Photoelectrocatalytic Reduction of CO2 to Chemicals via ZnO@Nickel Foam: Controlling C–C Coupling by Ligand or Morphology
- 108 Downloads
The CO2 reduction is a very attracting research field in the environmental, material and chemical sciences in light of the energy crisis and greenhouse effect. A new photoelectrocatalytic system composed of a photoanode BiVO4 and a photocathode of nickel foam supported ZnO semiconductor was designed, assembled and applied to CO2 reduction in water. The photocathodes with different morphology could be made from electrochemical deposition method and well characterized by SEM, UV–Vis, XRD, and XPS. The photoelectrocatalytic cell of ZnO/Ni-30|KHCO3|BiVO4 can produce ethanol and acetic acid in a rate of 12.5 µM h−1 cm−2 with 100% selectivity for C2 product, attributing to the controlling of 3D-spaces of nanorod. The cell of A-ZnO/Ni-15|KHCO3|BiVO4 produces ethanol and acetic acid with 75% selectivity for C2 product under 100 mW cm−2 simulated sunlight irradiation, attributing to controlling of both amine ligand and morphology of ZnO, which reveal a new way to increase the selectivity of products.
KeywordsPhotoelectrocatalytic CO2 reduction C–C coupling Morphology Ligand
This study was funded by the National Natural Science Foundation of China (NSFC 21173106), Natural Science Foundation of Gansu Province (17JR5RA212) and the Foundation of State Key Laboratory of Coal Conversion (J17-18-913-2).
- 5.Meng X, Yu Q, Liu G, Shi L, Zhao G, Liu H, Li P, Chang K, Kako T, Ye J (2017) Efficient photocatalytic CO2 reduction in all-inorganic aqueous environment: cooperation between reaction medium and Cd(II) modified colloidal ZnS. Nano Energy 34:524–532. https://doi.org/10.1016/j.nanoen.2017.03.021 CrossRefGoogle Scholar
- 11.Torelli DA, Francis SA, Crompton JC, Javier A, Thompson JR, Brunschwig BS, Soriaga MP, Lewis NS (2016) Nickel–gallium-catalyzed electrochemical reduction of CO2 to highly reduced products at low overpotentials. ACS Catal 6(3):2100–2104. https://doi.org/10.1021/acscatal.5b02888 CrossRefGoogle Scholar
- 22.Tu W, Zhou Y, Liu Q, Yan S, Bao S, Wang X, Xiao M, Zou Z (2013) An in situ simultaneous reduction-hydrolysis technique for fabrication of TiO2-graphene 2D sandwich-like hybrid nanosheets: graphene-promoted selectivity of photocatalytic-driven hydrogenation and coupling of CO2 into methane and ethane. Adv Funct Mater 23(14):1743–1749. https://doi.org/10.1002/adfm.201202349 CrossRefGoogle Scholar
- 25.Billo T, Fu FY, Raghunath P, Shown I, Chen WF, Lien HT, Shen TH, Lee JF, Chan TS, Huang KY, Wu CI, Lin MC, Hwang JS, Lee CH, Chen LC, Chen KH (2018) Ni-nanocluster modified black TiO2 with dual active sites for selective photocatalytic CO2 reduction. Small. https://doi.org/10.1002/smll.201702928 CrossRefPubMedGoogle Scholar
- 34.Gao S, Gu B, Jiao X, Sun Y, Zu X, Yang F, Zhu W, Wang C, Feng Z, Ye B, Xie Y (2017) Highly efficient and exceptionally durable CO2 photoreduction to methanol over freestanding defective single-unit-cell bismuth vanadate layers. J Am Chem Soc 139(9):3438–3445. https://doi.org/10.1021/jacs.6b11263 CrossRefPubMedGoogle Scholar
- 35.Liu Y, Zhang Y, Cheng K, Quan X, Fan X, Su Y, Chen S, Zhao H, Zhang Y, Yu H, Hoffmann MR (2017) Selective electrochemical reduction of carbon dioxide to ethanol on a boron-and nitrogen-co-doped nanodiamond. Angew Chem Int 129(49):15813–15817. https://doi.org/10.1002/ange.201706311 CrossRefGoogle Scholar
- 46.Jin A, Jia Y, Chen C, Liu X, Jiang J, Chen X, Zhang F (2017) Efficient photocatalytic hydrogen evolution on band structure tuned polytriazine/heptazine based carbon nitride heterojunctions with ordered needle-like morphology achieved by an in situ molten salt method. J Phys Chem C 121(39):21497–21509. https://doi.org/10.1021/acs.jpcc.7b07243 CrossRefGoogle Scholar
- 47.Gong Z-l, Tang D-y, Guo Y-d (2012) The fabrication and self-flocculation effect of hybrid TiO2 nanoparticles grafted with poly(N-isopropylacrylamide) at ambient temperature via surface-initiated atom transfer radical polymerization. J Mater Chem 22(33):16872–16879. https://doi.org/10.1039/c2jm32168h CrossRefGoogle Scholar