs.chemrev.1c00331] [Citation(s) in RCA: 89] [Impact Index Per Article: 44.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hydrogen energy-based electrochemical energy conversion technologies offer the promise of enabling a transition of the global energy landscape from fossil fuels to renewable energy. Here, we present a comprehensive review of the fundamentals of electrocatalysis in alkaline media and applications in alkaline-based energy technologies, particularly alkaline fuel cells and water electrolyzers. Anion exchange (alkaline) membrane fuel cells (AEMFCs) enable the use of nonprecious electrocatalysts for the sluggish oxygen reduction reaction (ORR), relative to proton exchange membrane fuel cells (PEMFCs), which require Pt-based electrocatalysts. However, the hydrogen oxidation reaction (HOR) kinetics is significantly slower in alkaline media than in acidic media. Understanding these phenomena requires applying theoretical and experimental methods to unravel molecular-level thermodynamics and kinetics of hydrogen and oxygen electrocatalysis and, particularly, the proton-coupled electron transfer (PCET) process that takes place in a proton-deficient alkaline media. Extensive electrochemical and spectroscopic studies, on single-crystal Pt and metal oxides, have contributed to the development of activity descriptors, as well as the identification of the nature of active sites, and the rate-determining steps of the HOR and ORR. Among these, the structure and reactivity of interfacial water serve as key potential and pH-dependent kinetic factors that are helping elucidate the origins of the HOR and ORR activity differences in acids and bases. Additionally, deliberately modulating and controlling catalyst-support interactions have provided valuable insights for enhancing catalyst accessibility and durability during operation. The design and synthesis of highly conductive and durable alkaline membranes/ionomers have enabled AEMFCs to reach initial performance metrics equal to or higher than those of PEMFCs. We emphasize the importance of using membrane electrode assemblies (MEAs) to integrate the often separately pursued/optimized electrocatalyst/support and membranes/ionomer components. Operando/in situ methods, at multiscales, and ab initio simulations provide a mechanistic understanding of electron, ion, and mass transport at catalyst/ionomer/membrane interfaces and the necessary guidance to achieve fuel cell operation in air over thousands of hours. We hope that this Review will serve as a roadmap for advancing the scientific understanding of the fundamental factors governing electrochemical energy conversion in alkaline media with the ultimate goal of achieving ultralow Pt or precious-metal-free high-performance and durable alkaline fuel cells and related technologies.
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Affiliation(s)
- Yao Yang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Cheyenne R Peltier
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Rui Zeng
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Roberto Schimmenti
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Qihao Li
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xin Huang
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - Zhifei Yan
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Georgia Potsi
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Ryan Selhorst
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Xinyao Lu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Weixuan Xu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Mariel Tader
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Alexander V Soudackov
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Hanguang Zhang
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Mihail Krumov
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Ellen Murray
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Pengtao Xu
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Jeremy Hitt
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Linxi Xu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Hsin-Yu Ko
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Brian G Ernst
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Colin Bundschu
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Aileen Luo
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Danielle Markovich
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - Meixue Hu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Cheng He
- Chemical and Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Hongsen Wang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Jiye Fang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Robert A DiStasio
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Lena F Kourkoutis
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
| | - Andrej Singer
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Kevin J T Noonan
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Li Xiao
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Lin Zhuang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Bryan S Pivovar
- Chemical and Materials Science Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
| | - Piotr Zelenay
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Enrique Herrero
- Instituto de Electroquímica, Universidad de Alicante, Alicante E-03080, Spain
| | - Juan M Feliu
- Instituto de Electroquímica, Universidad de Alicante, Alicante E-03080, Spain
| | - Jin Suntivich
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
| | - Emmanuel P Giannelis
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | | | - Tomás Arias
- Department of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Thomas E Mallouk
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Joel D Brock
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
| | - David A Muller
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.,Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States
| | - Francis J DiSalvo
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Geoffrey W Coates
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Héctor D Abruña
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States.,Center for Alkaline Based Energy Solutions (CABES), Cornell University, Ithaca, New York 14853, United States
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24
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Moon G, Wang Y, Kim S, Budiyanto E, Tüysüz H. Preparation of Practical High-Performance Electrodes for Acidic and Alkaline Media Water Electrolysis. CHEMSUSCHEM 2022; 15:e202102114. [PMID: 34846780 PMCID: PMC9299631 DOI: 10.1002/cssc.202102114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/29/2021] [Indexed: 06/13/2023]
Abstract
The synthesis of electrocatalyst and the electrode preparation were merged into a one-step process and proved to be a versatile method to synthesize metal oxide electrocatalysts on the conductive carbon paper (CP). Very simply, the metal precursor deposited on the CP was thermally treated by a torch-gun for just 6 s, resulting in the formation of RuO2 , Co3 O4 , and mixed oxide nanoparticles. The material could be directly used as working electrode for oxygen evolution reaction (OER). Compared with commercial and other state-of-the-art electrocatalysts, the fabricated electrode showed a superior electrocatalytic activity for OER in 1 m HClO4 and 1 m KOH in terms of not only a low overpotential to reach 10 mA cm-2 but also a high current density at 1.6 VRHE with satisfying a long-term stability. The novel strategy without requiring time-consuming and uneconomical steps could be expanded to the preparation of various metal oxides on conductive substrates towards diverse electrocatalytic applications.
