1
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Marsh P, Huang MH, Xia X, Tran I, Atanassov P, Cao H. Polarization Conforms Performance Variability in Amorphous Electrodeposited Iridium Oxide pH Sensors: A Thorough Surface Chemistry Investigation. SENSORS (BASEL, SWITZERLAND) 2024; 24:962. [PMID: 38339679 PMCID: PMC10856937 DOI: 10.3390/s24030962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/24/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024]
Abstract
Electrodeposited amorphous hydrated iridium oxide (IrOx) is a promising material for pH sensing due to its high sensitivity and the ease of fabrication. However, durability and variability continue to restrict the sensor's effectiveness. Variation in probe films can be seen in both performance and fabrication, but it has been found that performance variation can be controlled with potentiostatic conditioning (PC). To make proper use of this technique, the morphological and chemical changes affecting the conditioning process must be understood. Here, a thorough study of this material, after undergoing PC in a pH-sensing-relevant potential regime, was conducted by voltammetry, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Fitting of XPS data was performed, guided by raw trends in survey scans, core orbitals, and valence spectra, both XPS and UPS. The findings indicate that the PC process can repeatably control and conform performance and surface bonding to desired calibrations and distributions, respectively; PC was able to reduce sensitivity and offset ranges to as low as ±0.7 mV/pH and ±0.008 V, respectively, and repeat bonding distributions over ~2 months of sample preparation. Both Ir/O atomic ratios (shifting from 4:1 to over 4.5:1) and fitted components assigned hydroxide or oxide states based on the literature (low-voltage spectra being almost entirely with suggested hydroxide components, and high-voltage spectra almost entirely with suggested oxide components) trend across the polarization range. Self-consistent valence, core orbital, and survey quantitative trends point to a likely mechanism of ligand conversion from hydroxide to oxide, suggesting that the conditioning process enforces specific state mixtures that include both theoretical Ir(III) and Ir(IV) species, and raising the conditioning potential alters the surface species from an assumed mixture of Ir species to more oxidized Ir species.
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Affiliation(s)
- Paul Marsh
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA 92697, USA; (P.M.); (M.-H.H.)
| | - Mao-Hsiang Huang
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA 92697, USA; (P.M.); (M.-H.H.)
| | - Xing Xia
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA 92697, USA; (P.M.); (M.-H.H.)
| | - Ich Tran
- Irvine Materials Research Institute, University of California Irvine, Irvine, CA 92697, USA;
| | - Plamen Atanassov
- Department of Chemical and Biomolecular Engineering, University of California Irvine, Irvine, CA 92697, USA;
- Department of Materials Science and Engineering, University of California Irvine, Irvine, CA 92697, USA
| | - Hung Cao
- Department of Electrical Engineering and Computer Science, University of California Irvine, Irvine, CA 92697, USA; (P.M.); (M.-H.H.)
- Department of Biomedical Engineering, University of California Irvine, Irvine, CA 92697, USA
- Department of Computer Science, University of California Irvine, Irvine, CA 92697, USA
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2
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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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3
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Wang Q, Cheng Y, Tao HB, Liu Y, Ma X, Li DS, Yang HB, Liu B. Long-Term Stability Challenges and Opportunities in Acidic Oxygen Evolution Electrocatalysis. Angew Chem Int Ed Engl 2023; 62:e202216645. [PMID: 36546885 DOI: 10.1002/anie.202216645] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 12/24/2022]
Abstract
Polymer electrolyte membrane water electrolysis (PEMWE) has been regarded as a promising technology for renewable hydrogen production. However, acidic oxygen evolution reaction (OER) catalysts with long-term stability impose a grand challenge in its large-scale industrialization. In this review, critical factors that may lead to catalyst's instability in couple with potential solutions are comprehensively discussed, including mechanical peeling, substrate corrosion, active-site over-oxidation/dissolution, reconstruction, oxide crystal structure collapse through the lattice oxygen-participated reaction pathway, etc. Last but not least, personal prospects are provided in terms of rigorous stability evaluation criteria, in situ/operando characterizations, economic feasibility and practical electrolyzer consideration, highlighting the ternary relationship of structure evolution, industrial-relevant activity and stability to serve as a roadmap towards the ultimate application of PEMWE.
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Affiliation(s)
- Qilun Wang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, 637459, Singapore
| | - Yaqi Cheng
- School of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore
| | - Hua Bing Tao
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Yuhang Liu
- School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Xuehu Ma
- Liaoning Key Laboratory of Clean Utilisation of Chemical Resources, Institute of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Dong-Sheng Li
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China
| | - Hong Bin Yang
- School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Bin Liu
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, 637459, Singapore.,Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, 999077, China
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4
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Wu M, Li W, Zhu C, Wu W, Zhang L, Zheng T, Fu Y, Yuan L. Single‐Step Oxidation of Low‐Concentration Methane to Methanol in the Gaseous Phase Using Ceria‐Based Iridium‐Copper Catalysts. ChemistrySelect 2023. [DOI: 10.1002/slct.202204745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Mingwei Wu
- Laboratory of Clean Low-Carbon Energy, Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230026 China
| | - Wenzhi Li
- Laboratory of Clean Low-Carbon Energy, Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230026 China
- Institute of Energy, Hefei Comprehensive National Science Center Hefei 230031 China
| | - Chen Zhu
- Laboratory of Clean Low-Carbon Energy, Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230026 China
| | - Wenjian Wu
- Laboratory of Clean Low-Carbon Energy, Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230026 China
| | - Lulu Zhang
- National & Local Joint Engineering Research Center of Precision Coal Mining Anhui University of Science and Technology Huainan 232001 China
| | - Taimin Zheng
- National & Local Joint Engineering Research Center of Precision Coal Mining Anhui University of Science and Technology Huainan 232001 China
| | - Yan Fu
- National & Local Joint Engineering Research Center of Precision Coal Mining Anhui University of Science and Technology Huainan 232001 China
| | - Liang Yuan
- National & Local Joint Engineering Research Center of Precision Coal Mining Anhui University of Science and Technology Huainan 232001 China
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5
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Li N, Cai L, Gao G, Lin Y, Wang C, Liu H, Liu Y, Duan H, Ji Q, Hu W, Tan H, Qi Z, Wang LW, Yan W. Operando Direct Observation of Stable Water-Oxidation Intermediates on Ca 2-xIrO 4 Nanocrystals for Efficient Acidic Oxygen Evolution. NANO LETTERS 2022; 22:6988-6996. [PMID: 36005477 DOI: 10.1021/acs.nanolett.2c01777] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We report Ca2-xIrO4 nanocrystals exhibit record stability of 300 h continuous operation and high iridium mass activity (248 A gIr-1 at 1.5 VRHE) that is about 62 times that of benchmark IrO2. Lattice-resolution images and surface-sensitive spectroscopies demonstrate the Ir-rich surface layer (evolved from one-dimensional connected edge-sharing [IrO6] octahedrons) with high relative content of Ir5+ sites, which is responsible for the high activity and long-term stability. Combining operando infrared spectroscopy with X-ray absorption spectroscopy, we report the first direct observation of key intermediates absorbing at 946 cm-1 (Ir6+═O site) and absorbing at 870 cm-1 (Ir6+OO- site) on iridium-based oxides electrocatalysts, and further discover the Ir6+═O and Ir6+OO- intermediates are stable even just from 1.3 VRHE. Density functional theory calculations indicate the catalytic activity of Ca2IrO4 is enhanced remarkably after surface Ca leaching, and suggest IrOO- and Ir═O intermediates can be stabilized on positive charged active sites of Ir-rich surface layer.
