材料科学
化学工程
催化作用
碳纤维
介质阻挡放电
氧化物
吸附
等离子体
拉曼光谱
无定形碳
氧气
纳米技术
无定形固体
电介质
有机化学
化学
复合材料
物理
光电子学
光学
量子力学
复合数
工程类
冶金
作者
Abd H. Babikir,U.G. Mihiri Ekanayake,Olawale Oloye,James D. Riches,Kostya Ostrikov,Anthony P. O’Mullane
标识
DOI:10.1002/adfm.202307846
摘要
Abstract Carbon dioxide is a greenhouse gas that contributes to global warming but fortunately can be removed via chemical conversion processes that often involve a reduction step. Dielectric barrier discharge (DBD) plasma is an effective way to promote chemical reduction processes but requires a catalyst for energetically demanding reactions. In this study, the rapid conversion of CO 2 into solid carbon via a DBD plasma is reported using dispersed liquid metal Ga which is first converted into GaOOH particles to ultimately form a GaOOH/C nanocomposite. Raman and X‐ray diffraction (XRD) experiments indicate that amorphous activated carbon is formed after the plasma treatment. Further analysis demonstrates that highly dispersed sub‐nano‐sized carbon particles containing oxygen functional groups are formed uniformly on the GaOOH surface. The CO 2 conversion mechanism suggests that plasma electrons activate CO 2 molecules, while plasma‐generated oxygen vacancies on the catalyst surface help dissociate CO 2 into solid carbon. This work opens a new approach for synthesizing materials comprising of highly dispersed sub‐nano‐sized carbon on a metal oxide support suitable for other applications such as adsorption, heterogenous catalysis, and energy conversion.
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