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Enhanced catalytic performance of Cr-inserted hydrotalcites in the liquid oxidation of styrene

机译:增强苯乙烯液体氧化中Cr插入水滑石的催化性能

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Chromium(III) ions were inserted in magnesium hydroxide layers via co-precipitation route. In the low chromium content sample, Cr(III) ions are present mostly at octahedral sites of metal hydroxide layers, while some Cr(VI) species formed on the external surface of the high-chromium content catalyst. The Cr-doped metal hydroxide layer ions play as active sites for the oxidation of styrene with H2O2 at a low temperature. The insertion of chromium(III) in the brucite-like sheets enhanced catalytic stability of catalysts in the oxidation of styrene. The Cr-doped hydrotaicites showed a good activity (50-60%), and high selectivity to benzaldehyde (80-85%) at room temperature. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译:通过共沉淀的途径将铬(III)离子插入氢氧化镁层中。 在低铬含量样品中,Cr(III)离子主要存在于金属氢氧化物层的八面体位点,而在高铬含量催化剂的外表面上形成的一些Cr(VI)物种。 Cr掺杂的金属氢氧化物层离子作为活性位点,用于在低温下用H 2 O 2氧化苯乙烯。 在苯乙烯的氧化氧化中,铬(III)在Brucite的片材中加入催化剂的催化稳定性。 Cr掺杂的水辐射晶体显示出良好的活性(50-60%),对室温下的苯甲醛(80-85%)具有高选择性。 (c)2019年韩国工程化学学会。 elsevier b.v出版。保留所有权利。

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