催化作用
化学
纳米棒
偶氮
氧化还原
转移加氢
硝基
基础(拓扑)
氧气
无机化学
组合化学
有机化学
材料科学
钌
纳米技术
数学分析
烷基
数学
作者
Ziliang Yuan,Liang Huang,Yuanshuai Liu,Yong Sun,Guanghui Wang,Xun Li,Johannes A. Lercher,Zehui Zhang
标识
DOI:10.1002/anie.202317339
摘要
Abstract CeO 2 nanorod based catalysts for the base‐free synthesis of azoxy‐aromatics via transfer hydrogenation of nitroarenes with ethanol as hydrogen donor have been synthesized and investigated. The oxygen vacancies (O v ) and base sites are critical for their excellent catalytic properties. The O v , i.e., undercoordinated Ce cations, serve as the sites to activate ethanol and nitroarenes by lowering the energy barrier to transfer hydrogen from α−C sp3 −H in ethanol to the nitro group coupling it to the redox reactions between Ce 3+ and Ce 4+ . At the same time, the base sites catalyze the condensation step to selectively produce azoxy‐aromatics. The catalytic route opens a much improved way to use non‐noble metal oxides without additives for the selective functional group reduction and coupling reactions.
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