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An Optically Transparent Iron Nickel Oxide Catalyst for Solar Water Splitting


Morales-Guio, Carlos G; Mayer, Matthew T; Yella, Aswani; Tilley, S David; Grätzel, Michael; Hu, Xile (2015). An Optically Transparent Iron Nickel Oxide Catalyst for Solar Water Splitting. Journal of the American Chemical Society, 137(31):9927-9936.

Abstract

Sunlight-driven water splitting to produce hydrogen fuel is an attractive method for renewable energy conversion. Tandem photoelectrochemical water splitting devices utilize two photoabsorbers to harvest the sunlight and drive the water splitting reaction. The absorption of sunlight by electrocatalysts is a severe problem for tandem water splitting devices where light needs to be transmitted through the larger bandgap component to illuminate the smaller bandgap component. Herein, we describe a novel method for the deposition of an optically transparent amorphous iron nickel oxide oxygen evolution electrocatalyst. The catalyst was deposited on both thin film and high-aspect ratio nanostructured hematite photoanodes. The low catalyst loading combined with its high activity at low overpotential results in significant improvement on the onset potential for photoelectrochemical water oxidation. This transparent catalyst further enables the preparation of a stable hematite/perovskite solar cell tandem device, which performs unassisted water splitting.

Abstract

Sunlight-driven water splitting to produce hydrogen fuel is an attractive method for renewable energy conversion. Tandem photoelectrochemical water splitting devices utilize two photoabsorbers to harvest the sunlight and drive the water splitting reaction. The absorption of sunlight by electrocatalysts is a severe problem for tandem water splitting devices where light needs to be transmitted through the larger bandgap component to illuminate the smaller bandgap component. Herein, we describe a novel method for the deposition of an optically transparent amorphous iron nickel oxide oxygen evolution electrocatalyst. The catalyst was deposited on both thin film and high-aspect ratio nanostructured hematite photoanodes. The low catalyst loading combined with its high activity at low overpotential results in significant improvement on the onset potential for photoelectrochemical water oxidation. This transparent catalyst further enables the preparation of a stable hematite/perovskite solar cell tandem device, which performs unassisted water splitting.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:12 August 2015
Deposited On:13 Jan 2016 16:07
Last Modified:23 Sep 2018 05:57
Publisher:American Chemical Society (ACS)
ISSN:0002-7863
OA Status:Closed
Publisher DOI:https://doi.org/10.1021/jacs.5b05544
Project Information:
  • : FunderFP7
  • : Grant ID247404
  • : Project TitleMESOLIGHT - Mesoscopic Junctions for Light Energy Harvesting and Conversion
  • : FunderFP7
  • : Grant ID257096
  • : Project TitleCAT4ENSUS - Molecular Catalysts Made of Earth-Abundant Elements for Energy and Sustainability
  • : FunderFP7
  • : Grant ID621252
  • : Project TitlePECDEMO - Photoelectrochemical Demonstrator Device for Solar Hydrogen Generation
  • : FunderFP7
  • : Grant ID309223
  • : Project TitlePHOCS - Photogenerated Hydrogen by Organic Catalytic Systems

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