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Affiliation(s)
- Na Li
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
- Department of Materials Science and Engineering, National University of Singapore, 117575 Singapore
| | - Liang Cai
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, National University of Singapore, 117575 Singapore
| | - Guoping Gao
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics, School of Physics, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Yue Lin
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Chao Wang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Hengjie Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Yuying Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Hengli Duan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Qianqian Ji
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Wei Hu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Hao Tan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Zeming Qi
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
| | - Lin-Wang Wang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Wensheng Yan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, China
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6
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Czioska S, Ehelebe K, Geppert J, Escalera-López D, Boubnov A, Saraçi E, Mayerhöfer B, Krewer U, Cherevko S, Grunwaldt JD. Heating up the OER: Investigation of IrO2 OER catalysts as function of potential and temperature. ChemElectroChem 2022. [DOI: 10.1002/celc.202200514] [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)
- Steffen Czioska
- Karlsruher Institut für Technologie Institute for Chemical Technology and Polymer Chemistry Engesserstraße 20 76131 Karlsruhe GERMANY
| | - Konrad Ehelebe
- Forschungszentrum Jülich GmbH: Forschungszentrum Julich GmbH Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy GERMANY
| | - Janis Geppert
- Karlsruher Institut für Technologie: Karlsruher Institut fur Technologie Institute for Applied Materials—Electrochemical Technologies GERMANY
| | - Daniel Escalera-López
- Forschungszentrum Jülich GmbH: Forschungszentrum Julich GmbH Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy GERMANY
| | - Alexey Boubnov
- Karlsruher Institut für Technologie: Karlsruher Institut fur Technologie Institute for Chemical Technology and Polymer Chemistry GERMANY
| | - Erisa Saraçi
- Karlsruher Institut für Technologie: Karlsruher Institut fur Technologie Institute for Chemical Technology and Polymer Chemistry GERMANY
| | - Britta Mayerhöfer
- Forschungszentrum Jülich GmbH: Forschungszentrum Julich GmbH Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy GERMANY
| | - Ulrike Krewer
- Karlsruher Institut für Technologie: Karlsruher Institut fur Technologie Institute for Applied Materials—Electrochemical Technologies GERMANY
| | - Serhiy Cherevko
- Forschungszentrum Jülich GmbH: Forschungszentrum Julich GmbH Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy GERMANY
| | - Jan-Dierk Grunwaldt
- Karlsruher Institut für Technologie: Karlsruher Institut fur Technologie Institute for Chemical Technology and Polymer Chemistry GERMANY
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7
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Chen Y, Compton R. A Calibration-Free pH Sensor Using an In-Situ Modified Ir Electrode for Bespoke Application in Seawater. SENSORS 2022; 22:s22093286. [PMID: 35590977 PMCID: PMC9102169 DOI: 10.3390/s22093286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/13/2022] [Accepted: 04/13/2022] [Indexed: 02/04/2023]
Abstract
A bespoke calibration-free pH sensor using an in situ modified Ir electrode for applications in seawater is reported. The electrochemical behaviour of an iridium wire in air-saturated synthetic seawater was studied and the formation of pH-sensitive surface layers was observed that featured three pH-sensitive redox couples, Ir(III/IV), IrOxOI−/IrOxOII−H, and Hupd/H+, where Hupd is adsorbed hydrogen deposited at underpotential conditions. The amperometric properties of the electrochemically activated Ir wire were investigated using linear sweep voltammetry first, followed, second, by square wave voltammetry with the formation conditions in seawater for the optimal pH sensitivity of the redox couples identified. The sensor was designed to be calibration-free by measuring the “super-Nernstian” response, in excess of ca 60 mV per pH unit, of Ir(III/IV) relative to the less sensitive upd H oxidation signal with the pH reported on the total pH scale. The pH dependency of the optimised sensor was 70.1 ± 1.4 mV per pH unit at 25 °C, showing a super-Nernstian response of high sensitivity.
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Affiliation(s)
| | - Richard Compton
- Correspondence: ; Tel.: +44-(0)-1865-275957; Fax: +44-(0)-1865-275-410-1
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8
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Lončar A, Escalera‐López D, Cherevko S, Hodnik N. Inter‐relationships between Oxygen Evolution and Iridium Dissolution Mechanisms. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114437] [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]
Affiliation(s)
- Anja Lončar
- Laboratory for Electrocatalysis Department of Materials Chemistry National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
- University of Nova Gorica Vipavska 13 5000 Nova Gorica Slovenia
| | - Daniel Escalera‐López
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy Forschungszentrum Jülich Cauerstrasse 1 91058 Erlangen Germany
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy Forschungszentrum Jülich Cauerstrasse 1 91058 Erlangen Germany
| | - Nejc Hodnik
- Laboratory for Electrocatalysis Department of Materials Chemistry National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
- University of Nova Gorica Vipavska 13 5000 Nova Gorica Slovenia
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9
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Wang B, Zhang F. Main Descriptors To Correlate Structures with the Performances of Electrocatalysts. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202111026] [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]
Affiliation(s)
- Bin Wang
- State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Dalian Institute of Chemical Physics Chinese Academy of Sciences 457# Zhongshan Road Dalian 116023 Liaoning China
- Center for Advanced Materials Research School of Materials and Chemical Engineering Zhongyuan University of Technology 41# Zhongyuan Road Zhengzhou 450007 Henan China
| | - Fuxiang Zhang
- State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Dalian Institute of Chemical Physics Chinese Academy of Sciences 457# Zhongshan Road Dalian 116023 Liaoning China
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10
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Lončar A, Escalera‐López D, Cherevko S, Hodnik N. Interrelations of Oxygen Evolution and Iridium Dissolution Mechanisms. Angew Chem Int Ed Engl 2021; 61:e202114437. [PMID: 34942052 PMCID: PMC9305877 DOI: 10.1002/anie.202114437] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Indexed: 11/08/2022]
Abstract
The widespread utilization of proton exchange membrane (PEM) electrolyzers currently remains uncertain, as they rely on the use of highly scarce iridium as the only viable catalyst for the oxygen evolution reaction (OER), which is known to present the major energy losses of the process. Understanding the mechanistic origin of the different activities and stabilities of Ir‐based catalysts is, therefore, crucial for a scale‐up of green hydrogen production. It is known that structure influences the dissolution, which is the main degradation mechanism and shares common intermediates with the OER. In this Minireview, the state‐of‐the‐art understanding of dissolution and its relationship with the structure of different iridium catalysts is gathered and correlated to different mechanisms of the OER. A perspective on future directions of investigation is also given.
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Affiliation(s)
- Anja Lončar
- Laboratory for ElectrocatalysisDepartment of Materials ChemistryNational Institute of ChemistryHajdrihova 191000LjubljanaSlovenia
- University of Nova GoricaVipavska 135000Nova GoricaSlovenia
| | - Daniel Escalera‐López
- Helmholtz-Institute Erlangen-Nürnberg for Renewable EnergyForschungszentrum JülichCauerstrasse 191058ErlangenGermany
| | - Serhiy Cherevko
- Helmholtz-Institute Erlangen-Nürnberg for Renewable EnergyForschungszentrum JülichCauerstrasse 191058ErlangenGermany
| | - Nejc Hodnik
- Laboratory for ElectrocatalysisDepartment of Materials ChemistryNational Institute of ChemistryHajdrihova 191000LjubljanaSlovenia
- University of Nova GoricaVipavska 135000Nova GoricaSlovenia
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11
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Pu Z, Liu T, Zhang G, Ranganathan H, Chen Z, Sun S. Electrocatalytic Oxygen Evolution Reaction in Acidic Conditions: Recent Progress and Perspectives. CHEMSUSCHEM 2021; 14:4636-4657. [PMID: 34411443 DOI: 10.1002/cssc.202101461] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/12/2021] [Indexed: 06/13/2023]
Abstract
The electrochemical oxygen evolution reaction (OER) is an important half-cell reaction in many renewable energy conversion and storage technologies, including electrolyzers, nitrogen fixation, CO2 reduction, metal-air batteries, and regenerative fuel cells. Among them, proton exchange membrane (PEM)-based devices exhibit a series of advantages, such as excellent proton conductivity, high durability, and good mechanical strength, and have attracted global interest as a green energy device for transport and stationary sectors. Nevertheless, with a view to rapid commercialization, it is urgent to develop highly active and acid-stable OER catalysts for PEM-based devices. In this Review, based on the recent advances in theoretical calculation and in situ/operando characterization, the OER mechanism in acidic conditions is first discussed in detail. Subsequently, recent advances in the development of several types of acid-stable OER catalysts, including noble metals, non-noble metals, and even metal-free OER materials, are systematically summarized. Finally, the current key issues and future challenges for materials used as acidic OER catalysis are identified and potential future directions are proposed.
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Affiliation(s)
- Zonghua Pu
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, QC J3X 1S2, Canada
| | - Tingting Liu
- Institute for Clean Energy & Advanced Materials, School of Materials & Energy, Southwest University, Chongqing, 400715, P. R. China
| | - Gaixia Zhang
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, QC J3X 1S2, Canada
| | - Hariprasad Ranganathan
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, QC J3X 1S2, Canada
| | - Zhangxing Chen
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Shuhui Sun
- Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, QC J3X 1S2, Canada
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12
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Li N, Cai L, Wang C, Lin Y, Huang J, Sheng H, Pan H, Zhang W, Ji Q, Duan H, Hu W, Zhang W, Hu F, Tan H, Sun Z, Song B, Jin S, Yan W. Identification of the Active-Layer Structures for Acidic Oxygen Evolution from 9R-BaIrO 3 Electrocatalyst with Enhanced Iridium Mass Activity. J Am Chem Soc 2021; 143:18001-18009. [PMID: 34694127 DOI: 10.1021/jacs.1c04087] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Iridium-based perovskites show promising catalytic activity for oxygen evolution reaction (OER) in acid media, but the iridium mass activity remains low and the active-layer structures have not been identified. Here, we report highly active 1 nm IrOx particles anchored on 9R-BaIrO3 (IrOx/9R-BaIrO3) that are directly synthesized by solution calcination followed by strong acid treatment for the first time. The developed IrOx/9R-BaIrO3 catalyst delivers a high iridium mass activity (168 A gIr-1), about 16 times higher than that of the benchmark acidic OER electrocatalyst IrO2 (10 A gIr-1), and only requires a low overpotential of 230 mV to reach a catalytic current density of 10 mA cm-2geo. Careful scanning transmission electron microscopy, synchrotron radiation-based X-ray absorption spectroscopy, and X-ray photoelectron spectroscopy analyses reveal that, during the electrocatalytic process, the initial 1 nm IrOx nanoparticles/9R-BaIrO3 evolve into amorphous Ir4+OxHy/IrO6 octahedrons and then to amorphous Ir5+Ox/IrO6 octahedrons on the surface. Such high relative content of amorphous Ir5+Ox species derived from trimers of face-sharing IrO6 octahedrons in 9R-BaIrO3 and the enhanced metallic conductivity of the Ir5+Ox/9R-BaIrO3 catalyst are responsible for the excellent acidic OER activity. Our results provide new insights into the surface active-layer structure evolution in perovskite electrocatalysts and demonstrate new approaches for engineering highly active acidic OER nanocatalysts.
