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Rare-earth-based catalysts for oxygen reduction reaction.

Authors :
Man, Xiao
Chang, Ying
Jia, Jingchun
Source :
Molecular Catalysis. Aug2024, Vol. 565, pN.PAG-N.PAG. 1p.
Publication Year :
2024

Abstract

• The ORR reaction pathway and catalytic mechanism of rare earth-based catalysts are briefly described. • The latest progress of rare earth-based ORR catalysts is systematically summarized. • Rare earth elements play an indispensable role in improving the activity of electrocatalytic materials through the formation of heterostructure interface, doping/substitution engineering, strain effect, etc. Rare earth (RE) metals have special 4f shell electronic configuration and special physical and chemical properties. Therefore, rare-earth-based catalysts are extensive used in the electrochemical cathodic oxygen reduction reaction (ORR) of proton exchange membrane (PEM) fuel cells. However, the low conductivity and low active site density of these catalysts limit their effective application in electrochemistry. The results show that the oxygen reduction activity and stability of rare-earth-based catalysts can be significantly improved by controlling the electronic structure and spatial configuration of active sites through doping of metal/nonmetal elements. In this paper, the main research work on metal/nonmetallic element doping to improve the performance of rare earth-based-catalysts in recent years was reviewed, including noble metal element doping, non-noble metal element doping, non-metallic element doping, perovskite and so on. The paper further summarized and pointed out the problems and challenges faced by rare-earth-based catalysts, and looked forward to their development prospects and future research directions. In recent years, rare earth metals have been widely used in the electrochemical cathodic oxygen reduction (ORR) of fuel cells because of their special 4f shell electronic structure and special physical and chemical properties. However, the low conductivity and low active site density of these catalysts limit their effective application in electrochemistry. The results show that the electronic structure and spatial configuration of the active sites can be significantly improved by doping metal/non-metal elements, which can significantly improve the oxygen reduction activity and stability of the rare-earth based catalysts. In this paper, the main research work on improving the performance of rare earth-based catalysts doped with metal/non-metal elements at home and abroad in recent years is reviewed, and their development prospects and future prospects are also prospected. [Display omitted] [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
24688231
Volume :
565
Database :
Academic Search Index
Journal :
Molecular Catalysis
Publication Type :
Academic Journal
Accession number :
178811328
Full Text :
https://doi.org/10.1016/j.mcat.2024.114389