负载方式对Ag/Co<sub>3</sub>O<sub>4</sub>催化剂催化氧化甲醛活性的影响

摘要

采用硬模板法原位负载(insitu)和后浸渍(post)法制备了介孔Ag/Co₃O₄和不负载的介孔Co₃O₄催化剂,考察了它们对甲醛的催化氧化活性,其中后浸渍法负载的催化剂(Ag/Co₃O₄-post)展示了最优的活性。对各催化剂样品的表征发现,Ag/Co₃O₄-post在负载Ag的制备过程中介孔结构塌陷,但同时其还原能力增强,并且暴露出最多的表面Co³⁺和缺陷氧,进而使其具有最强的催化氧化甲醛的活性。

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	张江浩
	王亚飞
	张长斌
	贺泓

关键词：负载型Ag/Co₃O₄；原位负载；后浸渍；介孔结构；催化氧化甲醛

Abstract：

The mesoporous materials Ag/Co₃O₄-insitu, Ag/Co₃O₄-post and pure Co₃O₄ were prepared by different synthesis methods and then their catalytic activity for formaldehyde oxidation were tested. The catalyst prepared by post-impregnation method (Ag/Co₃O₄-post) showed the best activity. The characterization reveals that the mesoporous structure of Ag/Co₃O₄-post was destroyed during the Ag loading process, enhancing its reducibility and exposing more Co³⁺ and O defects, which then strengthen its catalytic activity.

Keywords： Ag/Co₃O₄； insitu-synthesis； post-impregnation； mesoporous structure； catalytic oxidation of formaldehyde

Received 2015-03-14;

Corresponding Authors: 张长斌,E-mail:cbzhang@rcees.ac.cn。 Email: cbzhang@rcees.ac.cn

About author: 张江浩(1990-),男,硕士研究生,主要从事非贵金属催化剂催化氧化甲醛的研究。

引用本文:

张江浩, 王亚飞, 张长斌, 贺泓.负载方式对Ag/Co₃O₄催化剂催化氧化甲醛活性的影响[J]. 化学工业与工程, 2015,32(3): 68-73

Zhang Jianghao, Wang Yafei, Zhang Changbin, He Hong.Effect of the Loading Process to the Catalytic Activity of Ag/Co₃O₄ for Formaldehyde Complete Oxidation[J]. Chemcial Industry and Engineering, 2015,32(3): 68-73

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