Alumina supported platinum-ceria catalyst for reverse water gas shift reaction  

作　　者：Na Jiang Weiwei Wang Haoxin Liu Meiyao Wu Chunjiang Jia 

机构地区：[1]Key Laboratory for Colloid and Interface Chemistry,Key Laboratory of Special Aggregated Materials,School of Chemistry and Chemical Engineering,Shandong University,Jinan 250100,China

出　　处：《Journal of Rare Earths》2025年第2期284-294,I0002,共12页稀土学报(英文版)

基　　金：Project supported by the National Science Fund for Distinguished Young Scholars of China(22225110);the National Key Research and Development Program of China(2021YFA1501103);the National Science Foundation of China(22075166,22271177);the Young Scholars Program of Shandong University。

摘　　要：The activation of CO_(2)molecules is a fundamental step for their effective utilization.Constructing highdensity oxygen vacancies on the surface of reducible oxides is pivotal for the activation of CO_(2).In this work,we prepared a series of 0.5PtxCe/Al_(2)O_(3)(x=1,5,10,or 20)catalysts with varying Ce loading and 0.5 wt%of Pt for the reverse water gas shift(RWGS)reaction.The size of CeO_(2)particle increases with Ce loading.Remarkably,the 0.5Pt5Ce/Al_(2)O_(3) catalyst with an average CeO_(2)particle size of 5.5 nm exhibits a very high CO_(2)conversion rate(116.4×10^(-5)mol_(CO_(2))/(g_(cat)·s))and CO selectivity(96.1%)at 600℃.Our experimental findings reveal that the small-size CeO_(2)in 0.5Pt5Ce/Al_(2)O_(3) possesses a greater capacity to generate reactive oxygen vacancies,promoting the adsorption and activation of CO_(2).In addition,the oxygen vacancies are cyclically generated and consumed during the reaction,which contributes to the elevated catalytic performance of the catalyst.This work provides a general strategy to construct rich oxygen vacancies on CeO_(2)for designing high-performance catalysts in C_(1) chemistry.

关 键 词：CO_(2)activation CERIA Oxygen vacancies Size-effect Reverse water gas shift reaction Rare earths 

分 类 号：O64[理学—物理化学]