Mn1-yNiyOx的制备及其催化燃烧甲苯性能的研究

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Abstract Series of dual meta oxides Mn_1-yNi_yO_x (y=0.1~0.5) catalysts were prepared by hydrothermal co-precipitation to investigate the effect of nickel doping on manganese-based oxides for toluene catalytic combustion reaction. Manganese to nickel ratio was optimized and the corresponding thermal stability as well as durability performances were also evaluated. The physical structure and redox performance of the obtained catalysts were characterized through XRD, N₂ adsorption/desorption, SEM, H₂-TPR and XPS. Results revealed that strong interaction exists between Mn and Ni, which results in the generation of more high valent Mn⁴⁺ and surface adsorbed oxygen species, thus providing more reactive sites and enhancing the catalytic oxidation performance. Mn_0.8Ni_0.2O_x proposed the best toluene removal efficiency in the catalytic combustion, as well as excellent thermal stability and durability. Compared with MnO_x, its T₅₀ and T₉₀ were reduced by 12 and 11℃, respectively, demonstrating complete toluene elimination at 238℃, and the carbon balance was about 99% without secondary pollution. This work provides promising materials with practical potentials for the catalytic combustion of volatile organic compounds (VOCs) as well as new insights regarding catalyst design principles.

Key words： toluene Mn-Ni catalysts catalytic oxidation thermal stability

Received: 18 September 2021

PACS:

X701.7

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	Articles by authors
	ZHOU Yuan-yuan
	LIU Han
	DENG Lin
	WU Gong-de
	WAN Jie
	WANG Xiao-li
	HU Chun-zheng
	YU Xian-kun
	YANG Xiao-jun

Cite this article:

ZHOU Yuan-yuan,LIU Han,DENG Lin等. Synthesis of Mn₁_-yNi_yO_x catalyst and its high efficient performance for toluene catalytic combustion[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(4): 1601-1609.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I4/1601

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