期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 16, 页码 9648-9657出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.01.198
关键词
Hydrogen production; Low-temperature water gas shift; Nb promoter; Cu-CeO2; Reducibility
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2019R1C1C1005022]
- Korea Ministry of Environment as Waste to Energy-Recycling Human Resource Development Project [YL-WE-19-001]
- National Research Foundation of Korea [2019R1C1C1005022] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The effect of Nb promotion over a Cu-CeO2 catalyst was investigated in the lowtemperature water gas shift reaction. The Nb loading amount was systematically varied from 0 to 5 wt% for the Cu-Nb-CeO2 catalyst, and the 1 wt% Nb promoted Cu-Nb-CeO2 catalyst exhibited the highest catalytic performance even at extremely high GHSV of 72,152 h(-1). The catalysts were characterized through various techniques such as BrunauerEmmet-Teller measurements, X-ray diffraction, N-2 O-chemisorption, H-2-temperature programmed reduction, X-ray photoelectron spectroscopy, and transmission electron microscopy. It was found that the superior performance of the 1 wt% Nb promoted Cu-Nb-CeO2 catalyst was due to its enhanced reducibility, high BET surface area, small metallic Cu crystallite size, and high number of oxygen vacancies. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd.
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