3.Effect of Ｒare Earth oxide doping on theperformance of Pt-based catalysts
Author: MENG Xianghui；GUO Ｒuihua；AN Shengli；TIAN Xiao；HUANG Yarong
Abstract:
Pt-Pr 6 O 11 / G and Pt-Sm 2 O 3 / G catalysts ( G: graphene) were prepared by microwave synthesis． It not only reduces the a-mount of Pt，but also improves the dispersion and catalytic performance of the catalyst． TEM test shows that the two groups of catalystswith Ｒare Earth had very high dispersion and more uniform distribution of catalyst particles． The electrochemical tests show that the cat-alytic performance is the best when the ratio of Pt to Ｒare Earth oxides is 1∶ 1，and the electrochemical surface areas are 42． 6 m 2 / gand 44． 01 m 2 / g，respectively． The peak current densities are 764． 28 mA·cm － 2 and 800． 42 mA·cm － 2 ，respectively． Steady-statecurrent densities are 201． 88 mA · cm － 2 and 193． 75 mA · cm － 2 ，respectively． The catalytic performance of Pt-Pr 6 O 11 / G andPt-Sm 2 O 3 / G is 2． 64 times and 2． 76 times higher than that of commercial Pt / C，respectively．
Keywords: Direct Ethanol Fuel Cell ( DEFC) ; Pt-based catalyst; Ｒare Earth oxides; microwave method; electrocatalysis steel; Goss grains; abnormal growth; texture
Full Text Link: https://link.cnki.net/doi/10.16559/j.cnki.2095-2295.2025.02.003