Synergistic Photocatalytic CO2 Reduction and Methanol Oxidation via Self-Photogenerated Oxygen Vacancy-Rich TiO2 Nanostructures

被引:2
作者
Mao, Haoning [1 ]
Tan, Yu [1 ]
Chen, Qiwen [1 ]
Cai, Minying [1 ]
Xu, Chao [1 ]
Yang, Tianzhen [1 ]
Gao, Qiongzhi [1 ]
Zhang, Shengsen [1 ]
Fang, Yueping [1 ]
Liu, Shijun [3 ]
Peng, Feng [2 ]
Yang, Siyuan [1 ]
机构
[1] South China Agr Univ, Coll Mat & Energy, Guangdong Lab Lingnan Modern Agr, Key Lab Biobased Mat & Energy,Minist Educ, Guangzhou 510642, Peoples R China
[2] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou, Peoples R China
[3] Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangdong Key Lab New & Renewable Energy Res & Dev, Guangzhou 510640, Peoples R China
基金
中国国家自然科学基金;
关键词
ohotocatalysis; CO2; reduction; methanoloxidation; TiO2; oxygen vacancy; SURFACE;
D O I
10.1021/acsanm.4c01281
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Integrating CO2 reduction with methanol oxidation presents a promising alternative strategy to store solar energy in CO2 reduction and produce more sustainable clean fuels and chemicals products, while identifying the carbon sources in the final products and elucidating the interactions between CO2 and methanol within such a mixed system is still particularly challenging. Herein, this study explores the efficiency of synergistic photocatalytic CO2 reduction and methanol oxidation via self-photogenerated oxygen vacancy-rich TiO2 nanostructures. Employing NMR spectroscopy and GC-MS analysis for (CO2)-C-13 isotope tracing samples, the exact carbon sources in both liquid and gas-phase products were clearly figure out. Moreover, through in situ DRIFTS analysis and DFT calculations, the crucial role of oxygen vacancies in enhancing catalytic activity and selectivity is revealed, and the CO2 reduction and methanol oxidation pathway on oxygen vacancy-rich TiO2 nanostructures are proposed. Consequently, our findings offer profound implications for advancing the field of synergistic photocatalytic processes, aiming to generate high-value chemical fuels sustainably.
引用
收藏
页码:12935 / 12943
页数:9
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