Effect of precipitation sequence on physicochemical properties of CeO2 support for hydrogen production from low-temperature water-gas shift reaction. (13th September 2018)

• Record Type: Journal Article
• Authors: Na, Hyun-Suk; Shim, Jae-Oh; Ahn, Seon-Yong; Jang, Won-Jun; Jeon, Kyung-Won; Kim, Hak-Min; Lee, Yeol-Lim; Kim, Kyoung-Jin; Roh, Hyun-Seog
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 37(2018)
• Page Start: 17718
• Page End: 17725
• Publication Date: 2018-09-13
• Subjects: Water-gas shift -- Titration method -- Cu/CeO2 -- Physicochemical properties; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.08.009
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A one-step reverse precipitation method has been developed to prepare nano-sized ceria (CeO2 ) support with controlled physicochemical properties for low temperature water-gas shift (LT-WGS) reaction. The nano-sized CeO2 support prepared by reverse precipitation method has a high Brunauer-Emmett-Teller (BET) surface area of 162.8 m 2 /g. To compare catalytic activity with that of CeO2 prepared by normal precipitation method, 5 wt% Cu was employed as the active metal, coupled to the CeO2 support. The catalytic activity of CeO2 supported Cu catalyst prepared by reverse precipitation method was evaluated for the first time in LT-WGS reaction. Notably, the CeO2 – R supported Cu catalyst, prepared by reverse precipitation method, showed higher CO conversion and turnover frequency (TOF) values than CeO2 –N supported Cu catalyst prepared by normal precipitation method. Graphical abstract: Image 1 Highlights: Nano-sized CeO2 is synthesized by a simple/one-step reverse precipitation method. The titration sequence affected the physicochemical properties of the Cu/CeO2 catalysts. Cu/CeO2 –R prepared by reverse precipitation method exhibited the higher catalytic activity. Cu/CeO2 –R is suitable for large-scale applications.