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Affiliation(s)
- Gun‐hee Moon
- Department of Heterogeneous CatalysisMax-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an derRuhrGermany
- Current addressExtreme Materials Research CenterKorea Institute of Science and Technology (KIST)Seoul02792South Korea
| | - Yue Wang
- Department of Heterogeneous CatalysisMax-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an derRuhrGermany
| | - Seongseop Kim
- Department of Heterogeneous CatalysisMax-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an derRuhrGermany
| | - Eko Budiyanto
- Department of Heterogeneous CatalysisMax-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an derRuhrGermany
| | - Harun Tüysüz
- Department of Heterogeneous CatalysisMax-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an derRuhrGermany
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25
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Wang T, Li N, Luo S, Wang L, Jiang L, Han C, Yu D. Catalyst activation by cold plasma technology and its effect on isomerization of safflower seed oil. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.102942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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26
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Zhang Z, Li Y, Zhang Z, Zheng H, Liu Y, Yan Y, Li C, Lu H, Shi Z, Feng S. An electrochemical modification strategy to fabricate NiFeCuPt polymetallic carbon matrices on nickel foam as stable electrocatalysts for water splitting. Chem Sci 2022; 13:8876-8884. [PMID: 35975144 PMCID: PMC9350615 DOI: 10.1039/d2sc02845j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 07/04/2022] [Indexed: 11/29/2022] Open
Abstract
Electrochemical modification is a mild and economical way to prepare electrocatalytic materials with abundant active sites and high atom efficiency. In this work, a stable NiFeCuPt carbon matrix deposited on nickel foam (NFFeCuPt) was fabricated with an extremely low Pt load (∼28 μg cm−2) using one-step electrochemical co-deposition modification, and it serves as a bifunctional catalyst for overall water splitting and achieves 100 mA cm−2 current density at a low cell voltage of 1.54 V in acidic solution and 1.63 V in alkaline solution, respectively. In addition, a novel electrolyte was developed to stabilize the catalyst under acidic conditions, which provides inspiration for the development of highly efficient, highly stable, and cost-effective ways to synthesize electrocatalysts. Multiple metal elements immobilized into a carbon matrix to fabricate an ultra-stable water splitting electrocatalyst by one-step electrochemical modification.![]()
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Affiliation(s)
- Ziqi Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yiduo Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Zhe Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - He Zheng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yuxin Liu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yuxing Yan
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Chunguang Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Haiyan Lu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Zhan Shi
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Shouhua Feng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
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27
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Xu Y, Fan K, Zou Y, Fu H, Dong M, Dou Y, Wang Y, Chen S, Yin H, Al-Mamun M, Liu P, Zhao H. Rational design of metal oxide catalysts for electrocatalytic water splitting. NANOSCALE 2021; 13:20324-20353. [PMID: 34870672 DOI: 10.1039/d1nr06285a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Electrocatalytic energy conversion between electricity and chemical bonding energy is realized through redox reactions with multiple charge transfer steps at the electrode-electrolyte interface. The surface atomic structure of the electrode materials, if appropriately designed, will provide an energetically affordable pathway with individual reaction intermediates that not only reduce the thermodynamic energy barrier but also allow an acceptably fast kinetic rate of the overall redox reaction. As one of the most abundant and stable forms, oxides of transitional metals demonstrated promising electrocatalytic activities towards multiple important chemical reactions. In this topical review, we attempt to discuss the possible avenues to construct the electrocatalytic active surface for this important class of materials for two essential chemical reactions for water splitting. A general introduction of the electrochemical water splitting process on the electrocatalyst surface with applied potential will be provided, followed by a discussion on the fundamental charge transfers and the mechanism. As the generally perceived active sites are chemical reaction dependent, we offer a general overview of the possible approaches to construct or create electrocatalytically active sites in the context of surface atomic structure engineering. The review concludes with perspectives that summarize challenges and opportunities in electrocatalysis and how these can be addressed to unlock the electrocatalytic potentials of the metal oxide materials.
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Affiliation(s)
- Yiming Xu
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Kaicai Fan
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Yu Zou
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Huaiqin Fu
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Mengyang Dong
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Yuhai Dou
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Yun Wang
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Shan Chen
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Huajie Yin
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
- Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, P. R. China
| | - Mohammad Al-Mamun
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Porun Liu
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
| | - Huijun Zhao
- Centre for Catalysis and Clean Energy, School of Environment and Science, Griffith University, Gold Coast Campus, Queensland, 4222, Australia.
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28
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Zhou Y, Sheng L, Luo Q, Zhang W, Yang J. Improving the Activity of Electrocatalysts toward the Hydrogen Evolution Reaction, the Oxygen Evolution Reaction, and the Oxygen Reduction Reaction via Modification of Metal and Ligand of Conductive Two-Dimensional Metal-Organic Frameworks. J Phys Chem Lett 2021; 12:11652-11658. [PMID: 34822246 DOI: 10.1021/acs.jpclett.1c03452] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Exploring efficient and stable electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution and reduction reactions (OER and ORR) is vital to the development of renewable energy technologies. Herein, on the basis of density functional theory (DFT) calculations, we systematically investigated 30 TMNxO4-x-HTP (TM = Fe, Co, Ni, Ru, Rh and Pd; x = 0-4; HTP refers to hexatriphenylene) analogs of conductive two-dimensional (2D) metal-organic frameworks (MOFs) as potential catalysts for HER, OER, and ORR. The results show the good stabilities and metallic features of TMNxO4-x-HTP. The interaction strength between intermediates and catalysts governs the catalytic activities, which can be modulated by tuning the TM atom and the local coordination number of N/O in catalysts. RhN3O1-HTP is an efficient bifunctional catalyst for HER and OER, and RhN1O3-HTP is a promising bifunctional catalyst for OER and ORR. Our findings highlight a potentially efficient class of electrocatalysts based on 2D MOF materials.
