Acid-Resistant Catalysis without Use of Noble Metals: Carbon Nitride with Underlying Nickel
Acid-Resistant Catalysis without Use of Noble Metals: Carbon Nitride with Underlying Nickel
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不使用贵金属的耐酸催化：含镍的氮化碳
DOI：
10.1021/cs500523k
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发表时间：
2014-08-01
期刊：
影响因子：
12.9
通讯作者：
Ding, Weiping
中科院分区：
文献类型：
--
作者：
Fu, Teng;Wang, Meng;Ding, Weiping
合成了一种在强酸性条件下不含贵金属的纳米复合材料，并对其进行了深入的研究。这种特殊设计的催化剂具有独特的结构，由氮化碳(CN)和底层镍组成，其中镍为CN提供了新的氢吸附和活化活性中心，而它本身在物理上与反应环境隔绝，并防止中毒或损失。在没有镍的帮助下，CN对加氢反应是惰性的。该催化剂在强酸性条件下对硝基化合物的加氢反应表现出良好的性能，包括在1.5M的H_2SO_4中一步加氢生成对氨基苯酚，而以往的研究表明，反应体系中的酸仅限于贵金属。进一步的表征表明，催化剂中的镍处于缺电子状态，这是因为它的部分电子已被提供给...
A nanocomposite able to function as a hydrogenation catalyst under strongly acidic conditions without the presence of noble metals is synthesized and thoroughly studied. This specially designed catalyst possesses a unique structure composed of carbon nitride (CN) with underlying nickel, in which the nickel endows the CN with new active sites for hydrogen adsorption and activation while it itself is physically isolated from the reactive environment and protected from poisoning or loss. The CN is inert for hydrogenation without the help of nickel. The catalyst shows good performance for hydrogenation of nitro compounds under strong acidic conditions, including the one-step hydrogenation of nitrobenzene in 1.5 M H2SO4 to produce p-amoniophenol, for which the acid in the reaction system has restricted the catalyst only to noble metals in previous studies. Further characterization has demonstrated that the nickel in the catalyst is in an electron-deficient state because some of its electron has been donated to...