脱氢
催化作用
丙烷
串联
化学
联轴节(管道)
燃烧
材料科学
分析化学(期刊)
无机化学
物理化学
有机化学
冶金
复合材料
作者
Huan Yan,Kun He,Izabela A. Samek,Dian Jing,Macy G. Nanda,Peter C. Stair,Justin M. Notestein
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2021-03-18
卷期号:371 (6535): 1257-1260
被引量:181
标识
DOI:10.1126/science.abd4441
摘要
Tandem catalysis couples multiple reactions and promises to improve chemical processing, but precise spatiotemporal control over reactive intermediates remains elusive. We used atomic layer deposition to grow In2O3 over Pt/Al2O3, and this nanostructure kinetically couples the domains through surface hydrogen atom transfer, resulting in propane dehydrogenation (PDH) to propylene by platinum, then selective hydrogen combustion by In2O3, without excessive hydrocarbon combustion. Other nanostructures, including platinum on In2O3 or platinum mixed with In2O3, favor propane combustion because they cannot organize the reactions sequentially. The net effect is rapid and stable oxidative dehydrogenation of propane at high per-pass yields exceeding the PDH equilibrium. Tandem catalysis using this nanoscale overcoating geometry is validated as an opportunity for highly selective catalytic performance in a grand challenge reaction.
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