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Affiliation(s)
- Yanan Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion and Synergetic Innovation Centre of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui230026, China
| | - Li Sheng
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui230026, China
| | - Qiquan Luo
- Institutes of Physical Science and Information Technology, Anhui University, Hefei230601, China
| | - Wenhua Zhang
- Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences (CAS), Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jinlong Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion and Synergetic Innovation Centre of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui230026, China
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29
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Han T, Wu J, Lu X, Wang Y, Zhao H, Tang X. Study of OER electrocatalysts performance of Fe/Mn doped pyrochlorestructure. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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30
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Janani G, Surendran S, Choi H, Han MK, Sim U. In Situ Grown CoMn 2 O 4 3D-Tetragons on Carbon Cloth: Flexible Electrodes for Efficient Rechargeable Zinc-Air Battery Powered Water Splitting Systems. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2103613. [PMID: 34677907 DOI: 10.1002/smll.202103613] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/30/2021] [Indexed: 06/13/2023]
Abstract
The integration of energy conversion and storage systems such as electrochemical water splitting (EWS) and rechargeable zinc-air battery (ZAB) is on the vision to provide a sustainable future with green energy resources. Herein, a unique strategy for decorating 3D tetragonal CoMn2 O4 on carbon cloth (CMO-U@CC) via a facile one-pot in situ hydrothermal process, is reported. The highly exposed morphology of 3D tetragons enhances the electrocatalytic activity of CMO-U@CC. This is the first demonstration of such a bifunctional activity of CMO-U@CC in an EWS system; it achieves a nominal cell voltage of 1.610 V @ 10 mA cm-2 . Similarly, the fabricated rechargeable ZAB delivers a specific capacity of 641.6 mAh gzn -1 , a power density of 135 mW cm-2 , and excellent cyclic stability (50 h @ 10 mA cm-2 ). Additionally, a series of flexible solid-state ZABs are fabricated and employed to power the assembled CMO-U@CC-based water electrolyzer. To the best of the authors' knowledge, this is the first demonstration of an in situ-grown binder-free CMO-U@CC as a flexible multifunctional electrocatalyst for a built-in integrated rechargeable ZAB-powered EWS system.
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Affiliation(s)
- Gnanaprakasam Janani
- Department of Materials Science & Engineering, Engineering Research Center, Optoelectronics Convergence Research Center, Future Energy Engineering Convergence and College of AI Convergence, Chonnam National University, Gwangju, 61186, South Korea
| | - Subramani Surendran
- Department of Materials Science & Engineering, Engineering Research Center, Optoelectronics Convergence Research Center, Future Energy Engineering Convergence and College of AI Convergence, Chonnam National University, Gwangju, 61186, South Korea
| | - Hyeonuk Choi
- Department of Materials Science & Engineering, Engineering Research Center, Optoelectronics Convergence Research Center, Future Energy Engineering Convergence and College of AI Convergence, Chonnam National University, Gwangju, 61186, South Korea
| | - Mi-Kyung Han
- Department of Materials Science & Engineering, Engineering Research Center, Optoelectronics Convergence Research Center, Future Energy Engineering Convergence and College of AI Convergence, Chonnam National University, Gwangju, 61186, South Korea
- Research Institute, NEEL Sciences, INC., Gwangju, 61186, South Korea
| | - Uk Sim
- Department of Materials Science & Engineering, Engineering Research Center, Optoelectronics Convergence Research Center, Future Energy Engineering Convergence and College of AI Convergence, Chonnam National University, Gwangju, 61186, South Korea
- Research Institute, NEEL Sciences, INC., Gwangju, 61186, South Korea
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31
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Bhowmik K, Dutta A, Vyas MK, Ota J, Hait SK, Kagdiyal V, Saxena D, Ramakumar SSV. Resorcinol/Formaldehyde polymer derived carbon protected CoSe
2
nanocubes: A non‐precious, efficient, and durable electrocatalyst for oxygen evolution reaction. ELECTROCHEMICAL SCIENCE ADVANCES 2021. [DOI: 10.1002/elsa.202100064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Koushik Bhowmik
- Research & Development Centre Indian Oil Corporation Limited Faridabad India
| | - Anirban Dutta
- Research & Development Centre Indian Oil Corporation Limited Faridabad India
| | - Mukesh Kumar Vyas
- Research & Development Centre Indian Oil Corporation Limited Faridabad India
| | - Jyotiranjan Ota
- Research & Development Centre Indian Oil Corporation Limited Faridabad India
| | - Samik Kumar Hait
- Research & Development Centre Indian Oil Corporation Limited Faridabad India
| | | | - Deepak Saxena
- Research & Development Centre Indian Oil Corporation Limited Faridabad India
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32
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Mu Y, Wang T, Zhang J, Meng C, Zhang Y, Kou Z. Single-Atom Catalysts: Advances and Challenges in Metal-Support Interactions for Enhanced Electrocatalysis. ELECTROCHEM ENERGY R 2021. [DOI: 10.1007/s41918-021-00124-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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33
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Huang J, Scott SB, Chorkendorff I, Wen Z. Online Electrochemistry–Mass Spectrometry Evaluation of the Acidic Oxygen Evolution Reaction at Supported Catalysts. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03430] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Junheng Huang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
| | - Soren B. Scott
- Department of Physics, Technical University of Denmark, Fysikvej, Building 312, DK-2800 Kgs. Lyngby, Denmark
| | - Ib Chorkendorff
- Department of Physics, Technical University of Denmark, Fysikvej, Building 312, DK-2800 Kgs. Lyngby, Denmark
| | - Zhenhai Wen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China
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34
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Chikunov AS, Yashnik SA, Taran OP, Kurenkova AY, Parmon VN. Cu(II) oxo/hydroxides stabilized by ZSM-5 zeolite as an efficient and robust catalyst for chemical and photochemical water oxidation with Ru(bpy)33+. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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35
