Browse by author
Lookup NU author(s): Dr Abigail Seddon, Dr Joshua Karlsson, Professor Elizabeth GibsonORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2022 Johnson Matthey Public Limited Company. All rights reserved. Photoelectrocatalysis offers a way to generate hydrogen and oxygen from water under ambient light. Here, a series of hydrogen evolving photocatalysts based on a ruthenium(II) bipyridyl sensitiser covalently linked to platinum or palladium catalytic centres were adsorbed onto mesoporous nickel oxide and tested for hydrogen evolution in a photoelectrochemical half-cell. The electrolyte buffer was varied and certain catalysts performed better at pH 7 than pH 3 (for example, PC3 with photocurrent density = 8 µA cm–2), which is encouraging for coupling with an oxygen evolving photoanode in tandem water splitting devices. The molecular catalysts were surprisingly robust when integrated into devices, but the overall performance appears to be limited by rapid recombination at the photocatalyst|NiO interface. Our findings provide further insight towards basic design principles for hydrogen evolving photoelectrochemical systems and guidelines for further development.
Author(s): Seddon AA, Karlsson JKG, Gibson EA, O'Reilly L, Kaufmann M, Vos JG, Pryce MT
Publication type: Article
Publication status: Published
Journal: Johnson Matthey Technology Review
Year: 2022
Volume: 66
Issue: 1
Pages: 21-31
Print publication date: 01/01/2022
Online publication date: 20/07/2021
Acceptance date: 19/07/2021
Date deposited: 23/06/2022
ISSN (electronic): 2056-5135
Publisher: Johnson Matthey Public Limited Company
URL: https://doi.org/10.1595/205651322X16269403109779
DOI: 10.1595/205651322X16269403109779
Altmetrics provided by Altmetric