Manganese-cerium composite oxide pyrolyzed from metal organic framework supporting palladium nanoparticles for efficient toluene oxidation

Sung Hyok Ri; Fukun Bi; Aili Guan; Xiaodong Zhang

doi:10.1016/j.jcis.2020.11.008

Manganese-cerium composite oxide pyrolyzed from metal organic framework supporting palladium nanoparticles for efficient toluene oxidation

J Colloid Interface Sci. 2021 Mar 15:586:836-846. doi: 10.1016/j.jcis.2020.11.008. Epub 2020 Nov 6.

Authors

Sung Hyok Ri¹, Fukun Bi², Aili Guan³, Xiaodong Zhang⁴

Affiliations

¹ School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China; Ri Su Bok Sunchon Chemical Engineering University, Pyongan Suoth Province, Democratic People's Republic of Korea.
² School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
³ Department of Cardiology, Heart Center, Qingdao Municipal Hospital, Qingdao University, Qingdao, Shandong 266071, China.
⁴ School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China. Electronic address: zhangxiaodong@usst.edu.cn.

PMID: 33208244
DOI: 10.1016/j.jcis.2020.11.008

Abstract

Manganese-cerium metal oxide with flocculent structure prepared via the pyrolysis of Mn/Ce-MOF and supported Pd were applied for the catalytic oxidation of toluene. The Pd/Mn3Ce2-300 catalyst could completely oxidize toluene at 190 °C, which presented excellent catalytic performance. Moreover, Pd/Mn3Ce2-300 possessed great reusability, stability and water resistance even under 10 vol% water vapors. A series of characterizations including X-ray diffraction (XRD), N₂ adsorption-desorption, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and H₂ temperature programmed reduction (H₂-TPR) were used to investigate the physicochemical properties of the samples. It was found that Pd/Mn3Ce2-300 possessed a better reduction ability at low temperature, more surface absorbed oxygen and surface Pd species, and a strong interaction between Pd and Mn3Ce2-300, resulting in great catalytic performance for toluene degradation.

Keywords: MOFs; Pyrolysis; Supported Pd catalysts; Toluene oxidation; Water resistance.