羟基磷灰石负载纳米Au催化剂用于CO低温氧化的研究进展  

Recent progress on low-temperature CO oxidation over hydroxyapatite supported nano-Au catalysts

作　　者：乔莎 苏敏 惠武卫 赵丹 张明胜 张新波 郑珩 王磊 赵英 雷菊梅 汤雪梅 Qiao Sha;Su Min;Hui Wuwei;Zhao Dan;Zhang Mingsheng;Zhang Xinbo;Zheng Heng;Wang Lei;Zhao Ying;Lei Jumei;Tang Xuemei(State Key Laboratory ofIndustrial Vent Gas Reuse,National Engineering Research Center for C1 Chemistry,Southwest Institute of Chemical Co.,Ltd.,Chengdu 610225,Sichuan,China)

机构地区：[1]西南化工研究设计院有限公司国家碳一化学工程技术研究中心工业排放气综合利用国家重点实验室,四川成都610225

出　　处：《工业催化》2022年第9期1-7,共7页Industrial Catalysis

基　　金：四川省科技计划项目(2020ZHCG0014)。

摘　　要：Au催化剂在低温下具有优异的CO催化氧化作用,但其高温下易烧结,催化活性降低,催化剂寿命短。羟基磷灰石(HAp)作为新型载体,具有丰富的羟基和磷酸根,帮助锚定Au纳米颗粒,起到了良好的分散和稳定作用。加入还原性氧化物作为复合载体,增加了对O_(2)的活化能力,并起到了进一步分散Au纳米颗粒的作用,显著地提高了催化剂在低温CO氧化反应中的活性。微观下可观察到HAp对Au纳米颗粒的包覆作用,表现出金属与载体的强相互作用。Gold catalysts exhibit extremely high performance in CO oxidation at low temperatures.However,gold nanoparticles are easily sintered under high temperature,leading to low catalytic activity and short lifetime.Hydroxyapatite(HAp),a new support for catalysts,helps to anchor gold nanoparticles with its OH and phosphate groups,so gold nanoparticles can be highly dispersed on HAp,which makes the catalysts stable at high temperature.Reducible oxides are added into Au/HAp as promotes,which can help to accelerate the activation of O_(2),further disperse Au nanoparticles,and increase the catalytic activity in CO oxidation.It is observed that Au nanoparticles are partially encapsulated into HAp on its surface,which shows strong metal-support interaction(SMSI).

关 键 词：催化剂工程 CO低温氧化 羟基磷灰石 纳米Au催化剂 金属与载体的强相互作用 抗烧结催化剂 

分 类 号：TQ426.6[化学工程] X701[环境科学与工程—环境工程]