open access

https://hdl.handle.net/2115/84750

Solar-driven production of hydrogen and acetaldehyde from ethanol on Ni-Cu bimetallic catalysts with solar-to-fuels conversion efficiency up to 3.8 %

英語

Hot electrons

2020-09-05

Elsevier

Applied Catalysis B-environmental

272

118965

Catalytic ethanol dehydrogenation is recognized as a promising approach to produce valuable chemical stocks, yet its industrialization suffers from high energy consumption. Here, we present an efficient solar-driven ethanol dehydrogenation process using a low-cost Ni-Cu bimetallic catalyst for the high-yield and selective production of H-2 and acetaldehyde. Under the irradiation of focused simulated solar light, 176.6 mmol g(catalyst)(-1) h(-1) of H-2 production rate with a high solar-to-fuel conversion efficiency (3.8 %) was achieved without additional thermal energy input, which is far more efficient than any previously reported photocatalytic ethanol dehydrogenation systems. Mechanistic investigations revealed that photothermal heating and hot carrier generation over Ni-Cu catalysts took responsibilities for the high activity. Hot electrons generated from Cu nanoparticles could migrate to Ni atoms, which simultaneously favored the separation of charge carriers and the activation of adsorbates. This study opens a promising pathway toward solar-energy conversion technology and advanced cost-effective industrial processes.

学術雑誌論文

Accepted Manuscript

Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

© <2020>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

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