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Yin K, Chao Y, Lv F, Tao L, Zhang W, Lu S, Li M, Zhang Q, Gu L, Li H, Guo S. One Nanometer PtIr Nanowires as High-Efficiency Bifunctional Catalysts for Electrosynthesis of Ethanol into High Value-Added Multicarbon Compound Coupled with Hydrogen Production. J Am Chem Soc 2021; 143:10822-10827. [PMID: 34279921 DOI: 10.1021/jacs.1c04626] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The electrosynthesis of high-value-added multicarbon compounds coupled with hydrogen production is an efficient way to achieve carbon neutrality; however, the lack of effective bifunctional catalysts in electrosynthesis largely hinders its development. Herein, we report the first example on the highly efficient electrosynthesis of high-value-added 1,1-diethoxyethane (DEE) at the anode and high-purity hydrogen at the cathode using 1 nm PtIr nanowires (NWs) as the bifunctional catalysts. We demonstrate that the cell using 1 nm PtIr nanowires as the bifunctional catalysts can achieve a reported lowest voltage of 0.61 V to reach the current density of 10 mA cm-2, much lower than those of the Pt NWs (0.85 V) and commercial Pt/C (0.86 V), and also can have the highest Faraday efficiencies of 85% for DEE production and 94.0% for hydrogen evolution in all the reported electrosynthesis catalysts. The in situ infrared spectroscopy study reveals that PtIr NWs can facilitate the activation of O-H and C-H bonds in ethanol, which is important for the formation of acetaldehyde intermediate, and finally DEE. In addition, the cell using PtIr NWs as bifunctional catalysts exhibits excellent stability by showing almost no obvious decrease in the Faraday efficiency of the DEE production.
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Affiliation(s)
- Kun Yin
- School of Materials Science and Engineering, Peking University, Beijing 100871, China.,Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 10081, China
| | - Yuguang Chao
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Fan Lv
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Lu Tao
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Weiyu Zhang
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Shiyu Lu
- School of Materials Science and Engineering, Peking University, Beijing 100871, China.,BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
| | - Menggang Li
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Hongbo Li
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 10081, China
| | - Shaojun Guo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China.,BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China
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36
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Pishgar S, Gulati S, Strain JM, Liang Y, Mulvehill MC, Spurgeon JM. In Situ Analytical Techniques for the Investigation of Material Stability and Interface Dynamics in Electrocatalytic and Photoelectrochemical Applications. SMALL METHODS 2021; 5:e2100322. [PMID: 34927994 DOI: 10.1002/smtd.202100322] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/17/2021] [Indexed: 06/14/2023]
Abstract
Electrocatalysis and photoelectrochemistry are critical to technologies like fuel cells, electrolysis, and solar fuels. Material stability and interfacial phenomena are central to the performance and long-term viability of these technologies. Researchers need tools to uncover the fundamental processes occurring at the electrode/electrolyte interface. Numerous analytical instruments are well-developed for material characterization, but many are ex situ techniques often performed under vacuum and without applied bias. Such measurements miss dynamic phenomena in the electrolyte under operational conditions. However, innovative advancements have allowed modification of these techniques for in situ characterization in liquid environments at electrochemically relevant conditions. This review explains some of the main in situ electrochemical characterization techniques, briefly explaining the principle of operation and highlighting key work in applying the method to investigate material stability and interfacial properties for electrocatalysts and photoelectrodes. Covered methods include spectroscopy (in situ UV-vis, ambient pressure X-ray photoelectron spectroscopy (APXPS), and in situ Raman), mass spectrometry (on-line inductively coupled plasma mass spectrometry (ICP-MS) and differential electrochemical mass spectrometry (DEMS)), and microscopy (in situ transmission electron microscopy (TEM), electrochemical atomic force microscopy (EC-AFM), electrochemical scanning tunneling microscopy (EC-STM), and scanning electrochemical microscopy (SECM)). Each technique's capabilities and advantages/disadvantages are discussed and summarized for comparison.
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Affiliation(s)
- Sahar Pishgar
- Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY, 40292, USA
| | - Saumya Gulati
- Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY, 40292, USA
| | - Jacob M Strain
- Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY, 40292, USA
| | - Ying Liang
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Guangzhou, Guangdong, 510006, China
| | - Matthew C Mulvehill
- Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY, 40292, USA
| | - Joshua M Spurgeon
- Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY, 40292, USA
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37
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Abstract
The synthesis of nanomaterials, with characteristic dimensions of 1 to 100 nm, is a key component of nanotechnology. Vapor-phase synthesis of nanomaterials has numerous advantages such as high product purity, high-throughput continuous operation, and scalability that have made it the dominant approach for the commercial synthesis of nanomaterials. At the same time, this class of methods has great potential for expanded use in research and development. Here, we present a broad review of progress in vapor-phase nanomaterial synthesis. We describe physically-based vapor-phase synthesis methods including inert gas condensation, spark discharge generation, and pulsed laser ablation; plasma processing methods including thermal- and non-thermal plasma processing; and chemically-based vapor-phase synthesis methods including chemical vapor condensation, flame-based aerosol synthesis, spray pyrolysis, and laser pyrolysis. In addition, we summarize the nanomaterials produced by each method, along with representative applications, and describe the synthesis of the most important materials produced by each method in greater detail.
