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Teli AM, Mishra RK, Shin JC, Jeon W. Exploring the Capability of Cu-MoS 2 Catalysts for Use in Electrocatalytic Overall Water Splitting. MICROMACHINES 2024; 15:876. [PMID: 39064387 PMCID: PMC11279013 DOI: 10.3390/mi15070876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Revised: 06/30/2024] [Accepted: 07/01/2024] [Indexed: 07/28/2024]
Abstract
Herein, we prepare MoS2 and Cu-MoS2 catalysts using the solvothermal method, a widely accepted technique for electrocatalytic overall water-splitting applications. TEM and SEM images, standard tools in materials science, provide a clear view of the morphology of Cu-MoS2. HRTEM analysis, a high-resolution imaging technique, confirms the lattice spacing, lattice plane, and crystal structure of Cu-MoS2. HAADF and corresponding color mapping and advanced imaging techniques reveal the existence of the Cu-doping, Mo, and S elements in Cu-MoS2. Notably, Cu plays a crucial role in improving the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) of the Cu-MoS2 catalyst as compared with the MoS2 catalyst. In addition, the Cu-MoS2 catalyst demonstrates significantly lower overpotential (167.7 mV and 290 mV) and Tafel slopes (121.5 mV dec-1 and 101.5 mV dec-1), standing at -10 mA cm-2 and 10 mA cm-2 for HER and OER, respectively, compared to the MoS2 catalyst. Additionally, the Cu-MoS2 catalyst displays outstanding stability for 12 h at -10 mA cm-2 of HER and 12 h at 10 mA cm-2 of OER using chronopotentiaometry. Interestingly, the Cu-MoS2‖Cu-MoS2 cell displays a lower cell potential of 1.69 V compared with the MoS2‖MoS2 cell of 1.81 V during overall water splitting. Moreover, the Cu-MoS2‖Cu-MoS2 cell shows excellent stability when using chronopotentiaometry for 18 h at 10 mA cm-2.
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Affiliation(s)
- Aviraj M. Teli
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea; (A.M.T.); (J.C.S.)
| | - Rajneesh Kumar Mishra
- Department of Physics, Yeungnam University, Gyeongsan 38541, Gyeongbuk, Republic of Korea
| | - Jae Cheol Shin
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea; (A.M.T.); (J.C.S.)
| | - Wookhee Jeon
- Department of Semiconductor, Convergence Engineering, Sungkyunkwan University, Suwon 16419, Gyeonggi, Republic of Korea
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2
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Kundu D, Hazra A, Bhattacharjee S, Dutta J, Murmu NC, Bhaumik A, Banerjee P. Integration of a Bismuth-Based Tris-Mononuclear Complex with 2D Functional Materials for Highly Efficient and Durable Aqueous Electrocatalytic Hydrogen Evolution. ACS APPLIED MATERIALS & INTERFACES 2024; 16:28423-28434. [PMID: 38767841 DOI: 10.1021/acsami.4c02234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
The eminence of transitioning from traditional fossil fuel-based energy resources to renewable and sustainable energy sources is most evidently crucial. The potential of hydrogen as an alternative energy source has specifically focuses the electrocatalytic water splitting (EWS) as a promising technique for generating hydrogen. Development of efficient electrocatalysts to facilitate the EWS process while rationalizing the limitations of noble metal catalysts like platinum has become one of the daunting tasks. Consequently, porous functional materials such as metal complexes (MCs) and graphene oxide (GO) can act as potential catalysts for EWS. Therefore, a composite of GO and a mononuclear bismuth metal complex is synthesized through in situ facile synthesis, which is further utilized as an efficient electrocatalyst for the hydrogen evolution reaction (HER). Several potential electrocatalytic MC@GO composite (BMGO-3,5,7) materials were prepared with compositional variation of GO (3, 5, and 7 wt %). The experimental results demonstrate that the BMGO5 composite exhibits excellent HER activity with a low overpotential value of 105 mV at 10 mA cm-2 and a low Tafel slope of 44 mV dec-1 in 1 M KOH solution. Furthermore, a comprehensive investigation on the potentiality of the BMC-GO composite for hydrogen evolution from river water splitting was performed in order to address the issue of freshwater depletion. Inclusion of a mononuclear MC for facile synthesis of functional GO-based efficient electrocatalyst material is very scanty in the literature. This unique approach could assist future research endeavors toward designing efficient electrocatalysts for sustainable renewable energy generation. This is one of the first of its kind, where mononuclear MCs were utilized to develop GO-based functional composite materials for efficient electrocatalysis toward sustainable renewable energy generation.
