Hydrothermal Synthesis of a Novel Double-Sided Nanobrush Co3O4 Catalyst and Its Catalytic Performance for Benzene Oxidation
Hydrothermal Synthesis of a Novel Double-Sided Nanobrush Co3O4 Catalyst and Its Catalytic Performance for Benzene Oxidation
复制标题
新型双面纳米刷Co3O4催化剂的水热合成及其苯氧化催化性能
DOI：
10.1002/cctc.201801539
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发表时间：
2019
期刊：
影响因子：
4.5
通讯作者：
Ge Maofa
中科院分区：
文献类型：
--
作者：
Ma Xiuyun;Yu Xiaolin;Yang Xueqin;Lin Mengya;Ge Maofa
首次用水热法制备了双面纳米棒Co3O4(Co3O4−B)催化剂，并通过调节水/乙醇比合成了Co3O4棒状(Co3O4−R)、Co3O4六方片(Co3O4−H)和Co3O4双面向日葵圆盘(Co3O4−D)。在所有制备的催化剂中，Co3O4−B催化剂对苯氧化表现出最好的催化活性。这种优异的催化性能可以归因于催化剂表面丰富的Co3+物种、良好的低温还原性能和大量的晶格缺陷以及大量的活性氧物种，这是双面纳米棒独特结构的结果。稳定性和耐水性试验表明，Co3O4−B催化剂对苯的燃烧表现出良好的稳定性，水蒸气引起的失活也是可逆的。结果表明，催化剂独特的结构对其催化氧化性能起着至关重要的作用。
A double‐sided nanobrush Co3O4(Co3O4−B) catalyst was successfully prepared by a hydrothermal method for the first time, and Co3O4rods (Co3O4−R), Co3O4hexagonal plates (Co3O4−H) and Co3O4double‐sided helianthus discs (Co3O4−D) were also synthesized through tuning the water/ethanol ratio. Among all of the as‐prepared catalysts, the Co3O4−B catalyst exhibited the best catalytic activity for benzene oxidation. The excellent catalytic performance could be attributed to the surface abundance Co3+species, good low‐temperature reducibility and high number of lattice defects with substantial active oxygen species, which resulted from the unique structure of the double‐sided nanobrush. The stability and water tolerance tests demonstrated that the Co3O4−B catalyst displays excellent stability for benzene combustion, and the deactivation caused by water vapor is also reversible. It is concluded that the unique structure of the catalysts plays a crucial role in determining its catalytic oxidation performance.