Effects of the Partial Replacement of La in La2-xMxCuO4 Perovskites on Catalysis of the Water-Gas Shift Reaction

能源化学(英文) ›› 2010, Vol. 19 ›› Issue (6): 0-0.

• Articles •

Effects of the Partial Replacement of La in La2-xMxCuO4 Perovskites on Catalysis of the Water-Gas Shift Reaction

ElisabeteMoreira Assaf¹,Maluf²

1. Físico-Química,Universidade de São Paulo
2. IQSC/USP

收稿日期:2010-03-05 修回日期:2010-04-26 出版日期:2010-11-30 发布日期:2010-11-25
通讯作者: ElisabeteMoreira Assaf

Effects of the Partial Replacement of La in La2-xMxCuO4 Perovskites on Catalysis of the Water-Gas Shift Reaction

Received:2010-03-05 Revised:2010-04-26 Online:2010-11-30 Published:2010-11-25

摘要/Abstract

摘要：

关键词: perovskites , shift reaction , lanthanum , copper , calcium , cerium , strontium , perovskites, shift reaction, lanthanum, copper, calcium, cerium, strontium

Abstract: The performance of La2-xMxCuO4 perovskites (where M = Ce, Ca or Sr) as catalysts for the water杇as shift reaction was investigated at 2900C and 3600C. The catalysts were characterized by EDS, XRD, BET surface area, XPS and XANES. The XRD results showed that all the perovskites exhibited a single phase (the presence of perovskite structure), suggesting the incorporation of metals in the perovskite structure. The XPS and XANES results showed the presence of Cu2+ at the surface. The perovskites that exhibited the best catalytic performance were La2-xCexCuO4 perovskites, with CO conversion of 85-90%. Besides these perovskites have higher surface areas and larger amounts of Cu at the surface, the Ce has a higher filled energy level than other metals, increasing the energy of the valence band of the Ce and providing more electrons for reaction. Also, the La1.80Ca0.20CuO4 perovskite had a good catalytic performance.

ElisabeteMoreira Assaf Maluf. Effects of the Partial Replacement of La in La2-xMxCuO4 Perovskites on Catalysis of the Water-Gas Shift Reaction [J]. 能源化学(英文), 2010, 19(6): 0-0.

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Effects of the Partial Replacement of La in La2-xMxCuO4 Perovskites on Catalysis of the Water-Gas Shift Reaction

Effects of the Partial Replacement of La in La2-xMxCuO4 Perovskites on Catalysis of the Water-Gas Shift Reaction

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