Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode

Abstract Photoelectrochemical (PEC) water splitting to produce solar fuel (hydrogen) has long been considered as the Holy Grail to a carbon-free hydrogen economy. The PEC concept to produce solar fuel is to emulate the natural photosynthesis using man made materials. The bottle-neck in realising the...

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Autores principales:	Govinder S. Pawar, Asif A. Tahir
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e0a1188671624fa694068ca7b264685e
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spelling	oai:doaj.org-article:e0a1188671624fa694068ca7b264685e2021-12-02T15:09:10ZUnbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode10.1038/s41598-018-21821-z2045-2322https://doaj.org/article/e0a1188671624fa694068ca7b264685e2018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-21821-zhttps://doaj.org/toc/2045-2322Abstract Photoelectrochemical (PEC) water splitting to produce solar fuel (hydrogen) has long been considered as the Holy Grail to a carbon-free hydrogen economy. The PEC concept to produce solar fuel is to emulate the natural photosynthesis using man made materials. The bottle-neck in realising the concept practically has been the difficulty in identifying stable low-cost semiconductors that meet the thermodynamic and kinetic criteria for photoelectrolysis. We have fabricated a novel p-type LaFeO3 photoelectrode using an inexpensive and scalable spray pyrolysis method. Our nanostructured LaFeO3 photoelectrode results in spontaneous hydrogen evolution from water without any external bias applied. Moreover, the photoelectrode has a faradaic efficiency of 30% and showed excellent stability over 21 hours. From optical and impedance data, the constructed band diagram showed that LaFeO3 can straddle the water redox potential with the conduction band at −1.11 V above the reduction potential of hydrogen. We have fabricated a low cost LaFeO3 photoelectrode that can spontaneously produce hydrogen from water using sunlight, making it a strong future candidate for renewable hydrogen generation.Govinder S. PawarAsif A. TahirNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Govinder S. Pawar Asif A. Tahir Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode
description	Abstract Photoelectrochemical (PEC) water splitting to produce solar fuel (hydrogen) has long been considered as the Holy Grail to a carbon-free hydrogen economy. The PEC concept to produce solar fuel is to emulate the natural photosynthesis using man made materials. The bottle-neck in realising the concept practically has been the difficulty in identifying stable low-cost semiconductors that meet the thermodynamic and kinetic criteria for photoelectrolysis. We have fabricated a novel p-type LaFeO3 photoelectrode using an inexpensive and scalable spray pyrolysis method. Our nanostructured LaFeO3 photoelectrode results in spontaneous hydrogen evolution from water without any external bias applied. Moreover, the photoelectrode has a faradaic efficiency of 30% and showed excellent stability over 21 hours. From optical and impedance data, the constructed band diagram showed that LaFeO3 can straddle the water redox potential with the conduction band at −1.11 V above the reduction potential of hydrogen. We have fabricated a low cost LaFeO3 photoelectrode that can spontaneously produce hydrogen from water using sunlight, making it a strong future candidate for renewable hydrogen generation.
format	article
author	Govinder S. Pawar Asif A. Tahir
author_facet	Govinder S. Pawar Asif A. Tahir
author_sort	Govinder S. Pawar
title	Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode
title_short	Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode
title_full	Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode
title_fullStr	Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode
title_full_unstemmed	Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode
title_sort	unbiased spontaneous solar fuel production using stable lafeo3 photoelectrode
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/e0a1188671624fa694068ca7b264685e
work_keys_str_mv	AT govinderspawar unbiasedspontaneoussolarfuelproductionusingstablelafeo3photoelectrode AT asifatahir unbiasedspontaneoussolarfuelproductionusingstablelafeo3photoelectrode
_version_	1718387907922755584

Unbiased Spontaneous Solar Fuel Production using Stable LaFeO3 Photoelectrode

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