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Affiliation(s)
- Na Li
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Liang Cai
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China.,Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Chao Wang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Yue Lin
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Jinzhen Huang
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States.,Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150001, P.R. China
| | - Hongyuan Sheng
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Haibin Pan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Wei Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Qianqian Ji
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Hengli Duan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Wei Hu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Wenhua Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Fengchun Hu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Hao Tan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Zhihu Sun
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
| | - Bo Song
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150001, P.R. China
| | - Song Jin
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Wensheng Yan
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P.R. China
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13
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Wang B, Zhang F. Main Descriptors To Correlate Structures with the Performances of Electrocatalysts. Angew Chem Int Ed Engl 2021; 61:e202111026. [PMID: 34587345 DOI: 10.1002/anie.202111026] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/27/2021] [Indexed: 01/05/2023]
Abstract
Traditional trial and error approaches to search for hydrogen/oxygen redox catalysts with high activity and stability are typically tedious and inefficient. There is an urgent need to identify the most important parameters that determine the catalytic performance and so enable the development of design strategies for catalysts. In the past decades, several descriptors have been developed to unravel structure-performance relationships. This Minireview summarizes reactivity descriptors in electrocatalysis including adsorption energy descriptors involving reaction intermediates, electronic descriptors represented by a d-band center, structural descriptors, and universal descriptors, and discusses their merits/limitations. Understanding the trends in electrocatalytic performance and predicting promising catalytic materials using reactivity descriptors should enable the rational construction of catalysts. Artificial intelligence and machine learning have also been adopted to discover new and advanced descriptors. Finally, linear scaling relationships are analyzed and several strategies proposed to circumvent the established scaling relationships and overcome the constraints imposed on the catalytic performance.
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Affiliation(s)
- Bin Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457# Zhongshan Road, Dalian 116023, Liaoning, China.,Center for Advanced Materials Research, School of Materials and Chemical Engineering, Zhongyuan University of Technology, 41# Zhongyuan Road, Zhengzhou, 450007, Henan, China
| | - Fuxiang Zhang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, The Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457# Zhongshan Road, Dalian 116023, Liaoning, China
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14
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Liang Q, Brocks G, Sinha V, Bieberle-Hütter A. Tailoring the Performance of ZnO for Oxygen Evolution by Effective Transition Metal Doping. CHEMSUSCHEM 2021; 14:3064-3073. [PMID: 34037325 DOI: 10.1002/cssc.202100715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/20/2021] [Indexed: 06/12/2023]
Abstract
In the quest for active and inexpensive (photo)electrocatalysts, atomistic simulations of the oxygen evolution reaction (OER) are essential for understanding the catalytic process of water splitting at solid surfaces. In this paper, the enhancement of the OER by first-row transition-metal (TM) doping of the abundant semiconductor ZnO was studied using density functional theory (DFT) calculations on a substantial number of possible structures and bonding geometries. The calculated overpotential for undoped ZnO was 1.0 V. For TM dopants in the 3d series from Mn to Ni, the overpotentials decreased from 0.9 V for Mn and 0.6 V for Fe down to 0.4 V for Co, and rose again to 0.5 V for Ni and 0.8 V for Cu. The overpotentials were analyzed in terms of the binding to the surface of the species involved in the four reaction steps of the OER. The Gibbs free energies associated with the adsorption of these intermediate species increased in the series from Mn to Zn, but the difference between OH and OOH adsorption (the species involved in the first, respectively the third reaction step) was always in the range 3.0-3.3 eV, despite a considerable variation in possible bonding geometries. The bonding of the O intermediate species (involved in the second reaction step), which is optimal for Co, and to a somewhat lesser extend for Ni, then ultimately determined the overpotential. These results implied that both Co and Ni are promising dopants for increasing the activity of ZnO-based anodes for the OER.
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Affiliation(s)
- Qiuhua Liang
- Electrochemical Materials and Interfaces (EMI), Dutch Institute for Fundamental Energy Research (DIFFER), De Zaale 20, 5612 AJ, Eindhoven, The Netherlands
- Materials Simulation and Modeling (MSM), Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Geert Brocks
- Center for Computational Energy Research (CCER), P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
- Materials Simulation and Modeling (MSM), Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
- Computational Materials Science, Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | - Vivek Sinha
- Electrochemical Materials and Interfaces (EMI), Dutch Institute for Fundamental Energy Research (DIFFER), De Zaale 20, 5612 AJ, Eindhoven, The Netherlands
- Process and Energy (P&E) Department, Faculty of Mechanical, Maritime and Materials Engineering (3mE), Delft University of Technology, Leeghwaterstraat 39, 2628CB, Delft, The Netherlands
| | - Anja Bieberle-Hütter
- Electrochemical Materials and Interfaces (EMI), Dutch Institute for Fundamental Energy Research (DIFFER), De Zaale 20, 5612 AJ, Eindhoven, The Netherlands
- Center for Computational Energy Research (CCER), P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
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15
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Gao L, Cui X, Sewell CD, Li J, Lin Z. Recent advances in activating surface reconstruction for the high-efficiency oxygen evolution reaction. Chem Soc Rev 2021; 50:8428-8469. [PMID: 34259239 DOI: 10.1039/d0cs00962h] [Citation(s) in RCA: 201] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A climax in the development of cost-effective and high-efficiency transition metal-based electrocatalysts has been witnessed recently for sustainable energy and related conversion technologies. In this regard, structure-activity relationships based on several descriptors have already been proposed to rationally design electrocatalysts. However, the dynamic reconstruction of the surface structures and compositions of catalysts during electrocatalytic water oxidation, especially during the anodic oxygen evolution reaction (OER), complicate the streamlined prediction of the catalytic activity. With the achievements in operando and in situ techniques, it has been found that electrocatalysts undergo surface reconstruction to form the actual active species in situ accompanied with an increase in their oxidation state during OER in alkaline solution. Accordingly, a thorough understanding of the surface reconstruction process plays a critical role in establishing unambiguous structure-composition-property relationships in pursuit of high-efficiency electrocatalysts. However, several issues still need to be explored before high electrocatalytic activities can be realized, as follows: (1) the identification of initiators and pathways for surface reconstruction, (2) establishing the relationships between structure, composition, and electrocatalytic activity, and (3) the rational manipulation of in situ catalyst surface reconstruction. In this review, the recent progress in the surface reconstruction of transition metal-based OER catalysts including oxides, non-oxides, hydroxides and alloys is summarized, emphasizing the fundamental understanding of reconstruction behavior from the original precatalysts to the actual catalysts based on operando analysis and theoretical calculations. The state-of-the-art strategies to tailor the surface reconstruction such as substituting/doping with metals, introducing anions, incorporating oxygen vacancies, tuning morphologies and exploiting plasmonic/thermal/photothermal effects are then introduced. Notably, comprehensive operando/in situ characterization together with computational calculations are responsible for unveiling the improvement mechanism for OER. By delivering the progress, strategies, insights, techniques, and perspectives, this review will provide a comprehensive understanding of the surface reconstruction in transition metal-based OER catalysts and future guidelines for their rational development.
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Affiliation(s)
- Likun Gao
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
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16
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Chao HJ, Lin ZS, Singuru MMR, Chuang MC. Sustainable oxygen-evolving electrode via in situ regenerative deposition of hexahydroxyiridate (IV)-adsorbed IrOx nanoparticles. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Khusnuriyalova AF, Caporali M, Hey‐Hawkins E, Sinyashin OG, Yakhvarov DG. Preparation of Cobalt Nanoparticles. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100367] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Aliya F. Khusnuriyalova
- Alexander Butlerov Institute of Chemistry Kazan Federal University Kremlyovskaya 18 420008 Kazan Russian Federation
- Arbuzov Institute of Organic and Physical Chemistry FRC Kazan Scientific Center Russian Academy of Sciences Arbuzov Street 8 420088 Kazan Russian Federation
| | - Maria Caporali
- Institute of Chemistry of Organometallic Compounds (ICCOM) Via Madonna del Piano 10 50019 Sesto Fiorentino Italy
| | - Evamarie Hey‐Hawkins
- Faculty of Chemistry and Mineralogy Institute of Inorganic Chemistry Leipzig University Johannisallee 29 04103 Leipzig Germany
| | - Oleg G. Sinyashin
- Arbuzov Institute of Organic and Physical Chemistry FRC Kazan Scientific Center Russian Academy of Sciences Arbuzov Street 8 420088 Kazan Russian Federation
| | - Dmitry G. Yakhvarov
- Alexander Butlerov Institute of Chemistry Kazan Federal University Kremlyovskaya 18 420008 Kazan Russian Federation
- Arbuzov Institute of Organic and Physical Chemistry FRC Kazan Scientific Center Russian Academy of Sciences Arbuzov Street 8 420088 Kazan Russian Federation
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18
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Edgington J, Schweitzer N, Alayoglu S, Seitz LC. Constant Change: Exploring Dynamic Oxygen Evolution Reaction Catalysis and Material Transformations in Strontium Zinc Iridate Perovskite in Acid. J Am Chem Soc 2021; 143:9961-9971. [PMID: 34161089 DOI: 10.1021/jacs.1c04332] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While iridium-based perovskites have been identified as promising candidates for the oxygen evolution reaction (OER) in proton exchange membrane (PEM) electrolyzer applications, an improved fundamental understanding of these highly dynamic materials under reaction conditions is needed to inform more robust future catalyst design. Herein, we study the highly active SrIr0.8Zn0.2O3 perovskite for the OER in acid by employing electrochemical experiments with in situ and ex situ characterization techniques to understand the dynamic nature of this material at both short and long time scales. We observe initial intrinsic OER activity improvement with electrochemical cycling as well as an initial increase of Ir oxidation state under OER conditions via in situ X-ray absorption spectroscopy. We discover that the SrIr0.8Zn0.2O3 perovskite experiences an OER-induced metal to insulator transition (MIT) with extensive electrochemical cycling, caused by surface reorganization and changes to the material crystallinity that occur with exposure to an acidic and oxidizing environment. Our novel identification of an OER-induced MIT for iridate perovskites reveals an additional stability concern for iridate catalysts which are known to experience material dissolution challenges; this work ultimately aims to inform future catalyst material design for PEM water electrolysis applications.
