自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 4    April 2018

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Preparation, characterization and catalytic performance of Cu nanowire catalyst for CO2 hydrogenation
ZHANG Xiao-yan(张晓艳)1, 3, WANG Ming-hua(王明华)1, CHEN Zhong-yi(陈忠翼)1,P. XIAO2, P. WEBLEY2, ZHAI Yu-chun(翟玉春)1

1. School of Metallurgy, Northeastern University, Shenyang 110819, China; 2. Department of Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia; 3. Library of Tongren College, Tongren 554300, China

Abstract:Pure Cu nanowires as catalyst were prepared by electrochemical deposition and were used in CO2 hydrogenation to methanol. The active sites of the Cu based catalyst were discussed. The performance and structural development of the catalyst were observed during CO2 hydrogenation. A mechanism for the deactivation of the catalyst was discussed. The key factors that affect the deactivation of the catalyst were found. Cu nanowire sample was characterized by SEM, EDS, XRD, and BET. The results show that Cu nanowires have very high sintering resistance and catalytic stability. This helps to develop high performance catalysts. The changes in the grain size, SEM morphology and catalytic properties of the sample during CO2 hydrogenation show that the migration of the Cu atoms on the surface of the Cu nanowires can occur. Continuous migration of Cu atoms and sintering of Cu grains can lead to flow blockage in gas channels. The gas channel flow blockage or the sintering of Cu grains can lead to deactivation of the catalyst. However, the shape of catalytic performance curve indicates that the main reason for the deactivation of the catalyst is the gas channel flow blockage.

 

Key words: CO2 hydrogenation; methanol; Cu nanowire; migration; sintering; flow blockage

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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