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Affiliation(s)
- Debojyoti Kundu
- Electric Mobility and Tribology Research Group, CSIR─Central Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur, West Bengal 713209, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Abhijit Hazra
- Electric Mobility and Tribology Research Group, CSIR─Central Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur, West Bengal 713209, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Sudip Bhattacharjee
- School of Materials Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Joydip Dutta
- Central Research Facility, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India
| | - Naresh Chandra Murmu
- Electric Mobility and Tribology Research Group, CSIR─Central Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur, West Bengal 713209, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Asim Bhaumik
- School of Materials Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Priyabrata Banerjee
- Electric Mobility and Tribology Research Group, CSIR─Central Mechanical Engineering Research Institute (CMERI), Mahatma Gandhi Avenue, Durgapur, West Bengal 713209, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
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3
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Liu Y, Zhang M, Zhang C, Zhang H, Wang H. An IrRuO x catalyst supported by oxygen-vacant Ta oxide for the oxygen evolution reaction and proton exchange membrane water electrolysis. NANOSCALE 2024. [PMID: 38682643 DOI: 10.1039/d3nr06211b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
The sustainable development of proton exchange membrane water electrolysis (PEMWE) requires a dramatic reduction in Ir while maintaining good catalytic activity and stability for the oxygen evolution reaction (OER). Herein, high-surface-area Ta2O5 with abundant oxygen vacancies is synthesized via a facile process, followed by anchoring IrRuOx onto a Ta2O5 support (IrRuOx/Ta2O5). IrRuOx and Ta2O5 work synergistically to afford excellent catalytic performance for the acidic OER. At 0.3 mgIr cm-2, IrRuOx/Ta2O5 only needed an overpotential of 235 mV to deliver 10 mA cm-2 in an acidic half cell and needed a cell potential of 1.91 V to deliver 2 A cm-2 in a PEM water electrolyzer. The characterization results show that doping Ir into RuOx significantly improves the stability and the electrochemically active surface area of RuOx. In IrRuOx/Ta2O5, IrRuOx interacts with Ta2O5 through more electron-rich Ir, indicating strong synergy between the catalyst and the support. The use of a metal oxide support improves the catalyst dispersion, optimizes electronic structures, facilitates mass transport, and stabilizes active sites. This work demonstrates that compositing Ir with less expensive Ru and anchoring catalyst nanoparticles on platinum-group metal (PGM)-free metal oxide supports represents one of the most promising strategies to reduce Ir loading and achieve an activity-stability trade-off. Such a strategy can benefit future catalyst design for other energy storage and conventional processes.
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Affiliation(s)
- Yanrong Liu
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Longzihu New Energy Laboratory, Zhengzhou Institute of Emerging Industrial Technology, Henan University, Zhengzhou 450000, China
| | - Meiqi Zhang
- Longzihu New Energy Laboratory, Zhengzhou Institute of Emerging Industrial Technology, Henan University, Zhengzhou 450000, China
| | - Cong Zhang
- SINOPEC Research Institute of Petroleum Processing Co., Ltd, Beijing 100083, China
| | - Honghua Zhang
- Longzihu New Energy Laboratory, Zhengzhou Institute of Emerging Industrial Technology, Henan University, Zhengzhou 450000, China
| | - Hao Wang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Longzihu New Energy Laboratory, Zhengzhou Institute of Emerging Industrial Technology, Henan University, Zhengzhou 450000, China
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4
