DataVXAdvanced MaterialsPaper
journal article·2023-10Open access

Structurally‐Distorted RuIr‐Based Nanoframes for Long‐Duration Oxygen Evolution Catalysis

Shangheng Liu, Huang Tan, Yu‐Cheng Huang, Qiaobao Zhang, Haiping Lin, Ling Li, Zhiwei Hu, Wei‐Hsiang Huang, Chih‐Wen Pao, Jyh‐Fu Lee, Qingyu Kong, Qi Shao, Yong Xu, Xiaoqing Huang

Advanced Materials· Volume 35· Issue 42
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Abstract

Abstract Oxygen evolution reaction (OER) plays a key role in proton exchange membrane water electrolysis (PEMWE), yet the electrocatalysts still suffer from the disadvantages of low activity and poor stability in acidic conditions. Here, a new class of CdRu2IrOx nanoframes with distorted structure for acidic OER is successfully fabricated. Impressively, CdRu2IrOx displays an ultralow overpotential of 189 mV and an ultralong stability of 1500 h at 10 mA cm⁻2 toward OER in 0.5 M H2SO4. Moreover, a PEMWE using the distorted CdRu2IrOx can be steadily operated at 0.1 A cm⁻2 for 90 h. Microstructural analyses and X‐ray absorption spectroscopy (XAS) demonstrate that the synergy between Ru and Ir in CdRu2IrOx induces the distortion of Ru−O, Ir−O, and Ru−M (M = Ru, Ir) bonds. In situ XAS indicates that the applied potential leads to the deformation octahedral structure of RuOx/IrOx and the formation of stable Ru5+ species for OER. Theoretical calculations also reveal that the distorted structures can reduce the energy barrier of rate‐limiting step during OER. This work provides an efficient strategy for constructing structural distortion to achieve significant enhancement on the activity and stability of OER catalysts.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Catalytic Processes in Materials Science

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

Guangzhou Key Laboratory of Low‐Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy Materials School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China

School of Physics and Information Technology Shaanxi Normal University Xi'an 710119 China

Department of Electrophysics National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan

Department of Materials Science and Engineering College of Materials Xiamen University Xiamen 361005 China

College of Chemistry, Chemical Engineering and Materials Science Soochow University Jiangsu 215123 China

Max Planck Institute for Chemical Physics of Solids Nothnitzer Strasse 40 01187 Dresden Germany

National Synchrotron Radiation Research Center 101 Hsin‐Ann Road Hsinchu 30076 Taiwan

Synchrotron Soleil L'Orme des Merisiers St‐Aubin Gif‐sur‐Yvette Cedex 91192 France

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Xiamen University

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