催化作用
价(化学)
燃烧
催化燃烧
空位缺陷
材料科学
金属
铂金
纳米技术
密度泛函理论
化学工程
无机化学
结晶学
化学
物理化学
计算化学
冶金
有机化学
工程类
作者
Dong Feng,Xiao Liang,Zedong Zhang,Hao Yin,Dingsheng Wang,Junhua Li,Yadong Li
标识
DOI:10.1002/adma.202401055
摘要
Abstract Atomic metal catalysts have unique electronic, structural, and catalytic properties, which are widely used in the field of catalysis. However, designing new simple synthesis methods to fabricate atomic metal catalysts is a challenge in catalytic applications. Herein, a one‐step precursor combustion strategy is presented that starts directly from precursors of metal salts, using a spontaneous combustion process convert platinum nitrate to atomic Pt sites. The atomic Pt sites with low valence are anchored in the formed interface between grains on vacancy‐enriched CeO 2 nanosheets. The obtained Pt/CeO 2 ‐2 catalyst exhibits much higher three‐way catalytic activities at low temperatures than Pt/CeO 2 ‐C catalysts prepared using the traditional impregnation method. Density functional theory calculations show that the generated lower valent Pt atoms in the CeO 2 interface promote catalytic activity through reducing the energy barrier, and lead to an overall improvement of three‐way catalytic activities. This facile strategy provides new insights into the study of the properties and applications of atomic noble metal catalysts.
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