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Quan L, Jiang H, Mei G, Sun Y, You B. Bifunctional Electrocatalysts for Overall and Hybrid Water Splitting. Chem Rev 2024; 124:3694-3812. [PMID: 38517093 DOI: 10.1021/acs.chemrev.3c00332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Electrocatalytic water splitting driven by renewable electricity has been recognized as a promising approach for green hydrogen production. Different from conventional strategies in developing electrocatalysts for the two half-reactions of water splitting (e.g., the hydrogen and oxygen evolution reactions, HER and OER) separately, there has been a growing interest in designing and developing bifunctional electrocatalysts, which are able to catalyze both the HER and OER. In addition, considering the high overpotentials required for OER while limited value of the produced oxygen, there is another rapidly growing interest in exploring alternative oxidation reactions to replace OER for hybrid water splitting toward energy-efficient hydrogen generation. This Review begins with an introduction on the fundamental aspects of water splitting, followed by a thorough discussion on various physicochemical characterization techniques that are frequently employed in probing the active sites, with an emphasis on the reconstruction of bifunctional electrocatalysts during redox electrolysis. The design, synthesis, and performance of diverse bifunctional electrocatalysts based on noble metals, nonprecious metals, and metal-free nanocarbons, for overall water splitting in acidic and alkaline electrolytes, are thoroughly summarized and compared. Next, their application toward hybrid water splitting is also presented, wherein the alternative anodic reactions include sacrificing agents oxidation, pollutants oxidative degradation, and organics oxidative upgrading. Finally, a concise statement on the current challenges and future opportunities of bifunctional electrocatalysts for both overall and hybrid water splitting is presented in the hope of guiding future endeavors in the quest for energy-efficient and sustainable green hydrogen production.
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Affiliation(s)
- Li Quan
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Hui Jiang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Guoliang Mei
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Yujie Sun
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Bo You
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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5
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Amthor S, Ranu K, Bellido CG, Salomón FF, Piccioni A, Mazzaro R, Boscherini F, Pasquini L, Gil-Sepulcre M, Llobet A. Robust Molecular Anodes for Electrocatalytic Water Oxidation Based on Electropolymerized Molecular Cu Complexes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2308392. [PMID: 37814460 DOI: 10.1002/adma.202308392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/17/2023] [Indexed: 10/11/2023]
Abstract
A multistep synthesis of a new tetra-amidate macrocyclic ligand functionalized with alkyl-thiophene moieties, 15,15-bis(6-(thiophen-3-yl)hexyl)-8,13-dihydro-5H-dibenzo[b,h][1,4,7,10]tetraazacyclotridecine-6,7,14,16(15H,17H)-tetraone, H4 L, is reported. The reaction of the deprotonated ligand, L4- , and Cu(II) generates the complex [LCu]2- , that can be further oxidized to Cu(III) with iodine to generate [LCu]- . The H4 L ligand and their Cu complexes have been thoroughly characterized by analytic and spectroscopic techniques (including X-ray Absorption Spectroscopy, XAS). Under oxidative conditions, the thiophene group of [LCu]2- complex polymerizes on the surface of graphitic electrodes (glassy carbon disks (GC), glassy carbon plates (GCp ), carbon nanotubes (CNT), or graphite felts (GF)) generating highly stable thin films. With CNTs deposited on a GC by drop casting, hybrid molecular materials labeled as GC/CNT@p-[LCu]2- are obtained. The latter are characterized by electrochemical techniques that show their capacity to electrocatalytically oxidize water to dioxygen at neutral pH. These new molecular anodes achieve current densities in the range of 0.4 mA cm-2 at 1.30 V versus NHE with an onset overpotential at ≈250 mV. Bulk electrolysis experiments show an excellent stability achieving TONs in the range of 7600 during 24 h with no apparent loss of catalytic activity and maintaining the molecular catalyst integrity, as evidenced by electrochemical techniques and XAS spectroscopy.
