Water Splitting with Enhanced Efficiency Using a Nickel-Based Co-Catalyst at a Cupric Oxide Photocathode
| Autor: | Maxime Contreras, Carmelo Lo Vecchio, G. Giacoppo, Vincenzo Baglio, María Isabel Díez García, O. Barbera, S. Trocino, Roberto Gómez, Antonino S. Aricò |
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| Přispěvatelé: | Universidad de Alicante. Departamento de Química Física, Universidad de Alicante. Instituto Universitario de Electroquímica, Grupo de Fotoquímica y Electroquímica de Semiconductores (GFES) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
low-cost semiconductors
Materials science Analytical chemistry Oxide solar to hydrogen efficiency 02 engineering and technology Nickel based TP1-1185 010402 general chemistry 7. Clean energy 01 natural sciences Catalysis Photocathode Solar to hydrogen efficiency chemistry.chemical_compound Photoelectrolysis Cupric oxide photocathode media_common.cataloged_instance Química Física Physical and Theoretical Chemistry European union QD1-999 Photoelectrochemical cell media_common tandem cell Horizon (archaeology) Chemical technology cupric oxide photocathode 021001 nanoscience & nanotechnology 0104 chemical sciences Chemistry chemistry Low-cost semiconductors Tandem cell photoelectrochemical cell Water splitting Ni-based co-catalysts 0210 nano-technology |
| Zdroj: | Catalysts Volume 11 Issue 11 RUA. Repositorio Institucional de la Universidad de Alicante Universidad de Alicante (UA) Catalysts, Vol 11, Iss 1363, p 1363 (2021) Catalysts 11 (2021). doi:10.3390/catal11111363 info:cnr-pdr/source/autori:Lo Vecchio C.; Trocino S.; Giacoppo G.; Barbera O.; Baglio V.; Diez-Garcia M.I.; Contreras M.; Gomez R.; Arico A.S./titolo:Water splitting with enhanced efficiency using a nickel-based co-catalyst at a cupric oxide photocathode/doi:10.3390%2Fcatal11111363/rivista:Catalysts/anno:2021/pagina_da:/pagina_a:/intervallo_pagine:/volume:11 |
| ISSN: | 2073-4344 |
| DOI: | 10.3390/catal11111363 |
| Popis: | Homemade non-critical raw materials such as Ni or NiCu co-catalysts were added at the photocathode of a tandem cell, constituted by photoelectrodes made of earth-abundant materials, to generate green solar hydrogen from photoelectrochemical water splitting. Oxygen evolving at the Ti-and-P-doped hematite/TCO-based photoanode and hydrogen at the cupric oxide/GDL-based photocathode are separated by an anion exchange polymer electrolyte membrane placed between them. The effect of the aforementioned co-catalysts was studied in a complete PEC cell in the presence of the ionomer dispersion and the anionic membrane to evaluate their impact under practical conditions. Notably, different amounts of Ni or NiCu co-catalysts were used to improve the hydrogen evolution reaction (HER) kinetics and the overall solar-to-hydrogen (STH) efficiency of the photoelectrochemical cells. At −0.6 V, in the bias-assisted region, the photocurrent density reaches about 2 mA cm−2 for a cell with 12 µg cm−2 of Ni loading, followed by 1.75 mA cm−2 for the cell configuration based on 8 µg cm−2 of NiCu. For the best-performing cell, enthalpy efficiency at −0.4 V reaches a first maximum value of 2.03%. In contrast, the throughput efficiency, which is a ratio between the power output and the total power input (solar + electric) provided by an external source, calculated at −1.225 V, reaches a maximum of 10.75%. This value is approximately three times higher than the best results obtained in our previous studies without the use of co-catalysts at the photocathode. The authors gratefully acknowledge funding from the European Union’s Horizon 2020 research and innovation program under grant agreement no. 760930 (FotoH2 project). |
| Databáze: | OpenAIRE |
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