DataVXACS Energy LettersPaper
journal article·2025-06-13Open access

Regulating the Oxygen Evolution Mechanism through In Situ Reconstruction of Ru-Modified Manganese Oxybromide

Ci Lin, Tsung-Yi Chen, Tao Zhou, Yingqiang Wu, Ching Kit Tommy Wun, Weicheng Chen, Han-Yi Chen, Vincent Tung, Zhengxiao Guo, Tsz Woon Benedict Lo, Liang Cai, Yida Deng, Philip C. Y. Chow

ACS Energy Letters· Volume 10· Issue 6
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Source abstract

Abstract

High Resolution Image Download MS PowerPoint Slide Regulating the oxygen evolution reaction (OER) mechanism presents a promising yet challenging approach to address the performance-stability trade-off of acidic water oxidation catalysts. Here we demonstrate the regulation of the OER mechanism through in situ surface reconstruction of manganese oxybromides (MOB) catalysts modified with single-atom ruthenium (Ru-MOB). In situ Raman spectroscopy reveals that Ru incorporation intensifies the inherent, reversible surface reconstruction of MOB, resulting in the formation of a γ-MnO 2 layer with an onset potential approximately 100 mV lower. Various operando/in situ characterizations and theoretical calculations show that the reconstructed Ru-MOB significantly suppresses the lattice oxygen mechanism while simultaneously enhancing the adsorbate evolution mechanism. In an electrochemical cell, the reconstructed Ru-MOB drives acidic OER with an overpotential about 90 mV lower at 10 mA cm –2 compared to pure MOB, and it shows negligible performance degradation for over 1400 h. Our work offers a design strategy for the future development of acidic OER catalysts.
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Research context

Catalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science · Advancements in Solid Oxide Fuel Cells

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

Affiliations

Department of Mechanical Engineering

The University of Hong Kong

National Synchrotron Radiation Research Center

Department of Chemistry

Department of Material Science and Engineering

Hainan University

Department of Applied Biology and Chemical Technology

Hong Kong Polytechnic University

Department of Materials Science and Engineering

National Tsing Hua University

Department of Chemical System Engineering

The University of Tokyo

Center for Sustainability and Energy Technologies

Chang Gung University

School of Sustainable Energy and Resources

Nanjing University

Funding

Environment and Ecology Bureau · Research Grants Council, University Grants Committee · University of Hong Kong · Core Research for Evolutional Science and Technology · Japan Society for the Promotion of Science · Japan Science and Technology Agency · Nanjing University · National Natural Science Foundation of China · University of Tokyo · Excellent Young Scientists Fund

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