催化作用
离解(化学)
纳米材料
纳米颗粒
金属
合金
氧化物
贵金属
纳米技术
材料科学
Atom(片上系统)
化学
化学工程
物理化学
冶金
工程类
嵌入式系统
生物化学
计算机科学
作者
Yanru Wang,Qingfeng Zhuang,Rui Cao,Yang Li,Fei‐Yue Gao,Zhao‐Rui Li,Zhen He,Lei Shi,Yu‐Feng Meng,Xu Li,Jin-Long Wang,Yu Duan,Min‐Rui Gao,Xiao Zheng,Shu‐Hong Yu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-05-09
卷期号:22 (10): 4232-4239
被引量:19
标识
DOI:10.1021/acs.nanolett.2c01314
摘要
Picturing the atomic migration pathways of catalysts in a reactive atmosphere is of central significance for uncovering the underlying catalytic mechanisms and directing the design of high-performance catalysts. Here, we describe a reduction-controlled atomic migration pathway that converts nanoparticles to single atom alloys (SAAs), which has remained synthetically challenging in prior attempts due to the elusive mechanism. We achieved this by thermally treating the noble-metal nanoparticles M (M = Ru, Rh, Pd, Ag, Ir, Pt, and Au) on metal oxide (CuO) supports with H2/Ar. Atomic-level characterization revealed such conversion as the synergistic consequence of noble metal-promoted H2 dissociation and concomitant CuO reduction. The observed atomic migration pathway offers an understanding of the dynamic mechanisms study of nanomaterials formation and catalyst design.
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