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*, Xiaodan Zhang*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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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.
Original languageEnglish
Article number2294
JournalNature Communications
Volume13
Issue number1
Number of pages10
ISSN2041-1723
DOIs
Publication statusPublished - 2022

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