Effects of passivation on synthesis, structure and composition of molybdenum carbide supported platinum water–gas shift catalysts
作者： Brian M. Wyvratt , Jason R. Gaudet , Levi T. Thompson
DOI: 10.1016/J.JCAT.2015.07.023
关键词:
摘要: Abstract High surface area molybdenum carbides are attractive for use as catalysts and supports. Due to their pyrophoricity, typically passivated prior use. Research described in this paper compared the synthesis, structural compositional properties, water–gas shift activities of produced by depositing Pt onto unpassivated Mo 2 C. Passivation had a profound effect on character interactions between precursor salt (H PtCl 6 ) Nanoscale metal particles were deposited C while very large (p-Mo C). In situ X-ray absorption spectroscopy revealed reduction 4+ contact with commensurate oxidation Mo. Water–gas significantly higher Pt/Mo Pt/p-Mo catalyst. Overall, results indicate that passivation deposition deleterious effects loadings, structures, activities.
cheric.org
osti.gov参考文章(33)
B.L. Mojet, M.J. Kappers, J.T. Miller, D.C. Koningsberger, Metal-Support Interactions in Supported Platinum Catalysts: Zeolites and Amorphous Supports. Studies in Surface Science and Catalysis. ,vol. 101, pp. 1165- 1174 ,(1996) , 10.1016/S0167-2991(96)80328-4
A. Griboval-Constant, J.-M. Giraudon, I. Twagishema, G. Leclercq, M.E. Rivas, J. Alvarez, M.J. Pérez-Zurita, M.R. Goldwasser, Characterization of new Co and Ru on α-WC catalysts for Fischer-Tropsch reaction Journal of Molecular Catalysis A: Chemical. ,vol. 259, pp. 187- 196 ,(2006) , 10.1016/J.MOLCATA.2006.06.015
Kamyar Keyvanloo, William C. Hecker, Brian F. Woodfield, Calvin H. Bartholomew, Highly active and stable supported iron Fischer–Tropsch catalysts: Effects of support properties and SiO2 stabilizer on catalyst performance Journal of Catalysis. ,vol. 319, pp. 220- 231 ,(2014) , 10.1016/J.JCAT.2014.08.015
Adam C. Lausche, Joshua A. Schaidle, Levi T. Thompson, Understanding the effects of sulfur on Mo2C and Pt/Mo2C catalysts: Methanol steam reforming Applied Catalysis A-general. ,vol. 401, pp. 29- 36 ,(2011) , 10.1016/J.APCATA.2011.04.037
Heng Shou, Robert J. Davis, Reactivity and in situ X-ray Absorption Spectroscopy of Rb-promoted Mo2C/MgO Catalysts for Higher Alcohol Synthesis Journal of Catalysis. ,vol. 282, pp. 83- 93 ,(2011) , 10.1016/J.JCAT.2011.05.028
Gaowei Wang, Joshua A. Schaidle, Michael B. Katz, Yongdan Li, Xiaoqing Pan, Levi T. Thompson, Alumina supported Pt–Mo2C catalysts for the water–gas shift reaction Journal of Catalysis. ,vol. 304, pp. 92- 99 ,(2013) , 10.1016/J.JCAT.2013.04.007
Joshua A. Schaidle, Neil M. Schweitzer, Olabode T. Ajenifujah, Levi T. Thompson, On the preparation of molybdenum carbide-supported metal catalysts Journal of Catalysis. ,vol. 289, pp. 210- 217 ,(2012) , 10.1016/J.JCAT.2012.02.012
Minglin Xiang, Debao Li, Haicheng Xiao, Jianli Zhang, Wenhuai Li, Bing Zhong, Yuhan Sun, K/Ni/β-Mo2C : A highly active and selective catalyst for higher alcohols synthesis from CO hydrogenation Catalysis Today. ,vol. 131, pp. 489- 495 ,(2008) , 10.1016/J.CATTOD.2007.10.083
J. P. Brunelle, Preparation of catalysts by metallic complex adsorption on mineral oxides Pure and Applied Chemistry. ,vol. 50, pp. 1211- 1229 ,(1978) , 10.1351/PAC197850091211
Ling Jiao, John R. Regalbuto, The synthesis of highly dispersed noble and base metals on silica via strong electrostatic adsorption: I. Amorphous silica Journal of Catalysis. ,vol. 260, pp. 329- 341 ,(2008) , 10.1016/J.JCAT.2008.09.022