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Atomic‐Scale Insights into the Low‐Temperature Oxidation of Methanol over a Single‐Atom Pt 1 ‐Co 3 O 4 Catalyst
Author(s) -
Jiang Zeyu,
Feng Xiangbo,
Deng Jianlin,
He Chi,
Douthwaite Mark,
Yu Yanke,
Liu Jian,
Hao Zhengping,
Zhao Zhen
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201902041
Subject(s) - catalysis , methanol , materials science , dissociation (chemistry) , density functional theory , adsorption , metal , electron transfer , atom (system on chip) , single crystal , atomic units , chemistry , inorganic chemistry , crystallography , computational chemistry , organic chemistry , physics , quantum mechanics , computer science , embedded system , metallurgy
Heterogeneous catalysts with single‐atom active sites offer a means of expanding the industrial application of noble metal catalysts. Herein, an atomically dispersed Pt 1 ‐Co 3 O 4 catalyst is presented, which exhibits an exceptionally high efficiency for the total oxidation of methanol. Experimental and theoretical investigations indicate that this catalyst consists of Pt sites with a large proportion of occupied high electronic states. These sites possess a strong affinity for inactive Co 2+ sites and anchor over the surface of (111) crystal plane, which increases the metal–support interaction of the Pt 1 ‐Co 3 O 4 material and accelerates the rate of oxygen vacancies regeneration. In turn, this is determined to promote the coadsorption of the probe methanol molecule and O 2 . Density functional theory calculations confirm that the electron transfer over the oxygen vacancies reduces both the methanol adsorption energy and activation barriers for methanol oxidation, which is proposed to significantly enhance the dissociation of the CH bond in the methanol decomposition reaction. This investigation serves as a solid foundation for characterizing and understanding single‐atom catalysts for heterogeneous oxidation reactions.