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Affiliation(s)
- Jane Edgington
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Neil Schweitzer
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3113, United States.,Center for Catalysis and Surface Science, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Selim Alayoglu
- Center for Catalysis and Surface Science, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Linsey C Seitz
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208-3113, United States
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19
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IrW nanochannel support enabling ultrastable electrocatalytic oxygen evolution at 2 A cm -2 in acidic media. Nat Commun 2021; 12:3540. [PMID: 34112770 PMCID: PMC8192761 DOI: 10.1038/s41467-021-23907-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 05/21/2021] [Indexed: 11/30/2022] Open
Abstract
A grand challenge for proton exchange membrane electrolyzers is the rational design of oxygen evolution reaction electrocatalysts to balance activity and stability. Here, we report a support-stabilized catalyst, the activated ~200 nm-depth IrW nanochannel that achieves the current density of 2 A cm−2 at an overpotential of only ~497 mV and maintains ultrastable gas evolution at 100 mA cm−2 at least 800 h with a negligible degradation rate of ~4 μV h−1. Structure analyses combined with theoretical calculations indicate that the IrW support alters the charge distribution of surface (IrO2)n clusters and effectively confines the cluster size within 4 (n≤4). Such support-stabilizing effect prevents the surface Ir from agglomeration and retains a thin layer of electrocatalytically active IrO2 clusters on surface, realizing a win-win strategy for ultrahigh OER activity and stability. This work would open up an opportunity for engineering suitable catalysts for robust proton exchange membrane-based electrolyzers. Although electrocatalytic water splitting can generating renewable fuels, it is challenging to find water oxidation catalysts that are stable in acid at high current densities. Here, authors explore IrW as oxygen evolution electrocatalysts maintaining high current densities for hundreds of hours.
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20
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Kluge RM, Haid RW, Bandarenka AS. Assessment of active areas for the oxygen evolution reaction on an amorphous iridium oxide surface. J Catal 2021. [DOI: 10.1016/j.jcat.2021.02.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Nishimoto T, Shinagawa T, Naito T, Takanabe K. Delivering the Full Potential of Oxygen Evolving Electrocatalyst by Conditioning Electrolytes at Near-Neutral pH. CHEMSUSCHEM 2021; 14:1554-1564. [PMID: 33481326 PMCID: PMC8048901 DOI: 10.1002/cssc.202002813] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/12/2021] [Indexed: 05/06/2023]
Abstract
This study reports on the impact of identity and compositions of buffer ions on oxygen evolution reaction (OER) performance at a wide range of pH levels using a model IrOx electrocatalyst. Rigorous microkinetic analysis employing kinetic isotope effects, Tafel analysis, and temperature dependence measurement was conducted to establish rate expression isolated from the diffusion contribution of buffer ions and solution resistance. It was found that the OER kinetics was facile with OH- oxidation compared to H2 O, the results of which were highlighted by mitigating over 200 mV overpotential in the presence of buffer to reach 10 mA cm-2 . This improvement was ascribed to the involvement of the kinetics of the local OH- supply by the buffering action. Further digesting the kinetic data at various buffer pKa and the solution bulk pH disclosed a trade-off between the exchange current density and the Tafel slope, indicating that the optimal electrolyte condition can be chosen at a different range of current density. This study provides a quantitative guideline for electrolyte engineering to maximize the intrinsic OER performance that electrocatalyst possesses especially at near-neutral pH.
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Affiliation(s)
- Takeshi Nishimoto
- Department of Chemical System Engineering, School of EngineeringThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyoJapan
| | - Tatsuya Shinagawa
- Department of Chemical System Engineering, School of EngineeringThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyoJapan
| | - Takahiro Naito
- Department of Chemical System Engineering, School of EngineeringThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyoJapan
| | - Kazuhiro Takanabe
- Department of Chemical System Engineering, School of EngineeringThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyoJapan
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22
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Salimi P, Najafpour MM. A Simple Method for Synthesizing Highly Active Amorphous Iridium Oxide for Oxygen Evolution under Acidic Conditions. Chemistry 2020; 26:17063-17068. [PMID: 32852097 DOI: 10.1002/chem.202000955] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 08/17/2020] [Indexed: 11/09/2022]
Abstract
Water splitting for hydrogen production has been recognized as a promising approach to store sustainable energy. The performance of this method is limited by the oxygen-evolution reaction. Herein, an approach for synthesizing a highly active oxygen-evolving catalyst by a one-step, low-cost, environmentally friendly, and easy-to-perform method is presented, which works by using iridium metal as the anode at a relatively high potential. The obtained IrOx /Ir interface showed an overpotential of 250 mV at 10 mA cm-2 in 0.1 m HClO4 and remained stable under electrochemical conditions. The IrOx that was mechanically separated from the surface of IrOx /Ir metal after operation showed a threefold increase in activity compared to the current benchmark IrO2 catalyst. Various characterization analyses were used to identify the structure and morphology of the catalyst, which suggested nanosized, porous, and amorphous IrOx on the surface of metallic Ir. This synthetic approach can inspire a variety of opportunities to design and synthesize efficient metal oxide-based electrocatalysts for sustainable energy conversion and utilization.
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Affiliation(s)
- Payam Salimi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), 45137-66731, Zanjan, Iran
| | - Mohammad Mahdi Najafpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), 45137-66731, Zanjan, Iran.,Centre of Climate Change and Global Warming, Institute for Advanced Studies in Basic Sciences (IASBS), 45137-66731, Zanjan, Iran.,Research Centre for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), 45137-66731, Zanjan, Iran
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23
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Popović S, Smiljanić M, Jovanovič P, Vavra J, Buonsanti R, Hodnik N. Stability and Degradation Mechanisms of Copper‐Based Catalysts for Electrochemical CO
2
Reduction. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000617] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Stefan Popović
- Department of Materials Chemistry National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
- Department of Catalysis and Chemical Reaction Engineering National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
| | - Milutin Smiljanić
- Department of Materials Chemistry National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
| | - Primož Jovanovič
- Department of Materials Chemistry National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
- Department of Catalysis and Chemical Reaction Engineering National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
| | - Jan Vavra
- Laboratory of Nanochemistry for Energy (LNCE) Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne CH-1950 Sion Switzerland
| | - Raffaella Buonsanti
- Laboratory of Nanochemistry for Energy (LNCE) Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne CH-1950 Sion Switzerland
| | - Nejc Hodnik
- Department of Materials Chemistry National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
- Department of Catalysis and Chemical Reaction Engineering National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
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24
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Popović S, Smiljanić M, Jovanovič P, Vavra J, Buonsanti R, Hodnik N. Stability and Degradation Mechanisms of Copper-Based Catalysts for Electrochemical CO 2 Reduction. Angew Chem Int Ed Engl 2020; 59:14736-14746. [PMID: 32187414 DOI: 10.1002/anie.202000617] [Citation(s) in RCA: 176] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Indexed: 11/05/2022]
Abstract
To date, copper is the only monometallic catalyst that can electrochemically reduce CO2 into high value and energy-dense products, such as hydrocarbons and alcohols. In recent years, great efforts have been directed towards understanding how its nanoscale structure affects activity and selectivity for the electrochemical CO2 reduction reaction (CO2 RR). Furthermore, many attempts have been made to improve these two properties. Nevertheless, to advance towards applied systems, the stability of the catalysts during electrolysis is of great significance. This aspect, however, remains less investigated and discussed across the CO2 RR literature. In this Minireview, the recent progress on understanding the stability of copper-based catalysts is summarized, along with the very few proposed degradation mechanisms. Finally, our perspective on the topic is given.
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Affiliation(s)
- Stefan Popović
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia.,Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia
| | - Milutin Smiljanić
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia
| | - Primož Jovanovič
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia.,Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia
| | - Jan Vavra
- Laboratory of Nanochemistry for Energy (LNCE), Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950, Sion, Switzerland
| | - Raffaella Buonsanti
- Laboratory of Nanochemistry for Energy (LNCE), Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1950, Sion, Switzerland
| | - Nejc Hodnik
- Department of Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia.,Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova 19, 1000, Ljubljana, Slovenia
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25
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Chakrapani V. Probing Active Sites and Reaction Intermediates of Electrocatalysis Through Confocal Near-Infrared Photoluminescence Spectroscopy: A Perspective. Front Chem 2020; 8:327. [PMID: 32411668 PMCID: PMC7199742 DOI: 10.3389/fchem.2020.00327] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 03/31/2020] [Indexed: 12/19/2022] Open
Abstract
Electrocatalytic reactions such as oxygen evolution (OER) and oxygen reduction reactions (ORR) are one of the most complex heterogeneous charge transfer processes because of the involvement of multiple proton-coupled-electron transfer steps over a narrow potential range and the formation/breaking of oxygen-oxygen bonds. Obtaining a clear mechanistic picture of these reactions on some highly active strongly-correlated oxides such as MnOx, NiOx, and IrOx has been challenging due to the inherent limitations of the common spectroscopic tools used for probing the reactive intermediates and active sites. This perspective article briefly summarizes some of the key challenges encountered in such probes and describes some of unique advantages of confocal near-infrared photoluminescence (NIR-PL) technique for probing surface and bulk metal cation states under in-situ and ex-situ electrochemical polarization studies. Use of this technique opens up a new avenue for studying changes in the electronic structure of metal oxides occurring as a result of perturbation of defect equilibria, which is crucial in a broad range of heterogeneous systems such as catalysis, photocatalysis, mineral redox chemistry, and batteries.