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Affiliation(s)
- Sebastian Amthor
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avinguda Països Catalans 16, Tarragona, 43007, Spain
| | - Koushik Ranu
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avinguda Països Catalans 16, Tarragona, 43007, Spain
| | - Carlos G Bellido
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avinguda Països Catalans 16, Tarragona, 43007, Spain
| | - Fernando F Salomón
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avinguda Països Catalans 16, Tarragona, 43007, Spain
| | - Alberto Piccioni
- Department of Physics and Astronomy, Alma Mater Studiorum - Università di Bologna, viale C. Berti Pichat 6/2, Bologna, 40127, Italy
| | - Raffaello Mazzaro
- Department of Physics and Astronomy, Alma Mater Studiorum - Università di Bologna, viale C. Berti Pichat 6/2, Bologna, 40127, Italy
| | - Federico Boscherini
- Department of Physics and Astronomy, Alma Mater Studiorum - Università di Bologna, viale C. Berti Pichat 6/2, Bologna, 40127, Italy
| | - Luca Pasquini
- Department of Physics and Astronomy, Alma Mater Studiorum - Università di Bologna, viale C. Berti Pichat 6/2, Bologna, 40127, Italy
| | - Marcos Gil-Sepulcre
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avinguda Països Catalans 16, Tarragona, 43007, Spain
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Avinguda Països Catalans 16, Tarragona, 43007, Spain
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, 08193, Spain
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6
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Hou R, Yang X, Su L, Cen W, Ye L, Sun D. Accelerating structure reconstruction to form NiOOH in metal-organic frameworks (MOFs) for boosting the oxygen evolution reaction. NANOSCALE 2023; 15:18858-18863. [PMID: 37966341 DOI: 10.1039/d3nr05051c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Structural reconstruction of electrocatalysts to generate metal hydroxide/oxyhydroxide species is critical for an efficient oxygen evolution reaction (OER), but the controllable regulation of the reconstruction process still remains a challenge. Given the designable nature of metal-organic frameworks (MOFs), herein, we have reported a localized structure disordering strategy to accelerate the structural reconstruction of Ni-BDC to generate NiOOH for boosting the OER. The Ni-BDC nanosheets were modified by Fe3+ and urea to form cracks, which could promote the accessibility of the Ni sites by the electrolyte and thus promote the reconstruction to form NiOOH. In addition, the interaction between Ni2+ and Fe3+ allows the electron flow from Ni2+ to Fe3+, further enhancing the NiOOH generation. As a result, the optimized sample exhibits excellent OER activity with a small overpotential of 251 mV at 10 mA cm-2, which is superior to most of the MOF-based OER catalysts reported previously. This work provides a controllable strategy to regulate the structural reconstruction for promoting the OER, which could provide important guidance for the development of more efficient OER electrocatalysts.
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Affiliation(s)
- Ruiyao Hou
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Xiaoxia Yang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Linghui Su
- Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu, P. R. China
| | - Wanglai Cen
- Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu, P. R. China
- National Engineering Research Centre for Flue Gas Desulfurization, Chengdu, P. R. China
| | - Lin Ye
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, P. R. China
| | - Dengrong Sun
- College of Carbon Neutrality Future Technology, Sichuan University, Chengdu, P. R. China.
- National Engineering Research Centre for Flue Gas Desulfurization, Chengdu, P. R. China
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7
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Gao X, Liu H, Wang Y, Guo J, Sun X, Sun W, Zhao H, Bai J, Li C. Tailoring the d-band electronic structure of deficient LaMn 0.3Co 0.7O 3-δ perovskite nanofibers for boosting oxygen electrocatalysis in Zn-Air batteries. J Colloid Interface Sci 2023; 650:951-960. [PMID: 37453319 DOI: 10.1016/j.jcis.2023.07.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/24/2023] [Accepted: 07/02/2023] [Indexed: 07/18/2023]
Abstract
The development and design of efficient bifunctional electrocatalysts towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are crucial for rechargeable Zinc-air batteries (ZABs). Optimizing the d-band structure of active metal center in perovskite oxides is an effective method to enhance ORR/OER activity by accelerating the rate-determining step. Herein, we report a deficient method to optimize the d-band structure of Co ions in LaMn0.3Co0.7O3-δ (LMCO-2) perovskite nanofibers, which regulates the mutual effect between B-site Co ions and reactive oxygen intermediates. It is proved by experiment and theoretical calculation that the d-band center (Md) of transition metal ions in LMCO-2 is moved up and the electron filling number of eg orbital in B site is 1.01, thus leading to the reduction of Gibbs free energy required for ORR rate-determining step (OH*→H2O*) to 0.22 eV and promoting reaction proceeds. In this manner, LMCO-2 showed good bifunctional oxygen electrocatalytic activity, with a half-wave potential of 0.71 V vs. RHE. Furthermore, the high specific capacity of 811.54 mAh g-1 and power density of 326.56 mW cm-2 were obtained by using LMCO-2 as the cathode catalyst for ZABs. This study proved the feasibility of d-band structure regulation to enhance the electrocatalytic activity of perovskite oxides.
