Three-dimensionally macroporous MnZrOx catalysts for propane combustion: Synergistic structure and doping effects on physicochemical and catalytic properties

Kai Zeng; Xingyun Li; Chao Wang; Zhong Wang; Peng Guo; Jun Yu; Chuanhui Zhang; Xiu Song Zhao

doi:10.1016/j.jcis.2020.03.093

Three-dimensionally macroporous MnZrO_x catalysts for propane combustion: Synergistic structure and doping effects on physicochemical and catalytic properties

J Colloid Interface Sci. 2020 Jul 15:572:281-296. doi: 10.1016/j.jcis.2020.03.093. Epub 2020 Mar 28.

Authors

Kai Zeng¹, Xingyun Li¹, Chao Wang², Zhong Wang³, Peng Guo⁴, Jun Yu⁵, Chuanhui Zhang⁶, Xiu Song Zhao⁷

Affiliations

¹ Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China.
² College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
³ Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China.
⁴ State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, PR China.
⁵ School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China.
⁶ Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China; Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China. Electronic address: zhangch@qdu.edu.cn.
⁷ Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, PR China; School of Chemical Engineering, The University of Queensland, Brisbane, QLD 4072, Australia.

PMID: 32251907
DOI: 10.1016/j.jcis.2020.03.093

Abstract

Three-dimensionally macroporous (3DM) MnZrO_x catalysts were fabricated to reveal the structure and Zr-doping effects on both physicochemical properties and propane combustion behaviors. The increasing addition of zirconium is favorable for the formation of 3DM structure and amorphous Mn-Zr solid solution, leading to tunable physicochemical properties. The significant activity improvement after zirconium addition was originally attributable to the superior redox ability, higher oxygen mobility and more abundant oxygen vacancy. The excellent catalytic activity, cycling stability and water resistant ability over 3DM Mn_0.6Zr_0.4O_x make it a promising material for hydrocarbons elimination. The comparative TPSR, in situ DRIFTs and kinetics study over 3DM and bulk catalysts emphasize the advantageous function of 3DM architecture on promoting propane adsorption, oxidation and lattice oxygen mobility.

Keywords: Oxygen vacancy; Propane adsorption; Propane combustion; Redox ability; Three-dimensionally macroporous structure.