Efficient and stable noble-metal-free catalyst for acidic water oxidation

Sanjiang Pan, Hao Li, Dan Liu, Rui Huang, Xuelei Pan, Dan Ren, Jun Li, Mohsen Shakouri, Qixing Zhang, Manjing Wang, Changchun Wei, Liqiang Mai, Bo Zhang, Ying Zhao, Zhenbin Wang (), Michael Graetzel () and Xiaodan Zhang ()
Additional contact information
Sanjiang Pan: Solar Energy Research Center, Nankai University
Hao Li: Tohoku University
Dan Liu: Northwestern Polytechnical University (NPU)
Rui Huang: Fudan University
Xuelei Pan: Wuhan University of Technology
Dan Ren: Ecole Polytechnique Federale de Lausanne
Jun Li: Ecole Polytechnique Federale de Lausanne
Mohsen Shakouri: Canadian Light Source, Inc. (CLSI)
Qixing Zhang: Solar Energy Research Center, Nankai University
Manjing Wang: Solar Energy Research Center, Nankai University
Changchun Wei: Solar Energy Research Center, Nankai University
Liqiang Mai: Wuhan University of Technology
Bo Zhang: Fudan University
Ying Zhao: Solar Energy Research Center, Nankai University
Zhenbin Wang: Technical University of Denmark
Michael Graetzel: Solar Energy Research Center, Nankai University
Xiaodan Zhang: Solar Energy Research Center, Nankai University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Developing non-noble catalysts with superior activity and durability for oxygen evolution reaction (OER) in acidic media is paramount for hydrogen production from water. Still, challenges remain due to the inadequate activity and stability of the OER catalyst. Here, we report a cost-effective and stable manganese oxybromide (Mn7.5O10Br3) catalyst exhibiting an excellent OER activity in acidic electrolytes, with an overpotential of as low as 295 ± 5 mV at a current density of 10 mA cm−2. Mn7.5O10Br3 maintains good stability under operating conditions for at least 500 h. In situ Raman spectroscopy, X ray absorption near edge spectroscopy, and density functional theory calculations confirm that a self-oxidized surface with enhanced electronic transmission capacity forms on Mn7.5O10Br3 and is responsible for both the high catalytic activity and long-term stability during catalysis. The development of Mn7.5O10Br3 as an OER catalyst provides crucial insights into the design of non-noble metal electrocatalysts for water oxidation.

Date: 2022
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DOI: 10.1038/s41467-022-30064-6

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