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Affiliation(s)
- Mohammad Malekzadeh
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
| | - Mark T Swihart
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA. and RENEW Institute, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
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38
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You H, Wang B, Wang Y, Cao Y, Wei K, Gao F. Efficient fish-scale CeO 2/NiFeCo composite material as electrocatalyst for oxygen evolution reaction. NANOTECHNOLOGY 2021; 32:365403. [PMID: 33836518 DOI: 10.1088/1361-6528/abf690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 04/09/2021] [Indexed: 06/12/2023]
Abstract
An electrochemical catalyst with efficient, stable, inexpensive energy storage for oxygen evolution and hydrogen evolution has raised global concerns on energy, calling for high-performance materials for effective treatments. In this paper, novel amorphous polymetallic doped CeO2particles were prepared for an electrochemical catalyst via homogeneous phase precipitation at room temperature. Metal ions can be easily embedded into the oxygen vacancies formed by CeO2, and the the electron transport capacity of the CeO2/NiFeCo electrocatalyst is improved owing to the increase in active sites. In addition, the amorphous CeO2/NiFeCo composite material is in a metastable state and will transform into different active states in a reducing or oxidizing environment. Furthermore, the amorphous material drives oxygen evolution reaction (OER) through the lattice oxygen oxidation mechanism (LOM), while LOM can effectively bypass the adsorption of strongly related intermediates in the adsorbate release mechanism, thus promoting OER procedure in a timely manner. As a result, CeO2/NiFeCo exhibits a lower oxygen evolution overpotential of 260 mV at 10 mA cm-2current density, which shows a predatorily competitive advantage compared with commercially available RuO2and the reported catalysts.
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Affiliation(s)
- Huanhuan You
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Bo Wang
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Yuanzhe Wang
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Yunpeng Cao
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Kuo Wei
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, People's Republic of China
| | - Faming Gao
- Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, People's Republic of China
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39
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Guadix‐Montero S, Santos Hernandez A, Lei N, Morgan DJ, He Q, Wang A, Zhang T, Roldan A, Sankar M. Controlling the Selectivity of Supported Ru Nanoparticles During Glycerol Hydrogenolysis: C−O
vs
C−C Cleavage. ChemCatChem 2021. [DOI: 10.1002/cctc.202001881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Susana Guadix‐Montero
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
| | - Alba Santos Hernandez
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
| | - Nian Lei
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian Liaoning 116023 P. R. China
| | - David J. Morgan
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
| | - Qian He
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
- Department of Materials Science and Engineering National University of Singapore Singapore 117575 Singapore
| | - Aiqin Wang
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian Liaoning 116023 P. R. China
- Dalian National Laboratory for Clean Energy 457 Zhongshan Road Dalian 116023 P. R. China
| | - Tao Zhang
- State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road, Dalian Liaoning 116023 P. R. China
| | - Alberto Roldan
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
| | - Meenakshisundaram Sankar
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Cardiff CF10 3AT United Kingdom
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40
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Borophene-supported single transition metal atoms as potential oxygen evolution/reduction electrocatalysts: a density functional theory study. J Mol Model 2021; 27:67. [PMID: 33537857 DOI: 10.1007/s00894-021-04693-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/24/2021] [Indexed: 01/08/2023]
Abstract
Due to the maximal atom utilization, high activity, and selectivity, the two-dimensional (2D) matrix supported single-atom catalysts (SACs) have attracted substantial research interests. In this work, we carried out the theoretical study on the stability, activity for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), and its dependence on the electronic structure of transition metal (TM) anchored on two types of borophene (called β12 and χ3) by density functional theory (DFT) calculations. The results show that the early- and VIII-TM anchored β12 and χ3 borophenes are structurally and thermodynamically stable. The overpotentials of OER (ηOER) over the Ni supported on β12 and χ3 borophene SACs, designated as β12-Ni and χ3-Ni, are 0.38 and 0.35 V, respectively. The ηORR of β12-Ni and χ3-Ni are estimated to be as low as 0.34 and 0.39 V, respectively. The OER/ORR activity of the SACs can be well correlated with their electronic structures. The high ηOER values of early TM supported on borophene SACs correspond to high d-band center of TM. Both β12-Ni and χ3-Ni have a moderate d-band center. Since the overpotentials for OER and ORR on β12-Ni and χ3-Ni are comparable to those of Pt group metals and their oxides, β12-Ni and χ3-Ni can be considered as the promising bifunctional catalysts for OER and ORR.
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41
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Zhou Y, Gao G, Chu W, Wang LW. Transition-metal single atoms embedded into defective BC 3 as efficient electrocatalysts for oxygen evolution and reduction reactions. NANOSCALE 2021; 13:1331-1339. [PMID: 33410443 DOI: 10.1039/d0nr07580a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Searching for high-activity, stable and low-cost catalysts toward oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are of significant importance to the development of renewable energy technologies. By using the computational screening method based on the density functional theory (DFT), we have systematically studied a wide range of transition metal (TM) atoms doped a defective BC3 monolayer (B atom vacancy VB and C atom vacancy VC), denoted as TM@VB and TM@VC (TM = Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ir and Pt), as efficient single atom catalysts for OER and ORR. The calculated results show that all the considered TM atoms can tightly bind with the defective BC3 monolayers to prevent the atomically dispersed atoms from clustering. The interaction strength between intermediates (HO*, O* and HOO*) and catalyst govern the catalytic activities of OER and ORR, which has a direct correlation with the d-band center (εd) of the TM active site that can be tuned by adjusting TM atoms with various d electron numbers. For TM@VB catalysts, it was found that the best catalyst for OER is Co@VB with an overpotential ηOER of 0.43 V, followed by Rh@VB (ηOER = 0.49 V), while for ORR, Rh@VB exhibits the lowest overpotential ηORR of 0.40 V, followed by Pd@VB (ηORR = 0.45 V). For TM@VC catalysts, the best catalyst for OER is Ni@VC (ηOER = 0.47 V), followed by Pt@VC (ηOER = 0.53 V), and for ORR, Pd@VC exhibits the highest activity with ηORR of 0.45 V. The results suggest that the high activity of the newly predicted well dispersed Rh@VB SAC is comparable to that of noble metal oxide benchmark catalysts for both OER and ORR. Importantly, Rh@VB may remain stable against dissolution at pH = 0 condition. The high energy barrier prevents the isolated Rh atom from clustering and ab initio molecule dynamic simulation (AIMD) result suggests that Rh@VB can remain stable under 300 K, indicating its kinetic stability. Our findings highlight a novel family of efficient and stable SAC based on carbon material, which offer a useful guideline to screen the metal active site for catalyst designation.
