The action of Pt in bimetallic Au–Pt/CeO2 catalyst for water–gas shift reaction

Autor:	Mingshan Jin, Yang Li, Qiangqiang Yu, Zhanghuai Suo, Wei Chen
Rok vydání:	2010
Předmět:	Transition metal chemistry Catalyst support Inorganic chemistry chemistry.chemical_element Water gas General Chemistry Platinum Heterogeneous catalysis Bimetallic strip Catalysis Water-gas shift reaction
Zdroj:	Catalysis Today. 158:324-328
ISSN:	0920-5861
DOI:	10.1016/j.cattod.2010.04.005
Popis:	Bimetallic Au–M (M = Ni, Cu, Ag, Pt, and Pd) catalysts supported on CeO 2 were prepared by step-by-step impregnation method for water–gas shift reaction. Among them Au–Pt/CeO 2 catalyst shows the highest activity with 78% conversion of CO at 250 °C. The action of platinum in Au–Pt/CeO 2 catalyst was investigated by means of X-ray diffraction, hydrogen temperature-programmed reduction, UV–vis diffuse reflection spectroscopy, and X-ray photoelectron spectroscopy. It is found that the introduction of platinum in Au–Pt/CeO 2 catalyst is responsible for the formation of partly oxidized gold species probably due to the interatomic charge transfer from Au 5d to Pt 5d band. The presence of both gold and platinum is beneficial to the reduction of ceria to Ce 3+ species as well as the creation of oxygen vacancies and makes the average size of ceria smaller.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::101eb6d9c38d5ffea729561697e677b7 https://doi.org/10.1016/j.cattod.2010.04.005 Zobrazit plný text záznamu Full Text from ScienceDirect