纳米团簇
介孔材料
材料科学
催化作用
金属
表面改性
化学工程
纳米技术
热稳定性
化学
有机化学
工程类
冶金
作者
Mingzhen Hu,Xinhu Liang,Shoujie Liu,Zengjian Cai,Fengyi Shen,Shitu Yang,Zhe Wang,Guodong Sun,Hao Ren,Yanan Cao,Shuo Wang,Shu Zhao,Kebin Zhou
标识
DOI:10.1021/acs.chemmater.3c00974
摘要
Mesoporous support-encapsulated fine-size metal nanoclusters hold great potential for catalytic applications by virtue of their high reactivity and fast mass transport kinetics but suffer greatly from particle aggregation and/or sintering, especially under high reaction temperatures. Here, we report an inner surface-confinement strategy to stabilize a variety of ultrafine metal nanoclusters (M = Pt, Pd, Ni, and Ag) inside mesoporous silica supports. The strategy is based on the selective N functionalization of the inner surface of mesopores, which not only assures the direct growth of ultrafine metal nanoclusters therein but also endows the active metal nanoclusters with excellent thermal stability via N-metal coordination. Remarkably, the mesopore-encapsulated N-coordinated Pt nanoclusters are particularly selective for making α,β-unsaturated alcohol, benefiting from their energetically favored reaction pathway for end-on binding α,β-unsaturated aldehyde reactants and heterolytic dissociation of hydrogen. The synthetic methodology is expected to provide new guidelines to improve the thermal stability of mesopore-encapsulated metal nanoclusters for superb catalysis.
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