Abstract
A novel copper(II) aspirinate complex easily deposited onto nanotubes of Ti/TiO2 was successfully employed in the conversion of CO2 to methanol through the use of UV-Vis irradiation coupled to a bias potential of −0.35 V vs saturated calomel electrode. An average concentration of 0.8 mmol L−1 of methanol was obtained in 0.1 mol L−1 of sodium sulfate saturated with CO2 using a self-organized Ti/TiO2 nanotubular array electrode coated with a [Cu2(asp)4] complex. The influence exerted by CO2 and the complex over the behavior of photocurrent vs potential curves is discussed. Furthermore, a complete investigation of all parameters that tend to influence the global process of methanol production by the photoelectrocatalytic method such as applied potential, electrolyte, and time is also thoroughly presented.
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Acknowledgements
The authors would like to express their sincerest gratitude and indebtedness to the Brazilian funding agencies FAPESP (2013/25343-8 and 2015/18109-4), CNPq (152274/2016-2 and 310421/2013-6), and CAPES for the financial support granted during the course of this research. FEG-SEM facilities were provided by LMA-IQ and X-ray diffraction measurements by GFQM-IQ. We are also grateful to Brian Newmann—the native English language content editor, for his painstaking proofreading and editing of the manuscript.
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Stülp, S., Cardoso, J.C., de Brito, J.F. et al. An Artificial Photosynthesis System Based on Ti/TiO2 Coated with Cu(II) Aspirinate Complex for CO2 Reduction to Methanol. Electrocatalysis 8, 279–287 (2017). https://doi.org/10.1007/s12678-017-0367-9
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DOI: https://doi.org/10.1007/s12678-017-0367-9