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Affiliation(s)
- Vidhya Chakrapani
- Howard P. Isermann Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY, United States.,Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY, United States
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26
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Mahala C, Sharma MD, Basu M. A core@shell hollow heterostructure of Co3O4 and Co3S4: an efficient oxygen evolution catalyst. NEW J CHEM 2019. [DOI: 10.1039/c9nj03623g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A hollow core@shell nanostructure of Co3O4 and Co3S4 helps to enhance the electrocatalytic activity for the OER.
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Affiliation(s)
- Chavi Mahala
- Department of Chemistry
- BITS Pilani
- Pilani Campus
- India
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27
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Zhu K, Zhu X, Yang W. Application of In Situ Techniques for the Characterization of NiFe-Based Oxygen Evolution Reaction (OER) Electrocatalysts. Angew Chem Int Ed Engl 2018; 58:1252-1265. [PMID: 29665168 DOI: 10.1002/anie.201802923] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Indexed: 11/11/2022]
Abstract
Developing high-efficiency and affordable electrocatalysts for the sluggish oxygen evolution reaction (OER) remains a crucial bottleneck on the way to the practical applications of rechargeable energy storage technologies and water splitting for producing clean fuel (H2 ). In recent years, NiFe-based materials have proven to be excellent electrocatalysts for OER. Understanding the characteristics that affect OER activity and determining the OER mechanism are of vital importance for the development of OER electrocatalysts. Therefore, in situ characterization techniques performed under OER conditions are urgently needed to monitor the key intermediates together with identifying the OER active centers and phases. In this Minireview, recent advances regarding in situ techniques for the characterization of NiFe-based electrocatalysts are thoroughly summarized, including Raman spectroscopy, X-ray absorption spectroscopy, ambient pressure X-ray photoelectron spectroscopy, Mössbauer spectroscopy, Ultraviolet-visible spectroscopy, differential electrochemical mass spectrometry, and surface interrogation scanning electrochemical microscopy. The results from these in situ measurements not only reveal the structural transformation and the progressive oxidation of the catalytic species under OER conditions, but also disclose the crucial role of Ni and Fe during the OER. Finally, the need for developing new in situ techniques and theoretical investigations is discussed to better understand the OER mechanism and design promising OER electrocatalysts.
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Affiliation(s)
- Kaiyue Zhu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457# Zhongshan Road, Dalian, 116023, Liaoning, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xuefeng Zhu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457# Zhongshan Road, Dalian, 116023, Liaoning, China
| | - Weishen Yang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457# Zhongshan Road, Dalian, 116023, Liaoning, China
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28
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Zhu K, Zhu X, Yang W. In-situ-Methoden zur Charakterisierung elektrochemischer NiFe-Sauerstoffentwicklungskatalysatoren. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802923] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kaiyue Zhu
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457# Zhongshan Road, Dalian 116023 Liaoning China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Xuefeng Zhu
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457# Zhongshan Road, Dalian 116023 Liaoning China
| | - Weishen Yang
- State Key Laboratory of Catalysis; Dalian Institute of Chemical Physics; Chinese Academy of Sciences; 457# Zhongshan Road, Dalian 116023 Liaoning China
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29
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Streibel V, Hävecker M, Yi Y, Velasco Vélez JJ, Skorupska K, Stotz E, Knop-Gericke A, Schlögl R, Arrigo R. In Situ Electrochemical Cells to Study the Oxygen Evolution Reaction by Near Ambient Pressure X-ray Photoelectron Spectroscopy. Top Catal 2018. [DOI: 10.1007/s11244-018-1061-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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30
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Alia SM, Shulda S, Ngo C, Pylypenko S, Pivovar BS. Iridium-Based Nanowires as Highly Active, Oxygen Evolution Reaction Electrocatalysts. ACS Catal 2018. [DOI: 10.1021/acscatal.7b03787] [Citation(s) in RCA: 134] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shaun M. Alia
- Chemistry
and Nanoscience Center, National Renewable Energy Laboratory, 15013
Denver West Parkway, Golden, Colorado 80401, United States
| | - Sarah Shulda
- Department
of Chemistry and Geochemistry, Colorado School of Mines, 1012 14th Street, Golden, Colorado 80401, United States
| | - Chilan Ngo
- Department
of Chemistry and Geochemistry, Colorado School of Mines, 1012 14th Street, Golden, Colorado 80401, United States
| | - Svitlana Pylypenko
- Department
of Chemistry and Geochemistry, Colorado School of Mines, 1012 14th Street, Golden, Colorado 80401, United States
| | - Bryan S. Pivovar
- Chemistry
and Nanoscience Center, National Renewable Energy Laboratory, 15013
Denver West Parkway, Golden, Colorado 80401, United States
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31
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Kasian O, Grote JP, Geiger S, Cherevko S, Mayrhofer KJJ. Die gemeinsamen Zwischenprodukte von Sauerstoffentwicklung und Auflösung während der Wasserelektrolyse an Iridium. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201709652] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Olga Kasian
- Max-Planck-Institut für Eisenforschung GmbH; Max-Planck-Straße 1 40237 Düsseldorf Deutschland
| | - Jan-Philipp Grote
- Max-Planck-Institut für Eisenforschung GmbH; Max-Planck-Straße 1 40237 Düsseldorf Deutschland
| | - Simon Geiger
- Max-Planck-Institut für Eisenforschung GmbH; Max-Planck-Straße 1 40237 Düsseldorf Deutschland
| | - Serhiy Cherevko
- Max-Planck-Institut für Eisenforschung GmbH; Max-Planck-Straße 1 40237 Düsseldorf Deutschland
- Helmholtz-Institut Erlangen-Nürnberg für Erneuerbare Energien, IEK-11, Forschungszentrum Jülich GmbH; Egerlandstraße 3 91058 Erlangen Deutschland
| | - Karl J. J. Mayrhofer
- Max-Planck-Institut für Eisenforschung GmbH; Max-Planck-Straße 1 40237 Düsseldorf Deutschland
- Helmholtz-Institut Erlangen-Nürnberg für Erneuerbare Energien, IEK-11, Forschungszentrum Jülich GmbH; Egerlandstraße 3 91058 Erlangen Deutschland
- Department Chemie- und Bioingenieurwesen; Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstraße 3 91058 Erlangen Deutschland
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32
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Kasian O, Grote JP, Geiger S, Cherevko S, Mayrhofer KJJ. The Common Intermediates of Oxygen Evolution and Dissolution Reactions during Water Electrolysis on Iridium. Angew Chem Int Ed Engl 2018; 57:2488-2491. [PMID: 29219237 PMCID: PMC5838529 DOI: 10.1002/anie.201709652] [Citation(s) in RCA: 161] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Indexed: 11/12/2022]
Abstract
Understanding the pathways of catalyst degradation during the oxygen evolution reaction is a cornerstone in the development of efficient and stable electrolyzers, since even for the most promising Ir based anodes the harsh reaction conditions are detrimental. The dissolution mechanism is complex and the correlation to the oxygen evolution reaction itself is still poorly understood. Here, by coupling a scanning flow cell with inductively coupled plasma and online electrochemical mass spectrometers, we monitor the oxygen evolution and degradation products of Ir and Ir oxides in situ. It is shown that at high anodic potentials several dissolution routes become possible, including formation of gaseous IrO3. On the basis of experimental data, possible pathways are proposed for the oxygen‐evolution‐triggered dissolution of Ir and the role of common intermediates for these reactions is discussed.
