ZnO纳米线负载Pd1单原子催化剂催化若干反应性能的考察

doi:10.1016/S1872-2067(17)62899-7

催化学报 ›› 2017, Vol. 38 ›› Issue (9): 1549-1557.DOI: 10.1016/S1872-2067(17)62899-7

ZnO纳米线负载Pd₁单原子催化剂催化若干反应性能的考察

Jia Xu^a, Yian Song^a, Honglu Wu^a,b, Jingyue Liu^a

a 亚利桑那州立大学物理系, 亚利桑那州坦佩 85287, 美国;
b 北京交通大学光电子技术研究所, 北京 100044, 中国

收稿日期:2017-05-23 修回日期:2017-08-17 出版日期:2017-09-18 发布日期:2017-09-06
通讯作者: Jingyue Liu

Probing the catalytic behavior of ZnO nanowire supported Pd₁ single-atom catalyst for selected reactions

Jia Xu^a, Yian Song^a, Honglu Wu^a,b, Jingyue Liu^a

a Department of Physics, Arizona State University, Tempe, Arizona 85287, United States;
b Institue of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China

Received:2017-05-23 Revised:2017-08-17 Online:2017-09-18 Published:2017-09-06
Contact: 10.1016/S1872-2067(17)62899-7

摘要/Abstract

摘要：

将孤立的Pd原子分散到ZnO纳米线（NWs）上作为单原子催化剂（SACs），并考察了它们在若干反应中的催化性能.Pd₁/ZnO SAC对甲醇蒸汽重整制氢反应表现出高的活性、稳定性和CO₂选择性.该催化剂体系对CO和H₂的氧化也具有高活性，但在富氢物料中CO优先氧化反应中的催化剂性能较差，这主要是由于在ZnO负载的Pd₁原子上H₂氧化的强竞争反应所致.常压下在Pd₁/ZnO SAC上就可发生逆水汽变换反应.该系列催化反应测试结果清楚地表明，选择合适金属与载体对开发分子催化转化用单原子催化剂至关重要.

关键词: 单原子催化剂, 钯, 氧化锌纳米线, 甲醇蒸汽重整, 一氧化碳氧化, 加氢

Abstract:

We have dispersed individual Pd atoms onto ZnO nanowires (NWs) as single-atom catalysts (SACs) and evaluated their catalytic performance for several selected catalytic reactions. The Pd₁/ZnO SAC is highly active, stable, and selective towards CO₂ for steam reforming of methanol to produce hy-drogen. This catalyst system is active for oxidation of CO and H₂ but performs poorly for preferential oxidation of CO in hydrogen-rich stream primarily due to the strong competitive oxidation of H₂ on ZnO supported Pd₁ atoms. At ambient pressure, reverse water-gas-shift reaction occurs on the Pd₁/ZnO SAC. This series of tests of catalytic reactions clearly demonstrate the importance of se-lecting the appropriate metal and support to develop SACs for catalytic transformation of molecules.

Key words: Single-atom catalyst, Palladium, Znic oxide nanowire, Steam reforming of methanol, Carbon monoxide oxidation, Hydrogenation

Jia Xu, Yian Song, Honglu Wu, Jingyue Liu. ZnO纳米线负载Pd₁单原子催化剂催化若干反应性能的考察[J]. 催化学报, 2017, 38(9): 1549-1557.

Jia Xu, Yian Song, Honglu Wu, Jingyue Liu. Probing the catalytic behavior of ZnO nanowire supported Pd₁ single-atom catalyst for selected reactions[J]. Chinese Journal of Catalysis, 2017, 38(9): 1549-1557.

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ZnO纳米线负载Pd₁单原子催化剂催化若干反应性能的考察

Probing the catalytic behavior of ZnO nanowire supported Pd₁ single-atom catalyst for selected reactions

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