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Affiliation(s)
- Yanan Zhou
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, Sichuan, China. and Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, 94720, California, USA.
| | - Guoping Gao
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, 94720, California, USA.
| | - Wei Chu
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, Sichuan, China.
| | - Lin-Wang Wang
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, 94720, California, USA.
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42
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Lv H, Wei R, Guo X, Sun L, Liu B. Synergistic Catalysis of Binary RuP Nanoclusters on Nitrogen-Functionalized Hollow Mesoporous Carbon in Hydrogen Production from the Hydrolysis of Ammonia Borane. J Phys Chem Lett 2021; 12:696-703. [PMID: 33399470 DOI: 10.1021/acs.jpclett.0c03547] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Exploring highly efficient nanocatalysts for hydrogen (H2) production from catalytic hydrolysis of ammonia borane (AB) under ambient conditions and further unveiling their catalytic mechanism are of critical importance for renewable energy conversion technologies but remain big challenges. Herein, ultrafine binary RuP alloy nanoclusters homogeneously encapsulated onto nitrogen-functionalized hollow mesoporous carbon supports (RuP@NHMCs) are reported as a high-performance platinum (Pt)-free nanocatalyst for catalytic hydrolysis of AB at room temperature. Remarkable catalytic activity with a very high turnover frequency of 1774 molH2 molRu-1 min-1 and a low activation energy of 36.3 kJ mol-1 is observed based on compositional and structural synergies of RuP@NHMCs. Results of control experiments and catalytic kinetics studies reveal that the rate-determining step of catalytic hydrolysis of AB is the oxidation cleavage of a covalently stable H-OH bond, while RuP@NHMCs result in multiple electronic, functional, size, and support effects that kinetically accelerate the cleavage of attacked H-OH. Furthermore, RuP@NHMCs exhibit a good catalytic activity with a high yield of >99% for tandem hydrogenation of nitroarenes coupled with the hydrolysis of AB. We strongly believe that the catalyst design principle reported here could provide a new opportunity for synthesizing other Pt-free high-performance nanocatalysts.
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Affiliation(s)
- Hao Lv
- College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Ren Wei
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Xuwen Guo
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Lizhi Sun
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
| | - Ben Liu
- College of Chemistry, Sichuan University, Chengdu 610064, China
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China
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43
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Porkovich AJ, Kumar P, Ziadi Z, Lloyd DC, Weng L, Jian N, Sasaki T, Sowwan M, Datta A. Defect-assisted electronic metal-support interactions: tuning the interplay between Ru nanoparticles and CuO supports for pH-neutral oxygen evolution. NANOSCALE 2021; 13:71-80. [PMID: 33350421 DOI: 10.1039/d0nr06685k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Electronic metal-support interactions (EMSIs) comprise an area of intense study, the manipulation of which is of paramount importance in the improvement of heterogeneous metal nanoparticle (NP) supported catalysts. EMSI is the transfer of charge from the support to NP, enabling more effective adsorption and interaction of reactants during catalysis. Ru NPs on CuO supports show different levels of EMSI (via charge transfer) depending on their crystal structure, with multiple twinned NPs showing greater potential for EMSI. We use magnetron-assisted gas phase aggregation for the synthesis of batches of Ru NPs with different populations of single crystal and multiple twinned nanoparticles, which were deposited on CuO nanowires (NWs). The surface charging of the Ru-CuO catalysts was investigated by Kelvin probe force microscopy (KPFM) and X-ray photoelectron spectroscopy (XPS). By doubling the population of multiple twinned NPs, the surface potential of the Ru-CuO catalysts increases roughly 4 times, coinciding with a similar increase in the amount of Ru4+. Therefore, tuning the amount of EMSI in a catalyst is possible through changing the population of multiple twinned Ru NPs in the catalyst. Increasing the amount of multiple twin NPs resulted in improved activity in the oxygen evolution reaction (a roughly 2.5 times decrease in the overpotentials when the population of multiple twinned NPs is increased) and better catalyst stability. This improvement is attributed to the fact that the multiple twin NPs maintained a metallic character under oxidation conditions (unlike single crystal NPs) due to the EMSI between the NP and support.
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Affiliation(s)
- Alexander J Porkovich
- Okinawa Institute of Science and Technology (OIST) Graduate University, 1919-1 Tancha, Onna-Son, Okinawa 904-0495, Japan.
