期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 11, 期 19, 页码 6380-6389出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cy00964h
关键词
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资金
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [2019R1C1C1005022]
- Korea Ministry of Environment [YLWE-19-001]
- Regional Innovation Strategy (RIS) through the National Research Foundation of Korea (NRF) - Ministry of Education (MOE)
- National Research Foundation of Korea [2019R1C1C1005022] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study discusses the fabrication of inexpensive, high-performance Cu/CeO2 catalysts, where the ratios of precipitants affect the catalytic performance and the CeO2 support should be synthesized at a specific ratio for high activity. This catalyst exhibits the highest CO conversion at high temperatures, indicating the significant influence of various physicochemical properties on catalytic performance.
The water-gas shift (WGS) reaction has been attracting interest for on-site small-scale production of hydrogen. This study discusses the fabrication of inexpensive, high-performance Cu/CeO2 catalysts. To synthesize these catalysts, CeO2 supports were prepared using K2CO3/KOH as precipitants in different ratios. First, 20 wt% Cu was loaded onto the prepared CeO2 supports through incipient wetness impregnation. The ratios of the precipitants affect the physicochemical properties of the Cu/CeO2 catalysts, which in turn affects the catalytic performance. On increasing the K2CO3/KOH ratio, the surface area, oxygen storage capacity, and reducibility increased, while Cu dispersion decreased. To achieve high activity of Cu/CeO2 catalysts, the CeO2 support should be synthesized at the K2CO3 : KOH ratio of 3 : 1. This Cu/CeO2 catalyst exhibits the highest CO conversion between 200 and 400 degrees C, even at a very high gas hourly specific velocity of 50 102 h(-1). This result shows that the catalytic performance is greatly influenced by various physicochemical properties such as surface area, oxygen storage capacity, Cu dispersion, and reducibility.
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