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Affiliation(s)
- XinYu Gao
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, PR China; Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, PR China
| | - Huan Liu
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, PR China; Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, PR China.
| | - Yong Wang
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, PR China; Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, PR China
| | - JiaHui Guo
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, PR China; Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, PR China
| | - XingWei Sun
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, PR China; Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, PR China
| | - WeiYan Sun
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, PR China; Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, PR China
| | - Haitao Zhao
- ShenZhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, PR China
| | - Jie Bai
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, PR China; Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, PR China.
| | - ChunPing Li
- Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051, PR China; Inner Mongolia Key Laboratory of Industrial Catalysis, Hohhot 010051, PR China.
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8
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Skorupska M, Kowalska K, Tyc M, Ilnicka A, Szkoda M, Lukaszewicz JP. Exfoliated graphite with spinel oxide as an effective hybrid electrocatalyst for water splitting. RSC Adv 2023; 13:10215-10220. [PMID: 37006354 PMCID: PMC10065144 DOI: 10.1039/d3ra00589e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 03/21/2023] [Indexed: 04/03/2023] Open
Abstract
The aim of the conducted research was to develop hybrid nanostructures formed from MnCo2O4 and exfoliated graphite. Carbon added during the synthesis allowed for obtaining a well-distributed MnCo2O4 particle size with exposed active sites contributing to the increased electric conductivity. The influence of the weight ratios of carbon to a catalyst for hydrogen and oxygen evolution reactions was investigated. The new bifunctional catalysts for water splitting were tested in an alkaline medium with excellent electrochemical performance and very good working stability. The results for hybrid samples show better electrochemical performance compared to the pure MnCo2O4. The highest electrocatalytic activity was for sample MnCo2O4/EG (2/1), where the value of the overpotential was 1.66 V at 10 mA cm-2, and also for this sample a low value of Tafel slope (63 mV dec-1) was denoted.
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Affiliation(s)
- Malgorzata Skorupska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun Gagarina 7 87-100 Torun Poland
| | - Kinga Kowalska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun Gagarina 7 87-100 Torun Poland
| | - Magdalena Tyc
- Faculty of Chemistry, Nicolaus Copernicus University in Torun Gagarina 7 87-100 Torun Poland
| | - Anna Ilnicka
- Faculty of Chemistry, Nicolaus Copernicus University in Torun Gagarina 7 87-100 Torun Poland
| | - Mariusz Szkoda
- Faculty of Chemistry, Department of Chemistry and Technology of Functional Materials, Gdańsk University of Technology Narutowicza 11/12 80-233 Gdańsk Poland
- Advanced Materials Center, Gdańsk University of Technology Narutowicza 11/12 80-233 Gdańsk Poland
| | - Jerzy P Lukaszewicz
- Faculty of Chemistry, Nicolaus Copernicus University in Torun Gagarina 7 87-100 Torun Poland
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Torun Wilenska 4 87-100 Torun Poland
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9
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Al-Naggar AH, Shinde NM, Kim JS, Mane RS. Water splitting performance of metal and non-metal-doped transition metal oxide electrocatalysts. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Biswas R, Ahmed I, Manna P, Mahata P, Dhayal RS, Singh A, Lahtinen J, Haldar KK. Facile Fabrication of Ni 9 S 8 /Ag 2 S Intertwined Structures for Oxygen and Hydrogen Evolution Reactions. Chempluschem 2023; 88:e202200320. [PMID: 36625467 DOI: 10.1002/cplu.202200320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 12/17/2022] [Indexed: 12/24/2022]
Abstract
Here, we report the fabrication of the unique intertwined Ni9 S8 /Ag2 S composite structure with hexagonal shape from their molecular precursors by one-pot thermal decomposition. Various spectroscopic and microscopic techniques were utilized to confirm the Ni9 S8 /Ag2 S intertwined structure. Powder X-ray Powder Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis suggest that there is an enrichment of Ni9 S8 phase in Ni9 S8 /Ag2 S. The presence of Ag2 S in Ni9 S8 /Ag2 S improves the conductivity by reducing the interfacial energy and charge transfer resistance. When Ni9 S8 /Ag2 S is employed as an electrocatalyst for electrochemical oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) activity, it requires a low overpotential of 152 mV for HER and 277 mV for OER to obtain the geometrical current density of 10 mA cm-2 , which is definitely superior to that of its components Ni9 S8 and Ag2 S. This work provides a simple design route to develop an efficient and durable electrocatalyst with outstanding OER and HER performance and the present catalyst (Ni9 S8 /Ag2 S) deserves as a potential candidate in the field of energy conversion systems.
