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Hydrogen Spillover Facilitating Reduction of Surface Oxygen Species on Porous Carbon
Author(s) -
Zheng Zhuangzhuang,
Chen Mingming,
Zheng Xuewen,
Liu Kunlin,
Yang Ting,
Zhang Jizong
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100292
Subject(s) - hydrogen spillover , catalysis , hydrogen , carbon fibers , oxygen , materials science , x ray photoelectron spectroscopy , adsorption , chemical engineering , porosity , inorganic chemistry , chemistry , organic chemistry , composite material , composite number , engineering
Surface oxygen‐containing functional groups of porous carbon have great influence on its various properties, including the catalytic performance, chemical stability, and adsorption capacity. In this paper, a catalytic hydrogen spillover method was proposed to prepare porous carbons with low oxygen content in 7 vol % H 2 /Ar atmosphere. Pt/C was used as the catalyst. Petroleum coke‐based porous carbon was adopted as the model material to study hydrogen spillover reduction effect within the temperature range of 500–700 °C. XRD, Raman and XPS were used to characterize the microstructures and surface chemical composition of prepared materials. Compared with H 2 reduction, hydrogen spillover reduction can further increase graphitic degree of porous carbon without destroying the morphology and pore structure, and can reduce the contents of surface oxygen‐containing groups of porous carbon more effectively. And among different kinds of oxygen‐containing groups, the more reactive hydrogen atoms dissociated by Pt/C catalyst have the best reduction effect on C−O species.