Photothermal catalysis for CO<sub>2</sub> convert into C<sub>1</sub>–C<sub>3</sub> hydrocarbons by proton conductor BZCY532
Jindan Tian, Ya-Nan Ren, Lulu Liu, Qiangsheng Guo, Na Sha, Zhe Zhao
Abstract
Abstract Conversion of CO 2 into long-chain hydrocarbons is a potential applications in clean energy research. Here, we exhibit an efficient, stable and readily synthesized photocatalyst for the photocatalytic reduction of CO 2 . This is the first time that the proton conductor BZCY 532 as photocatalysts can harvest UV light for multielectron, multiproton reduction of CO 2 to C 1 (methane) , C 2 (ethane), and C 3 (propane) hydrocarbons. Under the photothermal coupling (350 °C + UV) condition, the total yield of CH 4 , C 2 H 6 and C 3 H 8 were 39.13 umol g −1 , 8.64 umol g −1 and 3.22 umol g −1 over the course of more than 5 h runs, respectively . The light and temperature attribute influence the selectivity of C 1 and C 2 , C 3 . In this approach, Ni, Co-doped BZCY532 were also studied and the results show that Ni, Co-doped BZCY532 have higher activity. Ni 0.05 and Co 0.05 obtained the yield of total CH 4 , C 2 H 6 , C 3 H 8 , which show about 5.6, 9.6, 3.9 and 6.8, 14.2, 6.7 times than BZCY532, respectively. The results proved that doping play a crucial role in improving photocatalytic activity of BZCY532. The formation of multi-carbon compounds maybe the faster proton transfer, which can harvest more electrons from the proton conductor catalysts and promote C–C coupling to form C 2 and C 3 . These findings elucidate BZCY-based proton conductor catalyst can be good candidate for the nature of photocatalysis, which involves the stage for the chemical bond formation by light excitation.