失真(音乐)
制作
吸附
热稳定性
催化作用
材料科学
甲醇
铂金
金属
热的
化学物理
氧气
化学工程
纳米技术
Atom(片上系统)
化学
热力学
物理化学
物理
光电子学
计算机科学
有机化学
冶金
CMOS芯片
放大器
嵌入式系统
替代医学
病理
工程类
医学
作者
Zeyu Jiang,Meizan Jing,Xiangbo Feng,Jingchao Xiong,Chi He,Mark Douthwaite,Lirong Zheng,Weiyu Song,Jian Liu,Zhiguo Qu
标识
DOI:10.1016/j.apcatb.2020.119304
摘要
Exploring thermally robust single atom catalysts (SACs) is of great significance. Here, we develop a universal strategy for stabilizing Pt atoms on the mono-oxygen vacancies of CeO2 with diverse exposed facets. The stabilization mechanism was proposed that the formed Pt-O-Ce interface will be taken into distortion spontaneously to keep thermodynamics stable through strong metal-support interactions. The highest degree of Pt-O-Ce distortion is achieved over Pt1-CeO2{100} material, which exhibits exceptional efficiency and thermal stability for oxygenated hydrocarbon removal. The enhanced adsorption capacity of O2 and methanol confirmed in the distortion interface is seen as another crucial reason for improving the stability of SACs. Methanol oxidation on Pt1-CeO2{100} obeys the L-H mechanism under relatively low temperature and then goes through to the MVK mechanism with temperature increasing. We believe that these results would bring new opportunities in the fabrication of SACs and applications of them in thermal reactions.
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