甲烷化
催化作用
一氧化碳
解吸
无机化学
化学吸附
物理吸附
镍
X射线光电子能谱
化学
材料科学
碳纤维
吸附
化学工程
有机化学
复合数
工程类
复合材料
作者
Khairul Naim Ahmad,Salma Samidin,Fairous Salleh,Wan Nor Roslam Wan Isahak,Ahmed A. Al-Amiery,Mohd Shahbudin Masdar,Muhammad Rahimi Yusop,Waleed Khalid Al‐Azzawi,Masli Irwan Rosli,Mohd Ambar Yarmo
标识
DOI:10.1002/slct.202202394
摘要
Abstract Graphitic carbon nitride (g‐C 3 N 4 ) has attracted much attention due to its unique polymeric structure of carbon and nitrogen in the form of heptazine units. In this study, a nickel catalyst supported on graphitic carbon nitride was prepared by a facile impregnation method. Ni/g‐C 3 N 4 desorption and reduction behaviors with carbon monoxide (CO) were investigated by temperature‐programmed desorption (TPD) and reduction (TPR). The chemisorption study of reduction and desorption behaviors of CO molecules on Ni/g‐C 3 N 4 catalyst is essential for CO methanation reaction. The as‐prepared Ni/g‐C 3 N 4 catalyst was also characterized by X‐ray diffraction (XRD), N 2 physisorption, and X‐ray photoelectron spectroscopy (XPS). It was found that the utilization of g‐C 3 N 4 as a catalyst support enhances the complete reduction of Ni species and CO desorption. This can be attributed to the role of g‐C 3 N 4 support as a reducing agent for Ni, as well as its basicity owing to the richness of nitrogen functional group. The good performance of Ni/g‐C 3 N 4 catalyst towards CO methanation can be ascribed to the improvement in adsorption and activation of CO molecules on the active sites and the number of surface basic sites.
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