Pt/CuCrO催化剂上CO氧化反应及抗H_2O和抗CO_2性能研究  

A study of Pt/Cu Cr O catalysts for CO oxidation and resistance to H_2O and CO_2

作　　者：邓芸 朱丽 贾爱平 鲁继青[1] 罗孟飞[1] 

机构地区：[1]浙江师范大学物理化学研究所,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2017年第4期427-434,共8页Journal of Zhejiang Normal University:Natural Sciences

基　　金：浙江省自然科学青年基金资助项目(LQ17B030001)

摘　　要：制备了负载型Pt/CuCrO催化剂,并进行了CO氧化及其抗H_2O和抗CO_2的性能研究.结果表明:载体的晶型结构改变了其可还原性和活性氧物种数量,从而影响催化剂的反应活性及抗H_2O和抗CO_2的能力;经400~600℃焙烧的载体为尖晶石型CuCr_2O_4氧化物,具有很好的可还原性和较高的活性氧物种数量,因此催化剂具有良好的CO氧化活性和优异的抗H_2O和抗CO_2的能力;而800℃焙烧的载体为铜铁矿型CuCrO_2氧化物,其CO氧化活性较低,且不具备抗H_2O和抗CO_2能力.A series of Pt/Cu Cr O catalysts were prepared and investigated for CO oxidation and resistance to H_2O and CO_2. The results showed that the crystalline structure of the support had significant influence on its reducibility and the amount of active oxygen species,which consequently played important roles in the catalytic performance of the catalysts. The support calcined at 400 ~ 600 ℃ had a spinel structure（ CuCr_2O_4）,had good reducibility and high amount of active oxygen species,which resulted in good performance in CO oxidation and excellent resistance to H_2O and CO_2. However,the support calcined at 800 ℃ had a delafossite structure（ CuCrO_2）,had low reducibility and less amount of active oxygen species,which resulted in inferior performance in CO oxidation and poor resistance to H_2O and CO_2.

关 键 词：PT催化剂 CO氧化 Cu Cr2O4 抗H2O 抗CO2 

分 类 号：O643.32[理学—物理化学]