Synergically regulated silver species and surface oxygen on manganese oxide for promoted activity of formaldehyde oxidation

作     者：Shuo Hu Jianghao Zhang Xueyan Chen Xiaoxiao Qin Jinshui Yao Changbin Zhang Shuo Hu;Jianghao Zhang;Xueyan Chen;Xiaoxiao Qin;Jinshui Yao;Changbin Zhang

作者机构：School of Materials Science&EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China State Key Joint Laboratory of Environment Simulation and Pollution ControlResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2024年第138卷第4期

页      面：709-718页

核心收录：

学科分类：1002[医学-临床医学] 07[理学] 1001[医学-基础医学(可授医学、理学学位)] 08[工学] 0806[工学-冶金工程] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.22025604,22106171,21936005,and 21976196) the Jinan“20 Universities”Funding Project(No.2020GXRC027)。 

主　　题：HCHO oxidation Ag-MnO_(x)-based catalyst Activation condition Synergic regulation Surface oxygen Oxidized Ag 

摘      要：Formaldehyde(HCHO)is a common indoor pollutant that is detrimental to human health.Its efficient removal has become an urgent demand to reduce the public health risk.In this work,Ag-MnO_(x)-based catalysts were prepared and activated under different atmosphere(i.e.,air,hydrogen(H_(2))and carbon monoxide(CO))for efficient oxidation of HCHO.The catalyst activated with CO(Ag/Mn-CO)displayed the highest activity among the tested samples with 90% conversion at 100℃ under a gas space velocity of 75,000 mL/(g_(cat)·hr).Complementary characterizations demonstrate that CO reduction treatment resulted in synergically regulated content of surface oxygen on support to adsorb/activate HCHO and size of Ag particle to dissociate oxygen to oxidize the adsorbed HCHO.In contrast,other catalysts lack for either abundant surface oxygen species or metallic silver with the appropriate particle size,so that the integrate activity is limited by one specific reaction step.This study contributes to elucidating the mechanisms regulating the oxidation activity of Ag-based catalysts.