articleNature CommunicationsApr 22, 2024GOLD OA

Highly efficient anion exchange membrane water electrolyzers via chromium-doped amorphous electrocatalysts

SLSicheng LiTLTong LiuWZWei ZhangMWMingzhen WangHZHuijuan Zhang

University of Science and Technology of China · National Synchrotron Radiation Laboratory · +1 more institution

PubMed
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Abstract

Abstract In-depth comprehension and modulation of the electronic structure of the active metal sites is crucial to enhance their intrinsic activity of electrocatalytic oxygen evolution reaction (OER) toward anion exchange membrane water electrolyzers (AEMWEs). Here, we elaborate a series of amorphous metal oxide catalysts (FeCrO x , CoCrO x and NiCrO x ) with high performance AEMWEs by high-valent chromium dopant. We discover that the positive effect of the transition from low to high valence of the Co site on the adsorption energy of the intermediate and the lower oxidation barrier is the key factor for its increased activity by synchrotron radiation in-situ techniques. Particularly, the CoCrO x anode…

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Topics & keywords

Topics
Keywords
  • Amorphous solid
  • Oxygen evolution
  • Materials science
  • Electrolysis of water
  • Catalysis
  • Valence (chemistry)
  • Transition metal
  • Anode
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