催化作用
铜
氧化物
材料科学
氧化铜
化学工程
纳米技术
化学
有机化学
冶金
工程类
作者
Kazutaka Sonobe,Makoto Tanabe,Kimihisa Yamamoto
出处
期刊:ACS Nano
[American Chemical Society]
日期:2020-02-06
卷期号:14 (2): 1804-1810
被引量:53
标识
DOI:10.1021/acsnano.9b07582
摘要
Subnanoparticles (SNPs) with ultrasmall particle sizes (<1 nm) have potential to provide catalytic activity that is superior to that of nanoparticles. Size-controlled CunOx (n = 12, 28, and 60) materials supported on zirconia, prepared using a dendritic macromolecular reactor, exhibited increased ionicity of the Cu–O bonds with a decrease in size of the particles, which was suggested on the basis of the peak intensity in the Cu 2p3/2 region. The polarization of the Cu–O bonds in the ultrasmall copper oxides provides size-dependent catalytic activity in aerobic oxidation of the CH3 group bonded with aromatic rings. The smallest Cu12Ox materials achieved an excellent large turnover number (TON = 40 206) without any significant deactivation.
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