燃料化学学报2017，Vol.45Issue(9)：1137-1145,9.
Y修饰CuO/ZrO2催化剂高效催化水煤气变换反应制氢
Highly active Y-promoted CuO/ZrO2 catalysts for the production of hydrogen through water-gas shift reaction
摘要
Abstract
ZrO2 doped with various concentrations of yttrium (0-5％) was prepared by a hydrothermal homogeneous co-precipitation method and CuO was then deposited on ZrO2 by a deposition-precipitation method to get the yttrium promoted CuO/ZrO2 catalyst;its performance in the water-gas shift reaction for producing hydrogen was then investigated.The results indicate that the catalytic activity of CuO/ZrO2 can be effectively improved by yttrium modification;over the yttrium promoted CuO/ZrO2 catalyst with an yttrium concentration of 2％,the CO conversion reaches 91.4％ at 270 ℃,much higher than those over the conventional CuO/ZnO and CuO/CeO2 catalysts.The XRD,N2-physisorption,N2O titration,SEM and CO-TPR characterization results reveal that y3+ is successfully incorporated into the lattice of ZrO2,which has a great influence on the structure and reducibility of the CuO/ZrO2 catalysts,y3+ doping into ZrO2 introduces oxygen vacancies,improving the dispersion of CuO and increasing the proportion of catalytically active Cu-[O]-Zr species.In addition,the introduction of yttrium improves the monodispersity and modifies the texture properties of the CuO/ZrO2 catalysts.As a result,the superior activity of 2％ yttrium promoted CuO/ZrO2 catalyst is probably attributed to the abundance of Cu-[O]-Zr species,high reducibility of Cu-[O]-Zr species and surface hydroxyl groups,high monodispersity and proper textural properties.关键词
CuO/ZrO2催化剂/水煤气变换反应/Y助剂/氧空位/表面羟基Key words
CuO/ZrO2 catalyst/water-gas shift reaction/yttrium promoter/oxygen vacancy/surface hydroxyl groups分类
化学化工引用本文复制引用
张燕杰,陈崇启,詹瑛瑛,林棋,娄本勇,郑国才,郑起..Y修饰CuO/ZrO2催化剂高效催化水煤气变换反应制氢[J].燃料化学学报,2017,45(9):1137-1145,9.基金项目
The project was supported by the National Natural Science Foundation of China (21503105),Natural Science Foundation of Fujian Province (2017J05025,2017J01584),JK Project of the Education Department of Fujian Province(JK2015038),JA Project of the Education Department of Fujian Province (JA15419) and the plan of college outstanding young research talents in Fujian Province(2016).国家自然科学基金(21503105),福建省自然科学基金(2017J05025,2017J01584),福建省教育厅JK类项目(JK2015038),福建省中青年教师教育科研项目(JA15419)和福建省高校杰出青年科研人才培育计划(2016)资助 （21503105）
