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Outstanding Water‐Resistance Pd‐Co Nanoparticles Functionalized Mesoporous Carbon Catalyst for CO Catalytic Oxidation at Room Temperature
Author(s) -
Han Weiliang,
Dong Fang,
Zhao Haijun,
Tang Zhicheng
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201800959
Subject(s) - catalysis , noble metal , mesoporous material , redox , chemical engineering , materials science , oxide , carbon fibers , particle size , metal , oxygen , nanoparticle , dispersion (optics) , particle (ecology) , transition metal , inorganic chemistry , chemistry , nanotechnology , composite number , organic chemistry , metallurgy , composite material , physics , oceanography , optics , geology , engineering
CO complete oxidation at room temperature under moisture has the key difficulty in low loading of noble metal compounds. In this paper, a series of Pd−Co functionalized mesoporous carbon‐based (meso‐C) catalysts were masterly designed, and meso‐C support was prepared by the hard template method. Pd−Co/meso‐C catalysts exhibited the high catalytic activity of CO oxidation, the superior Pd−Co/meso‐C catalyst showed excellent water‐resistance, which could maintain 100% conversion beyond 200 h at room temperature. Through a series of characterizations, the superior Pd−Co/meso‐C catalyst possessed higher activity due to smaller cobaltosic oxide (Co 3 O 4 ) particle size, excellent reducibility, abundant surface active oxygen species, higher tetravalent Pd content, etc. Therefore, it was concluded that the reaction mechanism of CO oxidation on Pd−Co/meso‐C followed the Langmuir‐Hinshelwood + Redox mechanism according to above characterization and activity results. The deactivation of noble metal catalyst was reasonably solved by controlling the dispersion and particle size of Pd−Co.