燃料化学学报（中英文）2023，Vol.51Issue(12)：1791-1804,14.DOI:10.1016/S1872-5813(23)60363-9
Pt-MOx/CeO2水相重整催化剂上氧化物助剂对于水气变换反应的促进作用研究
Investigation of the promotion effect of metal oxides on the water-gas shift reaction activity over Pt-MOx/CeO2 catalysts for aqueous phase reforming
摘要
Abstract
Aqueous phase reforming (APR) of methanol is a potential pathway for the effective hydrogen production under relatively mild conditions. The Pt/CeO2 and a series of Pt-MOx/CeO2 (M = Fe, Cr, Mg, Mn) catalysts were prepared by sequential impregnation method and their APR reaction performances were studied. The catalyst properties including valence state of the promoters, the amount of oxygen vacancies, the metal distributions, the adsorption properties of CO and the acidity/basicity of catalysts were characterized and analyzed by XPS, XRD, TEM, CO-TPD, NH3-TPD, CO2-TPD, etc. It was found that the addition of MOx weakened the Pt-CeO2 interaction and promoted the generation of Ptδ + species with lower valence state, which contribute to the C-H bond cleavage and facilitate methanol conversion. The highest hydrogen production (164.78 mmol) and relatively low CO and CH4 selectivities were obtained over the Pt-MgO/CeO2, while the highest CH4 selectivity was obtained over the Pt-CrOx/CeO2 (2.21％). Over the Pt/CeO2 and Pt-MOx/CeO2 (M = Fe, Cr, Mg, Mn) catalysts, CO2/CH4 ratio correlated well with the catalyst basicity, indicating that the basicity promotes the dissociation adsorption of H2O as well as the water-gas shift (WGS) reaction activity and decreases the methanation activity.关键词
WGS反应/碱度/液相重整/金属-载体相互作用Key words
WGS reaction/basicity/aqueous phase reforming/metal-support interaction分类
能源科技引用本文复制引用
张伟杰,田志鹏,黄嘉豪,王珺瑶,罗向龙,王超,舒日洋,刘建平,陈颖..Pt-MOx/CeO2水相重整催化剂上氧化物助剂对于水气变换反应的促进作用研究[J].燃料化学学报（中英文）,2023,51(12):1791-1804,14.基金项目
The project was supported by the Natural Science Foundation of China(52106234),Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development(E239kf1301)and Science and Technology Planning Project of Guangdong Province(2021A0505030065). （52106234）
