The Doping of Al3+ at the Tetrahedral Site of Spinel Mn3O4 for Electrocatalytic Water Oxidation

Xiaohan Liu; Shujiao Yang; Sisi Li; Ting Wang; Xueqing Gao; Yu Chen; Wei Zhang

doi:10.1002/chem.202403720

The Doping of Al³⁺ at the Tetrahedral Site of Spinel Mn₃O₄ for Electrocatalytic Water Oxidation

Chemistry. 2024 Dec 31:e202403720. doi: 10.1002/chem.202403720. Online ahead of print.

Authors

Xiaohan Liu¹, Shujiao Yang¹, Sisi Li¹, Ting Wang¹, Xueqing Gao², Yu Chen³, Wei Zhang¹

Affiliations

¹ Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China.
² College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China.
³ School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China.

PMID: 39737620
DOI: 10.1002/chem.202403720

Abstract

Spinel oxides have attracted much attention for electrocatalytic water oxidation. Specially, the Mn-based spinel structures merits fundamental investigation, as Mn is involved in water oxidation in natural photosynthesis. Herein, Al-doped Mn₃O₄ spinel electrocatalyst was prepared for water oxidation. The Al cations selectively occupy the tetrahedral sites of Mn₃O₄ spinel structure, leaving Mn(III) at the catalytically critical octahedral sites. The substitution of Al³⁺ regulated the electronic structure of Mn₃O₄, induced lattice distortion and produced higher concentration of oxygen vacancy to promote the water oxidation performance.

Keywords: Al-doping; Electrocatalysis; Manganese oxide; Spinel oxides; Water oxidation.