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Affiliation(s)
- Olga Kasian
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237, Düsseldorf, Germany
| | - Jan-Philipp Grote
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237, Düsseldorf, Germany
| | - Simon Geiger
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237, Düsseldorf, Germany
| | - Serhiy Cherevko
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237, Düsseldorf, Germany.,Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, IEK-11, Forschungszentrum Jülich GmbH, Egerlandstrasse 3, 91058, Erlangen, Germany
| | - Karl J J Mayrhofer
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Strasse 1, 40237, Düsseldorf, Germany.,Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy, IEK-11, Forschungszentrum Jülich GmbH, Egerlandstrasse 3, 91058, Erlangen, Germany.,Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058, Erlangen, Germany
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33
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Massué C, Pfeifer V, van Gastel M, Noack J, Algara‐Siller G, Cap S, Schlögl R. Reactive Electrophilic O I- Species Evidenced in High-Performance Iridium Oxohydroxide Water Oxidation Electrocatalysts. CHEMSUSCHEM 2017; 10:4786-4798. [PMID: 28941180 PMCID: PMC5813174 DOI: 10.1002/cssc.201701291] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 08/29/2017] [Indexed: 05/27/2023]
Abstract
Although quasi-amorphous iridium oxohydroxides have been identified repeatedly as superior electrocatalysts for the oxygen evolution reaction (OER), an exact description of the performance-relevant species has remained a challenge. In this context, we report the characterization of hydrothermally prepared iridium(III/IV) oxohydroxides that exhibit exceptional OER performances. Holes in the O 2p states of the iridium(III/IV) oxohydroxides result in reactive OI- species, which are identified by characteristic near-edge X-ray absorption fine structure (NEXAFS) features. A prototypical titration reaction with CO as a probe molecule shows that these OI- species are highly susceptible to nucleophilic attack at room temperature. Similarly to the preactivated oxygen involved in the biological OER in photosystem II, the electrophilic OI- species evidenced in the iridium(III/IV) oxohydroxides are suggested to be precursors to species involved in the O-O bond formation during the electrocatalytic OER. The CO titration also highlights a link between the OER performance and the surface/subsurface mobility of the OI- species. Thus, the superior electrocatalytic properties of the iridium (III/IV) oxohydroxides are explained by their ability to accommodate preactivated electrophilic OI- species that can migrate within the lattice.
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Affiliation(s)
- Cyriac Massué
- Department of Inorganic ChemistryFritz Haber Institute of the Max Planck SocietyBerlin14195Germany
- Department of Heterogenous ReactionsMax Planck Institute for Chemical Energy ConversionMülheim an der Ruhr45470Germany
| | - Verena Pfeifer
- Department of Inorganic ChemistryFritz Haber Institute of the Max Planck SocietyBerlin14195Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbHElektronenspeicherring BESSY IIBerlin12489Germany
| | - Maurice van Gastel
- Department of Molecular Theory and SpectroscopyMax Planck Institute for Chemical Energy ConversionMülheim an der Ruhr45470Germany
| | - Johannes Noack
- Department of Inorganic ChemistryFritz Haber Institute of the Max Planck SocietyBerlin14195Germany
| | - Gerardo Algara‐Siller
- Department of Inorganic ChemistryFritz Haber Institute of the Max Planck SocietyBerlin14195Germany
| | - Sébastien Cap
- Department of Inorganic ChemistryFritz Haber Institute of the Max Planck SocietyBerlin14195Germany
| | - Robert Schlögl
- Department of Inorganic ChemistryFritz Haber Institute of the Max Planck SocietyBerlin14195Germany
- Department of Heterogenous ReactionsMax Planck Institute for Chemical Energy ConversionMülheim an der Ruhr45470Germany
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34
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35
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Escudero-Escribano M, Pedersen AF, Paoli EA, Frydendal R, Friebel D, Malacrida P, Rossmeisl J, Stephens IEL, Chorkendorff I. Importance of Surface IrOx in Stabilizing RuO2 for Oxygen Evolution. J Phys Chem B 2017; 122:947-955. [DOI: 10.1021/acs.jpcb.7b07047] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- María Escudero-Escribano
- Nano-Science
Centre, Department of Chemistry, University of Copenhagen, Universitetsparken
5, DK-2100 Copenhagen, Denmark
- Department
of Physics, Fysikvej, Building 312, Technical University of Denmark (DTU), DK-2800 Kgs. Lyngby, Denmark
- SUNCAT
Center for Interface Science and Catalysis, Department of Chemical
Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
| | - Anders F. Pedersen
- Department
of Physics, Fysikvej, Building 312, Technical University of Denmark (DTU), DK-2800 Kgs. Lyngby, Denmark
| | - Elisa A. Paoli
- Department
of Physics, Fysikvej, Building 312, Technical University of Denmark (DTU), DK-2800 Kgs. Lyngby, Denmark
| | - Rasmus Frydendal
- Department
of Physics, Fysikvej, Building 312, Technical University of Denmark (DTU), DK-2800 Kgs. Lyngby, Denmark
| | - Daniel Friebel
- SUNCAT
Center for Interface Science and Catalysis, Department of Chemical
Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
| | - Paolo Malacrida
- Department
of Physics, Fysikvej, Building 312, Technical University of Denmark (DTU), DK-2800 Kgs. Lyngby, Denmark
| | - Jan Rossmeisl
- Nano-Science
Centre, Department of Chemistry, University of Copenhagen, Universitetsparken
5, DK-2100 Copenhagen, Denmark
| | - Ifan E. L. Stephens
- Department
of Physics, Fysikvej, Building 312, Technical University of Denmark (DTU), DK-2800 Kgs. Lyngby, Denmark
- Department
of Materials, Imperial College London, 2.03b, Royal School of Mines, London SW72AZ, England
| | - Ib Chorkendorff
- Department
of Physics, Fysikvej, Building 312, Technical University of Denmark (DTU), DK-2800 Kgs. Lyngby, Denmark
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36
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Pedersen AF, Escudero-Escribano M, Sebok B, Bodin A, Paoli E, Frydendal R, Friebel D, Stephens IEL, Rossmeisl J, Chorkendorff I, Nilsson A. Operando XAS Study of the Surface Oxidation State on a Monolayer IrO x on RuO x and Ru Oxide Based Nanoparticles for Oxygen Evolution in Acidic Media. J Phys Chem B 2017; 122:878-887. [PMID: 28980810 DOI: 10.1021/acs.jpcb.7b06982] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein we present surface sensitive operando XAS L-edge measurements on IrOx/RuO2 thin films as well as mass-selected RuOx and Ru nanoparticles. We observed shifts of the white line XAS peak toward higher energies with applied electrochemical potential. Apart from the case of the metallic Ru nanoparticles, the observed potential dependencies were purely core-level shifts caused by a change in oxidation state, which indicates no structural changes. These findings can be explained by different binding energies of oxygenated species on the surface of IrOx and RuOx. Simulated XAS spectra show that the average Ir oxidation state change is strongly affected by the coverage of atomic O. The observed shifts in oxidation state suggest that the surface has a high coverage of O at potentials just below the potential where oxygen evolution is exergonic in free energy. This observation is consistent with the notion that the metal-oxygen bond is stronger than ideal.
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Affiliation(s)
- Anders F Pedersen
- Department of Physics, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Maria Escudero-Escribano
- Department of Physics, Technical University of Denmark , 2800 Kongens Lyngby, Denmark.,Department of Chemistry, University of Copenhagen , 2100 København, Denmark.,SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University , Stanford, California 94305, United States
| | - Bela Sebok
- Department of Physics, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Anders Bodin
- Department of Physics, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Elisa Paoli
- Department of Physics, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Rasmus Frydendal
- Department of Physics, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Daniel Friebel
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University , Stanford, California 94305, United States
| | - Ifan E L Stephens
- Department of Physics, Technical University of Denmark , 2800 Kongens Lyngby, Denmark.,Department of Materials, Imperial College , Exhibition Road, London SW7 2AZ, United Kingdom
| | - Jan Rossmeisl
- Department of Chemistry, University of Copenhagen , 2100 København, Denmark
| | - Ib Chorkendorff
- Department of Physics, Technical University of Denmark , 2800 Kongens Lyngby, Denmark
| | - Anders Nilsson
- Fysikum, Stockholm University , 106 91 Stockholm, Sweden
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37
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Sharninghausen LS, Sinha SB, Shopov DY, Mercado BQ, Balcells D, Brudvig GW, Crabtree RH. Synthesis and Characterization of Iridium(V) Coordination Complexes With an N,O‐Donor Organic Ligand. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707593] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Shashi Bhushan Sinha
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06520 USA
| | - Dimitar Y. Shopov
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06520 USA
| | - Brandon Q. Mercado
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06520 USA
| | - David Balcells
- Hylleraas Center for Quantum Molecular Sciences Department of Chemistry University of Oslo P.O. Box 1033 Blindern 0315 Oslo Norway
| | - Gary W. Brudvig
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06520 USA
| | - Robert H. Crabtree
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06520 USA
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38
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Sharninghausen LS, Sinha SB, Shopov DY, Mercado BQ, Balcells D, Brudvig GW, Crabtree RH. Synthesis and Characterization of Iridium(V) Coordination Complexes With an N,O-Donor Organic Ligand. Angew Chem Int Ed Engl 2017; 56:13047-13051. [PMID: 28815915 DOI: 10.1002/anie.201707593] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 08/15/2017] [Indexed: 11/09/2022]
Abstract
We have prepared and fully characterized two isomers of [IrIV (dpyp)2 ] (dpyp=meso-2,4-di(2-pyridinyl)-2,4-pentanediolate). These complexes can cleanly oxidize to [IrV (dpyp)2 ]+ , which to our knowledge represent the first mononuclear coordination complexes of IrV in an N,O-donor environment. One isomer has been fully characterized in the IrV state, including by X-ray crystallography, XPS, and DFT calculations, all of which confirm metal-centered oxidation. The unprecedented stability of these IrV complexes is ascribed to the exceptional donor strength of the ligands, their resistance to oxidative degradation, and the presence of four highly donor alkoxide groups in a plane, which breaks the degeneracy of the d-orbitals and favors oxidation.
