Synergistic effect of cobalt and niobium in Co_(3)-Nb-O_(x)on performance of selective catalytic reduction of NO with NH_(3)

作     者：Bo-Lin Zhang Li-Feng Deng Bo Liu Chun-Yun Luo Michael Liebau Shen-Gen Zhang Roger Glaser Bo-Lin Zhang;Li-Feng Deng;Bo Liu;Chun-Yun Luo;Michael Liebau;Shen-Gen Zhang;Roger Gl(a)iser

作者机构：Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Shunde Graduate SchoolUniversity of Science and Technology BeijingFoshan 528399China Jiangsu Longkingcotech Co.Ltd.Yancheng 224000China Institute of Chemical TechnologyUniversita¨t LeipzigLeipzig 04103Germany e-mail:roger.glaeser 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第1期

页      面：166-178页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was financially supported by the National Key R&D Projects(No.2019YFC1907101) the National Natural Science Foundation of China(No.U2002212) the State Key Laboratory for Advanced Metals and Materials(No.2019Z-05) the Fundamental Research Funds for the Central Universities(Nos.FRFIDRY-20-005 and FRF-TP-20-097A1Z) the Postdoctor Research Foundation of Shunde Graduate School of University of Science and Technology Beijing(No.2020BH012) 

主　　题：Co-Nb Selective catalytic reduction Lowtemperature Acid property Redox behavior 

摘      要：Combining the redox properties of Co and the acid properties of Nb in a Co_(3)-Nb-O_(x)catalyst is shown to provide superior performance in the selective catalytic reduction of NO with NH_(3)(NH_(3)-SCR).Co_(3)O_(4)shows average activity,however,it exhibits a poor N_(2)***_(2)O_(5)is not active for NH_(3)-***,the mixed Co_(3)-Nb-O_(x) catalyst shows higher NO conversion and N_(2)selectivity than the single Co_(3)O_(4)and Nb_(2)O_(5)catalysts at 100–300℃.The results of temperature programmed reduction by H_(2)and X-ray photoelectron(XP)spectra indicate that the addition of Nb changes the chemical states of Co and decreases the concentration of Co^(3+) and Oa,adjusting the activity for catalytic oxidation to a moderate *** suppresses the formation of undesired N_(2)O from the over-oxidation of NH_(3).Incorporation of Co and Nb into one solid synergistically couples their redox behavior and surface acidity,ensuring the high catalytic activity and N2 selectivity in NH3-SCR.