文献类型：期刊文献

英文题名：Nickel oxide regulating surface oxygen to promote formaldehyde oxidation on manganese oxide catalysts

作者：Zhao, Hailin[1];Tang, Jie[2];Li, Zengyuan[1];Yang, Jie[1];Liu, Hao[1];Wang, Li[1];Cui, Yao[2];Zhan, Wangcheng[1];Guo, Yanglong[1];Guo, Yun[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[2]Shanghai HuaYi New Mat Co Ltd, Technol Dept, 139 Pugong Rd, Shanghai 201507, Peoples R China

年份：2021

卷号：11

期号：21

起止页码：7110

外文期刊名：CATALYSIS SCIENCE & TECHNOLOGY

收录：;EI(收录号：20214611164733);WOS:【SCI-EXPANDED(收录号:WOS:000697789800001)】；

基金：This project was supported financially by the National Key Research and Development Program of China (2016YFC0204300), the NSFC of China (21571061, 21976057 and 21922602), Shanghai Science and Technology Innovation Plan (19DZ1208000), the fund of the State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals (SKL-SPM-202018) and Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Formaldehyde - Oxygen - Binary alloys - Catalysts - Precipitation (chemical) - Catalytic oxidation - Magnetic semiconductors - Manganese oxide

摘要：Catalytic oxidation is the most effective method to eliminate in-door formaldehyde, and Mn-based catalysts with low cost and high activity have drawn great attention for this reaction. Herein, p-type semiconductor NiO doped MnOx catalysts were prepared by an environmentally friendly oxalate co-precipitation method. The doped Ni species entered the lattice of MnOx to form amorphous Ni-Mn composite oxide/NiO and increased the ratio of surface Mn4+ and total amount of surface active oxygen simultaneously with the increase of NiO content in the form of a volcano curve, which directly correlated to the abilities for adsorption and oxidation of formaldehyde. Among them, 0.2NiO-MnOx (Ni/(Ni + Mn) = 0.2) showed the highest activity, 300 ppm of formaldehyde can be completely eliminated at 98 degrees C in a 2.5 vol% H2O-containing atmosphere, and the corresponding specific reaction rate was about 2.9 times higher than that of pure MnOx. Meanwhile, the enhanced migration of oxygen species over NiO-MnOx catalysts also promoted the replenishment of surface active oxygen that was consumed in the reaction process, which kept the activity of 0.2NiO-MnOx stable during the continuous reaction cycles and 26 h long-term stability test. Our study showed that utilizing NiO to regulate the reactivity and amount of surface oxygen species was an efficient way to improve the intrinsic catalytic performance of MnOx.