Fabrication of highly dispersed Pd-Mn3O4 catalyst for efficient catalytic propane total oxidation

Chao Feng; Yunxia Wang; Chong Chen; Xueqing Fu; Yuan Pan; Hongchuan Xin; Zhong Wang; Yukun Lu; Xuebing Li; Runduo Zhang; Yunqi Liu

doi:10.1016/j.jcis.2023.07.076

Fabrication of highly dispersed Pd-Mn₃O₄ catalyst for efficient catalytic propane total oxidation

J Colloid Interface Sci. 2023 Nov 15;650(Pt B):1415-1423. doi: 10.1016/j.jcis.2023.07.076. Epub 2023 Jul 16.

Authors

Chao Feng¹, Yunxia Wang², Chong Chen², Xueqing Fu³, Yuan Pan⁴, Hongchuan Xin³, Zhong Wang³, Yukun Lu², Xuebing Li³, Runduo Zhang⁵, Yunqi Liu⁶

Affiliations

¹ State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China; Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China. Electronic address: fengchao@qibebt.ac.cn.
² State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China.
³ Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China.
⁴ State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China. Electronic address: panyuan@upc.edu.cn.
⁵ State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China.
⁶ State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China. Electronic address: liuyq@upc.edu.cn.

PMID: 37460387
DOI: 10.1016/j.jcis.2023.07.076

Abstract

Adjusting the interaction between dual active components for enhancing volatile organic compounds (VOCs) degradation is an effective but still challenging means of air pollution control. Herein, a limited pyrolysis oxidation strategy was adopted to prepare Pd-Mn₃O₄ spinel catalysts with uniform morphology and active component dispersion. Among these, 1.08Pd-Mn₃O₄ presented the highest catalytic efficiency with a T₉₀ value of 240 °C, which was 94 °C lower than that of Mn₃O₄. Characterization and density functional theory (DFT) calculation results revealed that the strong metal-support interaction (SMSI) effect between Pd and Mn₃O₄ promoted the redistribution of surface charges, thus strengthening the oxidation-reduction ability of the active sites. Moreover, the SMSI effect led to a better migration of surface oxygen species, and boosted the generation of active surface oxygen species. Simultaneously, the Pd catalyst further reduced the energy barrier in the initial stage of the dehydrogenation of propane. Overall, this study provided a novel design strategy for dual active components catalysts with SMSI effect and extended the application of these catalysts in the important field of VOCs elimination.

Keywords: Highly distribution; Oxygen vacancy; Pd-Mn(3)O(4); Propane oxidation; Strong metal-support interaction.