A Multi‐layer Device for Light‐triggered Hydrogen Production from Alkaline Methanol

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A Multi‐layer Device for Light‐triggered Hydrogen Production from Alkaline Methanol

Wang, Y; Yao, E-P; Wu, L; Feldmann, J; Stolarczyk, J; (2021) A Multi‐layer Device for Light‐triggered Hydrogen Production from Alkaline Methanol. Angewandte Chemie International Edition , 60 pp. 26694-26701. 10.1002/anie.202109979. Green open access

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Abstract

Hydrogen production from methanol has attracted substantial interest because of the clean combustion of hydrogen and the convenience of methanol in storage and transportation. However, it requires high-temperature and high-pressure conditions to reform methanol with water to hydrogen with high turnover frequency (TOF, e.g. 10 4 moles of hydrogen per mole of Pt per hour). Here we show that hydrogen can be produced from alkaline methanol on a light-triggered multi-layer system with a very high hydrogen evolution rate up to ~1 μmol/s under the illumination of a standard Pt-decorated carbon nitride. The system can achieve a remarkable TOF up to 1.8×10 6 moles of hydrogen per mole of Pt per hour under mild conditions. The total turnover number (TTN) of 470,000 measured over 38 hours is among the highest reported. In addition, the system does not lead to any CO x emissions, hence it could feed clean hydrogen to fuel cells. In contrast to a slurry system, we show that the proposed multi-layer system avoids particle aggregation and leads to the effective use of light and Pt active sites. The performance is also attributed to the light-triggered reforming of alkaline methanol. This notable performance is a promising step toward practical light-driven hydrogen generation.

Type:	Article
Title:	A Multi‐layer Device for Light‐triggered Hydrogen Production from Alkaline Methanol
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1002/anie.202109979
Publisher version:	https://doi.org/10.1002/anie.202109979
Language:	English
Additional information:	This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI:	https://discovery.ucl.ac.uk/id/eprint/10136667