Gold nanoparticles on Fe-doped Co_(3)O_(4) for enhanced low-temperature CO oxidation  

作　　者：Jianfang Liu Hongwei Huang Jie Yang Laishuan Liu Yu Li 

机构地区：[1]Shanxi Province Key Laboratory of Chemical Process Intensification,School of Chemistry and Chemical Engineering,North University of China,Taiyuan 030051,China

出　　处：《Chinese Journal of Chemical Engineering》2025年第2期175-186,共12页中国化学工程学报(英文版)

基　　金：supported by the Fundamental Research Program of Shanxi Province of China(202203021211103,202303021212172,202403021211196).

摘　　要：A series of Au/Co_(x)Fe_(3-x)O_(4) catalysts was synthesized using the sol-deposition method by depositing 2–5 nm Au particles on Fe-doped Co_(3)O_(4).Co_(2)FeO_(4),with a Co/Fe molar ratio of 2:1,exhibited higher specific surface area,Co^(3+)/Co^(2+)ratio,and oxygen vacancy content compared to Co_(3)O_(4).As a result,it displayed better performance in CO oxidation,achieving a total conversion temperature(T100)of 96℃.Au greatly improved the catalytic efficiency of all Co_(x)Fe_(3-x)O_(4) samples,with the 0.2%Au/Co_(2)FeO_(4) catalyst achieving a further decrease in T100 to 73℃.Stability tests conducted at room temperature on the 1%Au/Co_(x)Fe_(3-x)O_(4) catalysts demonstrated a slowed deactivation rate after Fe-doping.The reaction pathway for CO oxidation catalyzed by Au/Co_(2)FeO_(4) followed the Mars-van Krevelen mechanism.

关 键 词：Gold nanoparticles Co_(3)O_(4) FE-DOPING CO oxidation Catalytic mechanisms 

分 类 号：O643.36[理学—物理化学]