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Photoelectrochemical Hydrogen Evolution Using Dye-Sensitised Nickel Oxide

Lookup NU author(s): 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.

Publication metadata

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


DOI: 10.1595/205651322X16269403109779


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Funder referenceFunder name
Irish Research Council