选择性
催化作用
碳化
光热治疗
碳氢化合物
材料科学
能量转换效率
化学工程
化学
光化学
无机化学
吸附
纳米技术
有机化学
光电子学
工程类
作者
Chuqiao Song,Xi Liu,Ming Xu,Daniel Masi,Yigui Wang,Yuchen Deng,Mengtao Zhang,Xuetao Qin,Kai Feng,Jie Yan,Jing Leng,Zhaohua Wang,Yao Xü,Binhang Yan,Shengye Jin,Dongsheng Xu,Zhen Yin,Dequan Xiao,Ding Ma
出处
期刊:ACS Catalysis
日期:2020-08-17
卷期号:10 (18): 10364-10374
被引量:127
标识
DOI:10.1021/acscatal.0c02244
摘要
Conversion of CO2 into fuels via solar energy would be a promising strategy to reduce CO2 emissions and produce value-added carbon compounds. However, the development of efficient light-harvesting and photocatalytic systems remains a significant challenge because of scarcity of low-cost and high-efficiency catalysts in CO2 conversion. Herein, a tunable selectivity in photothermal CO2 conversion was demonstrated over a series of Fe-based catalysts developed through a simple hydrogenation/carbonization treatment with commercial Fe3O4 as a precursor. The Fe3O4 catalyst demonstrated a full selectivity toward CO (about 100%) and 11.3 mmol g–1 h–1 activity for the photothermal catalytic conversion of CO2. More importantly, the pure-phase θ-Fe3C produced remarkably high selectivity toward hydrocarbon products (>97%) and superior activity (10.9 mmol g–1 h–1) in the photothermal conversion of CO2. Meanwhile, it is found that the selectivity toward a hydrocarbon (CHx) can be modulated by the extent of hydrogenation/carbonization of the Fe3O4 precursor. In addition, we demonstrated the vital influence of the nonthermal effect on the enhanced catalytic performance with the Fe-based catalysts during the photothermal conversion of CO2.
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