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44
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Niu X, Zhu Q, Jiang S, Zhang Q. Photoexcited Electron Dynamics of Nitrogen Fixation Catalyzed by Ruthenium Single-Atom Catalysts. J Phys Chem Lett 2020; 11:9579-9586. [PMID: 33119324 DOI: 10.1021/acs.jpclett.0c02833] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
It is still a grand challenge to exploit efficient catalysts to achieve sustainable photocatalytic N2 reduction under ambient conditions. Here, we developed a ruthenium-based single-atom catalyst anchored on defect-rich TiO2 nanotubes (denoted Ru-SAs/Def-TNs) as a model system for N2 fixation. The constructed Ru-SAs/Def-TNs exhibited a catalytic efficiency of 125.2 μmol g-1 h-1, roughly 6 and 13 times higher than those of the supported Ru nanoparticles and Def-TNs, respectively. Through ultrafast transient absorption and photoluminescence spectroscopy, we revealed the relationship between catalytic activity and photoexcited electron dynamics in such a model SA catalytic system. The unique ligand-to-metal charge-transfer state formed in Ru-SAs/Def-TNs was found to be responsible for its high catalytic activity because it can greatly promote the transfer of photoelectrons from Def-TNs to the Ru-SAs center and the subsequent capture by Ru-SAs. This work sheds light on the origin of the high performance of SA catalysts from the perspective of photoexcited electron dynamics and hence enriches the mechanistic understanding of SA catalysis.
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Affiliation(s)
- Xiaoyou Niu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Qing Zhu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shenlong Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Qun Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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45
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Shah SA, Zhu G, Yuan A, Ullah N, Shen X, Khan H, Xu K, Wang X, Yan X. Loading of individual Se-doped Fe 2O 3-decorated Ni/NiO particles on carbon cloth: facile synthesis and efficient electrocatalysis for the oxygen evolution reaction. Dalton Trans 2020; 49:15682-15692. [PMID: 33124630 DOI: 10.1039/d0dt03094e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of competitive, affordable and sustainable electrocatalysts via simple and scalable methods is highly desirable for the oxygen evolution reaction (OER). Usually, expensive, complex, time-consuming methods are applied to prepared suitable electrocatalysts for the OER. In contrast, a single-step thermal method is simple and inexpensive. Nickel and iron-based composite materials are potential candidates as OER catalysts. Accordingly, herein, Se-doped Fe2O3-decorated Ni/NiO particles on carbon cloth (Se-Fe2O3@Ni/NiO/CC) were synthesized via a facile and scalable one-step thermal method. The individual Se-Fe2O3@Ni/NiO particles were accommodated in holes in the carbon fibers of CC. The optimized Se-Fe2O3@Ni/NiO/CC-2 sample exhibited an outstanding OER performance with an overpotential of 205 mV at the current density 10 mA cm-2, small Tafel slope of 36 mV dec-1, and good stability in 1.0 M KOH electrolyte. The outstanding catalytic performance was mainly attributed to the heterointerfaces between Se-Fe2O3 and Se-Ni/NiO. Moreover, the accommodation of the Se-Fe2O3@Ni/NiO particles in the holes of CC restricted the aggregation of the particles, and CC provided a conductive substrate for the OER process. Thus, this work provides a simple, scalable and effective strategy for designing and engineering of outstanding electrocatalysts for the OER.
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Affiliation(s)
- Sayyar Ali Shah
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China.
| | - Guoxing Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Aihua Yuan
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China.
| | - Nabi Ullah
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Xiaoping Shen
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Habib Khan
- School of Chemical Engineering and Technology, Xian Jiaotong University, Xian 710049, PR China
| | - Keqiang Xu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Xuyu Wang
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China.
| | - Xiufen Yan
- School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China.
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46
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Krishna Sadhanala H, Perelshtein I, Gedanken A. Boosting Electrocatalytic Hydrogen Evolution of Nickel foam Supported Nickel Hydroxide by Ruthenium Doping. ChemistrySelect 2020. [DOI: 10.1002/slct.202002906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Hari Krishna Sadhanala
- Bar Ilan Institute for Nanotechnology and Advanced MaterialsDepartment of Chemistry, Bar-Ilan University Ramat-Gan 5290002 Israel
| | - Ilana Perelshtein
- Bar Ilan Institute for Nanotechnology and Advanced MaterialsDepartment of Chemistry, Bar-Ilan University Ramat-Gan 5290002 Israel
| | - Aharon Gedanken
- Bar Ilan Institute for Nanotechnology and Advanced MaterialsDepartment of Chemistry, Bar-Ilan University Ramat-Gan 5290002 Israel
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47
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Cui X, Ren P, Ma C, Zhao J, Chen R, Chen S, Rajan NP, Li H, Yu L, Tian Z, Deng D. Robust Interface Ru Centers for High-Performance Acidic Oxygen Evolution. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1908126. [PMID: 32419157 DOI: 10.1002/adma.201908126] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 03/26/2020] [Accepted: 04/18/2020] [Indexed: 06/11/2023]
Abstract
RuO2 is considered as the state-of-the-art electrocatalyst for the oxygen evolution reaction (OER) in acidic media. However, its practical application is largely hindered by both the high reaction overpotential and severe electrochemical corrosion of the active centers. To overcome these limitations, innovative design strategies are necessary, which remains a great challenge. Herein, robust interface Ru centers between RuO2 and graphene, via a controllable oxidation of graphene encapsulating Ru nanoparticles, are presented to efficiently enhance both the activity and stability of the acidic OER. Through precisely controlling the reaction interface, a much lower OER overpotential of only 227 mV at 10 mA cm-2 in acidic electrolyte, compared with that of 290 mV for commercial RuO2 , but a significantly higher durability than the commercial RuO2 , are achieved. Density functional theory (DFT) calculations reveal that the interface Ru centers between the RuO2 and the graphene can break the classic scaling relationships between the free energies of HOO* and HO* to reduce the limiting potential, rendering an enhancement in the intrinsic OER activity and the resistance to over-oxidation and corrosion for RuO2 .