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Affiliation(s)
| | - Imtiaz Ahmed
- Department of Chemistry, Central University of Punjab, Bathinda, 151401, India
| | - Priyanka Manna
- Department of Chemistry, Jadavpur University, Kolkata, 700032, India
| | - Partha Mahata
- Department of Chemistry, Jadavpur University, Kolkata, 700032, India
| | - Rajendra S Dhayal
- Department of Chemistry, Central University of Punjab, Bathinda, 151401, India
| | - Amol Singh
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan
| | - Jouko Lahtinen
- Department of Applied Physics, Aalto University School of Science, 00076, Aalto, Finland
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11
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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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Sakata K, Amemiya K. Time- and Depth-Resolved Chemical State Analysis of the Surface-to-Subsurface Oxidation of Cu by X-ray Absorption Spectroscopy at Near Ambient Pressure. J Phys Chem Lett 2022; 13:9573-9580. [PMID: 36201653 DOI: 10.1021/acs.jpclett.2c02641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Metal surface oxidation is a well-known phenomenon, but the oxidation states of metal surfaces have not been observed in situ and in real time because most techniques obtaining surface chemical states require high-vacuum conditions. Here, we achieved the real-time, in situ observation of the initial stages of surface Cu oxidation using fluorescence-yield wavelength-dispersive X-ray absorption spectroscopy (XAS) in the soft X-ray region at sub-nanometer depth resolution. Further, the XAS data suggest a unique oxidation mechanism: CuO forms on the top surface, and subsequently, Cu2O forms in the subsurface layers (>1 nm from the surface), accompanied by the interdiffusion of Cu from the inner layer and that of Cu2O to the inner layer. The reported technique has applications for the analysis of surface phenomena at ambient pressure, especially oxidation processes, whose understanding is crucial in many fields, from chemistry to structural engineering.
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Affiliation(s)
- Kaoruho Sakata
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki305-0801, Japan
| | - Kenta Amemiya
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki305-0801, Japan
- Department of Materials Structure Science, SOKENDAI (The Graduate University for Advanced Studies), 1-1 Oho, Tsukuba, Ibaraki305-0801, Japan
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Kim KH, Kim KH, Choi W, Kim YM, Hong SH, Choi YH. Mapping the electrocatalytic water splitting activity of VO 2 across its insulator-to-metal phase transition. NANOSCALE 2022; 14:8281-8290. [PMID: 35583399 DOI: 10.1039/d2nr01515c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The electrocatalytic water splitting activity of V-based oxides has been rarely investigated, even though several polymorphs in VO2 are expected to exhibit different electrocatalytic activities depending on their crystal and electronic structures. The rutile structure of VO2(R), showing metallic character, is a good candidate for a new electrocatalyst since it undergoes insulator-to-metal transition (IMT) from the insulating VO2(M1) at a low temperature of 68 °C, and involves a substantially increased electrical conductivity by three orders of magnitude. The extensive improvements in the electrocatalytic activity for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) are confirmed when the IMT is induced where the overpotential (η10) is reduced from 1056 mV to 598 mV in the OER and 411 mV to 136 mV in the HER, respectively. This improvement is attributed to the increased electrochemically active surface area (ECSA), reduced charge transfer resistance, and increased electron density, driven by the IMT to the metallic VO2(R) phase.
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Affiliation(s)
- Kyeong-Ho Kim
- Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul 151-744, Republic of Korea
| | - Kyung-Hwan Kim
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongsan 38430, Gyeongbuk, Republic of Korea.
| | - Wooseon Choi
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Young-Min Kim
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seong-Hyeon Hong
- Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul 151-744, Republic of Korea
| | - Yun-Hyuk Choi
- School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongsan 38430, Gyeongbuk, Republic of Korea.
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