合成气
部分氧化
催化作用
成核
铑
氧化物
甲烷
化学工程
相(物质)
金属
纳米颗粒
材料科学
亚稳态
化学
纳米技术
冶金
有机化学
工程类
作者
Younhwa Kim,Sungsu Kang,Dohun Kang,Kyung Rok Lee,Chang Myeon Song,Jae Hyuck Sung,Ji Soo Kim,Hyunjoo Lee,Jung Won Park,Jongheop Yi
标识
DOI:10.1002/anie.202110292
摘要
Single-phase formation of active metal oxides on supports has been vigorously pursued in many catalytic applications to suppress undesired reactions and to determine direct structure-property relationships. However, this is difficult to achieve in nanoscale range because the effect of non-uniform metal-support interfaces becomes dominant in the overall catalyst growth, leading to the nucleation of various metastable oxides. Herein, we develop a supported single-phase corundum-Rh2 O3 (I) nanocatalyst by utilizing controlled interaction between metal oxide and h-BN support. Atomic-resolution electron microscopy and first-principle calculation reveal that single-phase formation occurs via uniform and preferential attachment of Rh2 O3 (I) (110) seed planes on well-defined h-BN surface after decomposition of rhodium precursor. By utilizing the Rh/h-BN catalyst in methane partial oxidation, syngas is successfully produced solely following the direct route with keeping a H2 /CO ratio of 2, which makes it ideal for most downstream chemical processes.
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