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Affiliation(s)
- Xiaoju Cui
- Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Pengju Ren
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
| | - Chao Ma
- Center for High Resolution Electron Microscopy, College of Materials Science and Engineering, Hunan University, Changsha, 410082, China
| | - Jia Zhao
- State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Ruixue Chen
- Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Shiming Chen
- State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - N Pethan Rajan
- State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Haobo Li
- State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Liang Yu
- State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Zhongqun Tian
- Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Dehui Deng
- Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
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48
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Operando identification of site-dependent water oxidation activity on ruthenium dioxide single-crystal surfaces. Nat Catal 2020. [DOI: 10.1038/s41929-020-0457-6] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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49
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Aizaz Ud Din M, Irfan S, Dar SU, Rizwan S. Synthesis of 3D IrRuMn Sphere as a Superior Oxygen Evolution Electrocatalyst in Acidic Environment. Chemistry 2020; 26:5662-5666. [PMID: 32078744 DOI: 10.1002/chem.201905063] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 02/10/2020] [Indexed: 12/17/2022]
Abstract
The design of a three-dimensional structure for an Ir-based catalyst offers a great opportunity to improve the electrocatalytic performance and maximize the use of the precious metal. Herein, a novel wet chemical strategy is reported for the synthesis of an IrRuMn catalyst with a sphere structure and porous features. In the synthetic process, the combined use of citric acid and formamide is requisite for the formation of the sphere structure. This method leads to a favorable 3D IrRuMn sphere structure with many fully exposed active sites. Furthermore, an alloying noble metal, such as Ir or Ru, with the transition metal leads to enhanced oxygen evolution reaction (OER) activity. The doping of a transition metal, such as Mn, is an interesting example, because it exhibits stability and activity in both acidic and alkaline media. For the OER, the IrRuMn sphere catalyst exhibits an overpotential of 260 mV at a current density of 10 mA cm-2 in strongly acidic 0.1 m HClO4 , which is superior to that of a commercial IrO2 /C catalyst. This approach provides a novel way to synthesize an Ir-based multimetallic spherical electrocatalyst, which exhibits exceptional efficiency for the acidic OER. It will pave the way for new approaches to the practical utilization of PEM electrolyzers.
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Affiliation(s)
- Muhammad Aizaz Ud Din
- Shenzhen Key Laboratory on Power Battery Safety Research and, Shenzhen Geim Graphene Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China
| | - Syed Irfan
- Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.,Key Laboratory of Optoelectronic Devices and, Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Sami Ullah Dar
- Department of Chemistry, Guangdong Technion Israel Institute of Technology, Shantou, Guangdong, P. R. China
| | - Syed Rizwan
- Physics Characterization and Simulations Lab (PCSL), School of Natural Sciences (SNS), National University of Science and Technology (NUST), Islamabad, 44000, Pakistan
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50
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Kazim AH, Khan MB, Nazir R, Shabbir A, Abbasi MS, Abdul Rab H, Shahid Qureishi N. Effects of oxyhydrogen gas induction on the performance of a small-capacity diesel engine. Sci Prog 2020; 103:36850420921685. [PMID: 32478642 PMCID: PMC10358467 DOI: 10.1177/0036850420921685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
Compression ignition engines are one of the world's largest consumers of fossil oil but have energy extraction efficiency limited to 35%. Addition of hydrogen alongside diesel fuel has been found to improve engine performance and efficiency; however, after a certain limit, hydrogen begins to show adverse effects, mainly because the ratio of oxygen to fuel decreases. This can be overcome by using oxyhydrogen, which is a mixture of hydrogen and oxygen gas. In this study, effects of addition of oxyhydrogen generated by electrolysis, with varying flows at the intake manifold, on a 315 cc compression ignition engine alongside diesel were analyzed. The engine was mounted on a Thepra test bed and torque measurements were taken at predetermined test points for diesel and 6 and 10 standard cubic feet per hour flowrates of oxyhydrogen. H10 showed the maximum improvement in engine performance equating to a 22.4% increase in both torque and power at 3000 r/min, and a 19.4% increase in efficiency at 2600 r/min was recorded. The large increase in engine performance as compared to previous results is because of high oxyhydrogen flowrate to displacement volume ratio. The oxyhydrogen flowrate to displacement ratio is the most important factor as it is directly impacts engine performance. The difference in engine performance because of oxyhydrogen becomes prominent at higher engine speed due to high suction pressure. No experimental flowrates of oxyhydrogen showed any adverse effect on the engine performance.
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Affiliation(s)
- Ali Hussain Kazim
- Department of Mechanical Engineering, University of Engineering and Technology, Lahore, Pakistan
| | - Muhammad Bilal Khan
- Department of Mechanical Engineering, University of Engineering and Technology, Lahore, Pakistan
| | - Rabia Nazir
- Department of Electrical Engineering, University of Engineering and Technology, Lahore, Pakistan
| | - Aqsa Shabbir
- Department of Electrical Engineering, Lahore College for Women University, Lahore, Pakistan
| | - Muhammad Salman Abbasi
- Department of Mechanical Engineering, University of Engineering and Technology, Lahore, Pakistan
| | - Hamza Abdul Rab
- Department of Mechanical Engineering, University of Engineering and Technology, Lahore, Pakistan
| | - Nabeel Shahid Qureishi
- Department of Mechanical Engineering, University of Engineering and Technology, Lahore, Pakistan
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