Ni2O3–Au+ hybrid active sites on NiOx@Au ensembles for low-temperature gas-phase oxidation of alcohols
Ni2O3–Au+ hybrid active sites on NiOx@Au ensembles for low-temperature gas-phase oxidation of alcohols
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DOI：
10.1039/c2cy20579c
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发表时间：
2013-01
影响因子：
5
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中科院分区：
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NiOx@Au（即部分覆盖有非常小的NiOx片段的20-30 nm金颗粒）的一个有趣的整体被清楚地鉴定为对于醇的低温气相氧化具有高活性。在这样的活性NiOx@Au系综上，限定了大量的Ni 2 O3-Au+混合活性位点，更接近于鉴定低温活性。通过它们的性质，Ni 2 O3试样不仅促进Au+离子的形成并稳定它们，而且还充当氧供应者，将氧物种转移到Au+位点上以与醇反应。
An interesting ensemble of NiOx@Au (i.e. 20–30 nm gold particles partially covered with very small NiOx segments) were clearly identified to be highly active for the low-temperature gas-phase oxidation of alcohols. On such active NiOx@Au ensembles, large amounts of Ni2O3–Au+ hybrid active sites were defined, taking a step closer to identifying the low-temperature activity. By their nature, Ni2O3 specimens not only promote the formation of Au+ ions and stabilize them but also act as an oxygen supplier to transfer oxygen species onto the Au+ sites to react with alcohol.