View in EDS

A bioinspired water oxidation catalyst that is ∼1/10th as active as the photosystem II oxygen evolving center at pH 7: a study of activity and stability factors.

Saved in:
Bibliographic Details
Title: A bioinspired water oxidation catalyst that is ∼1/10th as active as the photosystem II oxygen evolving center at pH 7: a study of activity and stability factors.
Authors: Boskovic, Danijel1 (AUTHOR), Terrett, Richard2 (AUTHOR), Longhurst, Matthew1 (AUTHOR), Basheer, Sabeel1,2,3 (AUTHOR), Ariafard, Alireza2 (AUTHOR), Wagner, Pawel1 (AUTHOR), Pace, Ronald J.2 (AUTHOR), Stranger, Rob2 (AUTHOR) Rob.Stranger@anu.edu.au, Swiegers, Gerhard F.1 (AUTHOR) swiegers@uow.edu.au
Source: Dalton Transactions: An International Journal of Inorganic Chemistry. 11/28/2024, Vol. 53, p17783-17788. 6p.
Subjects: Photosystems, Oxidation of water, Substrates (Materials science), Graphene oxide, Overpotential
Abstract: The activity and stability of a heterogeneous water oxidation catalyst inspired by the Photosystem II – Oxygen Evolving Center (PSII-OEC) is reported. Ca-doped birnessite MnOx supported on a liquid crystalline reduced graphene oxide (LCrGO) substrate exhibited unprecedented performance for an abiological catalyst at pH 7, including an exceedingly low onset overpotential of 0.52 V (vs. 0.48 V reported for the PSII-OEC, 0.75 V for Pt, and 0.72 V for birnesite MnOx) and remarkably high activity per unit area at 0.56 V overpotential (∼10% that of a hypothetical, closely-packed monolayer of OEC sites at their optimum density of 1014 sites per cm2). [ABSTRACT FROM AUTHOR]
Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:The activity and stability of a heterogeneous water oxidation catalyst inspired by the Photosystem II – Oxygen Evolving Center (PSII-OEC) is reported. Ca-doped birnessite MnOx supported on a liquid crystalline reduced graphene oxide (LCrGO) substrate exhibited unprecedented performance for an abiological catalyst at pH 7, including an exceedingly low onset overpotential of 0.52 V (vs. 0.48 V reported for the PSII-OEC, 0.75 V for Pt, and 0.72 V for birnesite MnOx) and remarkably high activity per unit area at 0.56 V overpotential (∼10% that of a hypothetical, closely-packed monolayer of OEC sites at their optimum density of 1014 sites per cm2). [ABSTRACT FROM AUTHOR]
ISSN:14779226
DOI:10.1039/d4dt02336f