Optimization of a highly active nano-sized Pt/CeO2 catalyst via Ce(OH)CO3 for the water-gas shift reaction

Dae-Woon Jeong, Won-Jun Jang, Jae-Oh Shim, Won-Bi Han, Hak-Min Kim, Yeol-Lim Lee, Jong Wook Bae and Hyun-Seog Roh

Renewable Energy, 2015, vol. 79, issue C, 78-84

Abstract: Crystalline cerium hydroxy carbonate (CHC: Ce(OH)CO3) was prepared by a novel precipitation/digestion method at room temperature in air. The nano-sized CeO2 supports were obtained by the thermal decomposition of CHC and the Pt/CeO2 catalysts were prepared by an incipient wetness impregnation method. The pre-calcination temperature and aging time were optimized to obtain a highly active Pt/CeO2 catalyst for the water gas shift reaction (WGS). The Pt/CeO2 catalyst exhibited the highest CO conversion (82%) and the lowest activation energy (55 kJ/mol) at a very high gas hourly space velocity (GHSV) of 45,515 h−1 when the optimized synthesis parameter (pre-calcined temperature = 400 °C and aging time = 4 h) was used in the synthesis of CeO2. This is mainly due to the high BET surface area, nano-sized CeO2, and intimate interaction between Pt and CeO2.

Keywords: Cerium hydroxy carbonate (CHC: Ce(OH)CO3); Nano-sized CeO2; Pt; Pre-calcination temperature; Aging time; Water gas shift (WGS) (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:79:y:2015:i:c:p:78-84

DOI: 10.1016/j.renene.2014.07.041

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