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Affiliation(s)
- Liam S Sharninghausen
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520, USA
| | - Shashi Bhushan Sinha
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520, USA
| | - Dimitar Y Shopov
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520, USA
| | - Brandon Q Mercado
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520, USA
| | - David Balcells
- Hylleraas Center for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, 0315, Oslo, Norway
| | - Gary W Brudvig
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520, USA
| | - Robert H Crabtree
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520, USA
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39
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Massué C, Pfeifer V, Huang X, Noack J, Tarasov A, Cap S, Schlögl R. High-Performance Supported Iridium Oxohydroxide Water Oxidation Electrocatalysts. CHEMSUSCHEM 2017; 10:1943-1957. [PMID: 28164475 DOI: 10.1002/cssc.201601817] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 01/27/2017] [Indexed: 06/06/2023]
Abstract
The synthesis of a highly active and yet stable electrocatalyst for the anodic oxygen evolution reaction (OER) remains a major challenge for acidic water splitting on an industrial scale. To address this challenge, we obtained an outstanding high-performance OER catalyst by loading Ir on conductive antimony-doped tin oxide (ATO)-nanoparticles by a microwave (MW)-assisted hydrothermal route. The obtained Ir phase was identified by using XRD as amorphous (XRD-amorphous), highly hydrated IrIII/IV oxohydroxide. To identify chemical and structural features responsible for the high activity and exceptional stability under acidic OER conditions with loadings as low as 20 μgIr cm-2 , we used stepwise thermal treatment to gradually alter the XRD-amorphous Ir phase by dehydroxylation and crystallization of IrO2 . This resulted in dramatic depletion of OER performance, indicating that the outstanding electrocatalytic properties of the MW-produced IrIII/IV oxohydroxide are prominently linked to the nature of the produced Ir phase. This finding is in contrast with the often reported stable but poor OER performance of crystalline IrO2 -based compounds produced through more classical calcination routes. Our investigation demonstrates the immense potential of Ir oxohydroxide-based OER electrocatalysts for stable high-current water electrolysis under acidic conditions.
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Affiliation(s)
- Cyriac Massué
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
- Department of Heterogenous Reactions, Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470, Mülheim-an-der-Ruhr, Germany
| | - Verena Pfeifer
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Xing Huang
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Johannes Noack
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Andrey Tarasov
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Sébastien Cap
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
| | - Robert Schlögl
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195, Berlin, Germany
- Department of Heterogenous Reactions, Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470, Mülheim-an-der-Ruhr, Germany
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40
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Spöri C, Kwan JTH, Bonakdarpour A, Wilkinson DP, Strasser P. Stabilitätsanforderungen von Elektrokatalysatoren für die Sauerstoffentwicklung: der Weg zu einem grundlegenden Verständnis und zur Minimierung der Katalysatordegradation. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201608601] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Camillo Spöri
- The Electrochemical Energy, Catalysis and Materials, Science Laboratory, Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 124 10623 Berlin Deutschland
| | - Jason Tai Hong Kwan
- Department of Chemical and Biological Engineering; University of British Columbia; 2360 East Mall Vancouver B.C V6T 1Z3 Kanada
| | - Arman Bonakdarpour
- Department of Chemical and Biological Engineering; University of British Columbia; 2360 East Mall Vancouver B.C V6T 1Z3 Kanada
| | - David P. Wilkinson
- Department of Chemical and Biological Engineering; University of British Columbia; 2360 East Mall Vancouver B.C V6T 1Z3 Kanada
| | - Peter Strasser
- The Electrochemical Energy, Catalysis and Materials, Science Laboratory, Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 124 10623 Berlin Deutschland
- Ertl Center for Electrochemistry and Catalysis; Gwangju Institute of Science and Technology; Gwangju 500-712 Südkorea
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41
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Spöri C, Kwan JTH, Bonakdarpour A, Wilkinson DP, Strasser P. The Stability Challenges of Oxygen Evolving Catalysts: Towards a Common Fundamental Understanding and Mitigation of Catalyst Degradation. Angew Chem Int Ed Engl 2017; 56:5994-6021. [PMID: 27805788 DOI: 10.1002/anie.201608601] [Citation(s) in RCA: 288] [Impact Index Per Article: 41.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Indexed: 11/09/2022]
Abstract
This Review addresses the technical challenges, scientific basis, recent progress, and outlook with respect to the stability and degradation of catalysts for the oxygen evolution reaction (OER) operating at electrolyzer anodes in acidic environments with an emphasis on ion exchange membrane applications. First, the term "catalyst stability" is clarified, as well as current performance targets, major catalyst degradation mechanisms, and their mitigation strategies. Suitable in situ experimental methods are then evaluated to give insight into catalyst degradation and possible pathways to tune OER catalyst stability. Finally, the importance of identifying universal figures of merit for stability is highlighted, leading to a comprehensive accelerated lifetime test that could yield comparable performance data across different laboratories and catalyst types. The aim of this Review is to help disseminate and stress the important relationships between structure, composition, and stability of OER catalysts under different operating conditions.
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Affiliation(s)
- Camillo Spöri
- The Electrochemical Energy, Catalysis and Materials Science Laboratory, Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 124, 10623, Berlin, Germany
| | - Jason Tai Hong Kwan
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, B.C, V6T 1Z3, Canada
| | - Arman Bonakdarpour
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, B.C, V6T 1Z3, Canada
| | - David P Wilkinson
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, B.C, V6T 1Z3, Canada
| | - Peter Strasser
- The Electrochemical Energy, Catalysis and Materials Science Laboratory, Department of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 124, 10623, Berlin, Germany.,Ertl Center for Electrochemistry and Catalysis, Gwangju Institute of Science and Technology, Gwangju, 500-712, South Korea
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42
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Kim H, Kim Y, Noh Y, Lee S, Sung J, Kim WB. Thermally Converted CoO Nanoparticles Embedded into N-Doped Carbon Layers as Highly Efficient Bifunctional Electrocatalysts for Oxygen Reduction and Oxygen Evolution Reactions. ChemCatChem 2017. [DOI: 10.1002/cctc.201601705] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hyeonghun Kim
- School of Materials Science and Engineering; Gwangju Institute of Science and Technology (GIST); 123 Chemdangwagi-ro Buk-gu Gwangju 61005 South Korea
| | - Youngmin Kim
- Carbon Resources Institute; Korea Research Institute of Chemical Technology (KRICT); 141 Gajeong-ro Yuseong-gu Daejeon 34114 South Korea
| | - Yuseong Noh
- Department of Chemical Engineering; Pohang University of Science and Technology (POSTECH); 77 Cheongam-ro Nam-gu Pohang 37673 South Korea
| | - Seonhwa Lee
- School of Materials Science and Engineering; Gwangju Institute of Science and Technology (GIST); 123 Chemdangwagi-ro Buk-gu Gwangju 61005 South Korea
| | - Jaekyung Sung
- School of Materials Science and Engineering; Gwangju Institute of Science and Technology (GIST); 123 Chemdangwagi-ro Buk-gu Gwangju 61005 South Korea
| | - Won Bae Kim
- Department of Chemical Engineering; Pohang University of Science and Technology (POSTECH); 77 Cheongam-ro Nam-gu Pohang 37673 South Korea
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43
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Kalz KF, Kraehnert R, Dvoyashkin M, Dittmeyer R, Gläser R, Krewer U, Reuter K, Grunwaldt J. Future Challenges in Heterogeneous Catalysis: Understanding Catalysts under Dynamic Reaction Conditions. ChemCatChem 2017; 9:17-29. [PMID: 28239429 PMCID: PMC5299475 DOI: 10.1002/cctc.201600996] [Citation(s) in RCA: 203] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Indexed: 01/12/2023]
Abstract
In the future, (electro-)chemical catalysts will have to be more tolerant towards a varying supply of energy and raw materials. This is mainly due to the fluctuating nature of renewable energies. For example, power-to-chemical processes require a shift from steady-state operation towards operation under dynamic reaction conditions. This brings along a number of demands for the design of both catalysts and reactors, because it is well-known that the structure of catalysts is very dynamic. However, in-depth studies of catalysts and catalytic reactors under such transient conditions have only started recently. This requires studies and advances in the fields of 1) operando spectroscopy including time-resolved methods, 2) theory with predictive quality, 3) kinetic modelling, 4) design of catalysts by appropriate preparation concepts, and 5) novel/modular reactor designs. An intensive exchange between these scientific disciplines will enable a substantial gain of fundamental knowledge which is urgently required. This concept article highlights recent developments, challenges, and future directions for understanding catalysts under dynamic reaction conditions.
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Affiliation(s)
- Kai F. Kalz
- Institute of Catalysis Research and Technology (IKFT)Karlsruhe Institute of Technology (KIT)D-76344Eggenstein-LeopoldshafenGermany
| | - Ralph Kraehnert
- Department of ChemistryTechnische Universität BerlinD-10623BerlinGermany
| | - Muslim Dvoyashkin
- Institute of Chemical TechnologyUniversität LeipzigD-04103LeipzigGermany
| | - Roland Dittmeyer
- Institute for Micro Process Engineering (IMVT)Karlsruhe Institute of Technology (KIT)D-76344Eggenstein-LeopoldshafenGermany
| | - Roger Gläser
- Institute of Chemical TechnologyUniversität LeipzigD-04103LeipzigGermany
| | - Ulrike Krewer
- Institute of Energy and Process Systems EngineeringTU BraunschweigD-38106BraunschweigGermany
| | - Karsten Reuter
- Chair for Theoretical Chemistry and Catalysis Research CenterTechnische Universität MünchenD-85747GarchingGermany
| | - Jan‐Dierk Grunwaldt
- Institute of Catalysis Research and Technology (IKFT)Karlsruhe Institute of Technology (KIT)D-76344Eggenstein-LeopoldshafenGermany
- Institute for Chemical Technology and Polymer Chemistry (ITCP)Karlsruhe Institute of Technology (KIT)D-76131KarlsruheGermany
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44
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Finkelstein-Shapiro D, Fournier M, Méndez-Hernández DD, Guo C, Calatayud M, Moore TA, Moore AL, Gust D, Yarger JL. Understanding iridium oxide nanoparticle surface sites by their interaction with catechol. Phys Chem Chem Phys 2017; 19:16151-16158. [DOI: 10.1039/c7cp01516j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report the first method to quantitatively understand the optical and catalytic properties of IrOx nanoparticles.
