Rh-Mn/tungsten carbides for direct synthesis of mixed alcohols from syngas: Effects of tungsten carbide phases
- Authors
- Da Won, Ba; Jeong, Min Hye; Kim, Myeong Hun; Chung, Chan-Hwa; Moon, Dong Ju; Suh, Young-Woong; Baik, Joon Hyun; Bae, Jong Wook
- Issue Date
- Jan-2018
- Publisher
- ELSEVIER SCIENCE BV
- Citation
- MICROPOROUS AND MESOPOROUS MATERIALS, v.255, pp 44 - 52
- Pages
- 9
- Journal Title
- MICROPOROUS AND MESOPOROUS MATERIALS
- Volume
- 255
- Start Page
- 44
- End Page
- 52
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/146939
- DOI
- 10.1016/j.micromeso.2017.07.026
- ISSN
- 1387-1811
1873-3093
- Abstract
- Effects of the crystalline tungsten carbide (WxC) phases on an ordered mesoporous bimetallic Rh-Mn/WxC, which were prepared by changing carbon source to tungsten (C/W) ratios of the WxC support using a hard-template of an ordered mesoporous SBA-15, were investigated for a direct synthesis of mixed alcohols by CO hydrogenation from syngas. The C/W ratios on the mesoporous Rh-Mn/WxC showed a significantly different catalytic activity, especially on the C-1 - C-3 alcohol productivity. The Rh-Mn/WxC prepared at C/W molar ratio of 10 having a metastable W2C main phase (Rh-Mn/WxC(10)) revealed a higher CO conversion of 8.1% and selectivity to higher alcohols of 54.4% compared to other catalysts having a main crystalline phases of WO3 or WC. The enhanced catalytic activity and selectivity to mixed alcohols on the Rh-Mn/WxC(10) were attributed to the largely exposed smaller active Rh nanoparticles with its stronger interactions with the metastable W2C phases. The superior activity was originated from the intimate interactions of Rh nanoparticles with Mn promoter by maintaining proper oxidation states confirmed by surface ratios of the metallic Rh to oxidized Rhn+ species. The stable preservation of the ordered mesoporous structures of the W2C phase in the amorphous carbon matrixes significantly altered the chemical stat
- Files in This Item
-
Go to Link
- Appears in
Collections - 공과대학 > 화공생명공학부 > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.