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Affiliation(s)
| | - Maxime Fournier
- Department of Chemistry and Biochemistry
- Arizona State University
- Tempe
- USA
| | | | - Chengchen Guo
- Department of Chemistry and Biochemistry
- Arizona State University
- Tempe
- USA
| | - Monica Calatayud
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7616
- Laboratoire de Chimie Théorique
- Paris
| | - Thomas A. Moore
- Department of Chemistry and Biochemistry
- Arizona State University
- Tempe
- USA
| | - Ana L. Moore
- Department of Chemistry and Biochemistry
- Arizona State University
- Tempe
- USA
| | - Devens Gust
- Department of Chemistry and Biochemistry
- Arizona State University
- Tempe
- USA
| | - Jeffery L. Yarger
- Department of Chemistry and Biochemistry
- Arizona State University
- Tempe
- USA
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45
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Feng JX, Xu H, Dong YT, Ye SH, Tong YX, Li GR. FeOOH/Co/FeOOH Hybrid Nanotube Arrays as High-Performance Electrocatalysts for the Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2016; 55:3694-8. [DOI: 10.1002/anie.201511447] [Citation(s) in RCA: 516] [Impact Index Per Article: 64.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Yu-Tao Dong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
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46
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Feng JX, Xu H, Dong YT, Ye SH, Tong YX, Li GR. FeOOH/Co/FeOOH Hybrid Nanotube Arrays as High-Performance Electrocatalysts for the Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511447] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jin-Xian Feng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Han Xu
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Yu-Tao Dong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Sheng-Hua Ye
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Ye-Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
| | - Gao-Ren Li
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering; Sun Yat-sen University; Guangzhou 510275 China
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47
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Wang L, Lettenmeier P, Golla-Schindler U, Gazdzicki P, Cañas NA, Morawietz T, Hiesgen R, Hosseiny SS, Gago AS, Friedrich KA. Nanostructured Ir-supported on Ti4O7 as a cost-effective anode for proton exchange membrane (PEM) electrolyzers. Phys Chem Chem Phys 2016; 18:4487-95. [DOI: 10.1039/c5cp05296c] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A cost-effective catalyst Ir/Ti4O7 with superior OER activity has been developed, by which the Ir loading in the anode of a PEM electrolyzer can be reduced.
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Affiliation(s)
- Li Wang
- Institute of Engineering Thermodynamics
- German Aerospace Center
- Stuttgart
- Germany
| | - Philipp Lettenmeier
- Institute of Engineering Thermodynamics
- German Aerospace Center
- Stuttgart
- Germany
| | - Ute Golla-Schindler
- Group of Electron Microscopy of Materials Science
- Central Facility for Electron Microscopy
- University of Ulm
- 89081 Ulm
- Germany
| | - Pawel Gazdzicki
- Institute of Engineering Thermodynamics
- German Aerospace Center
- Stuttgart
- Germany
| | - Natalia A. Cañas
- Institute of Engineering Thermodynamics
- German Aerospace Center
- Stuttgart
- Germany
| | - Tobias Morawietz
- University of Applied Sciences Esslingen
- Dep. of Basic Science
- Esslingen
- Germany
| | - Renate Hiesgen
- University of Applied Sciences Esslingen
- Dep. of Basic Science
- Esslingen
- Germany
| | - S. Schwan Hosseiny
- Institute of Engineering Thermodynamics
- German Aerospace Center
- Stuttgart
- Germany
| | - Aldo S. Gago
- Institute of Engineering Thermodynamics
- German Aerospace Center
- Stuttgart
- Germany
| | - K. Andreas Friedrich
- Institute of Engineering Thermodynamics
- German Aerospace Center
- Stuttgart
- Germany
- Institute of Energy Storage
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48
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Dou S, Li X, Tao L, Huo J, Wang S. Cobalt nanoparticle-embedded carbon nanotube/porous carbon hybrid derived from MOF-encapsulated Co3O4 for oxygen electrocatalysis. Chem Commun (Camb) 2016; 52:9727-30. [DOI: 10.1039/c6cc05244d] [Citation(s) in RCA: 267] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A MOF encapsulated Co3O4-derived Co–carbon nanotube/porous carbon electrocatalyst exhibits highly efficient electrocatalytic activity for the ORR and OER.
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Affiliation(s)
- Shuo Dou
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Xingyue Li
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Li Tao
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Jia Huo
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Shuangyin Wang
- State Key Laboratory of Chem/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
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49
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Pfeifer V, Jones TE, Velasco Vélez JJ, Massué C, Arrigo R, Teschner D, Girgsdies F, Scherzer M, Greiner MT, Allan J, Hashagen M, Weinberg G, Piccinin S, Hävecker M, Knop-Gericke A, Schlögl R. The electronic structure of iridium and its oxides. SURF INTERFACE ANAL 2015. [DOI: 10.1002/sia.5895] [Citation(s) in RCA: 209] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Verena Pfeifer
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH; Elektronenspeicherring BESSY II; Albert-Einstein-Str. 15 12489 Berlin Germany
| | - Travis E. Jones
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
| | - Juan J. Velasco Vélez
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
- Max-Planck-Institut für Chemische Energiekonversion; Stiftstr. 34-36 45470 Mülheim a. d. Ruhr Germany
| | - Cyriac Massué
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
- Max-Planck-Institut für Chemische Energiekonversion; Stiftstr. 34-36 45470 Mülheim a. d. Ruhr Germany
| | - Rosa Arrigo
- Diamond Light Source Ltd.; Harwell Science and Innovation Campus Didcot Oxfordshire OX11 0DE UK
| | - Detre Teschner
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
| | - Frank Girgsdies
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
| | - Michael Scherzer
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
- Max-Planck-Institut für Chemische Energiekonversion; Stiftstr. 34-36 45470 Mülheim a. d. Ruhr Germany
| | - Mark T. Greiner
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
| | - Jasmin Allan
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
| | - Maike Hashagen
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
| | - Gisela Weinberg
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
| | - Simone Piccinin
- Istituto Officina dei Materiali (CNR-IOM); c/o SISSA - Scuola Internazionale Superiore di Studi Avanzati; Via Bonomea 267 34136 Trieste Italy
| | - Michael Hävecker
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
- Max-Planck-Institut für Chemische Energiekonversion; Stiftstr. 34-36 45470 Mülheim a. d. Ruhr Germany
| | - Axel Knop-Gericke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
| | - Robert Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft; Faradayweg 4-6 14195 Berlin Germany
- Max-Planck-Institut für Chemische Energiekonversion; Stiftstr. 34-36 45470 Mülheim a. d. Ruhr Germany
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50
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Velasco‐Velez JJ, Pfeifer V, Hävecker M, Weatherup RS, Arrigo R, Chuang C, Stotz E, Weinberg G, Salmeron M, Schlögl R, Knop‐Gericke A. Photoelektronenspektroskopie an der Graphen‐Flüssigelektrolyt‐Grenzfläche zur Bestimmung der elektronischen Struktur eines elektrochemisch abgeschiedenen Cobalt/Graphen‐Elektrokatalysators. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Juan J. Velasco‐Velez
- Max‐Planck‐Institut für Chemische Energiekonversion, Mülheim 45470 (Deutschland)
- Fritz‐Haber‐Institut der Max‐Planck‐Gesellschaft, Berlin 14195 (Deutschland)
| | - Verena Pfeifer
- Fritz‐Haber‐Institut der Max‐Planck‐Gesellschaft, Berlin 14195 (Deutschland)
| | - Michael Hävecker
- Max‐Planck‐Institut für Chemische Energiekonversion, Mülheim 45470 (Deutschland)
- Helmholtz‐Zentrum Berlin für Materialien und Energie, BESSY II, Berlin 12489 (Deutschland)
| | - Robert S. Weatherup
- Engineering Department, University of Cambridge, Cambridge CB3 0FA (Großbritannien)
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley 94720 (USA)
| | - Rosa Arrigo
- Diamond Light Source, Oxfordshire OX11 0QX (Großbritannien)
| | | | - Eugen Stotz
- Fritz‐Haber‐Institut der Max‐Planck‐Gesellschaft, Berlin 14195 (Deutschland)
| | - Gisela Weinberg
- Fritz‐Haber‐Institut der Max‐Planck‐Gesellschaft, Berlin 14195 (Deutschland)
| | - Miquel Salmeron
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley 94720 (USA)
| | - Robert Schlögl
- Max‐Planck‐Institut für Chemische Energiekonversion, Mülheim 45470 (Deutschland)
- Fritz‐Haber‐Institut der Max‐Planck‐Gesellschaft, Berlin 14195 (Deutschland)
| | - Axel Knop‐Gericke
- Fritz‐Haber‐Institut der Max‐Planck‐Gesellschaft, Berlin 14195 (Deutschland)
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