Photocatalytic H2O2 generation assisted photoelectrochemical water oxidation for enhanced BiVO4 photoanode performance

A method is devised to integrate a photocatalytic and photoelectrochemical (PEC) systems to achieve enhanced water oxidation performance of a BiVO4 photoanode. The reduced gC3N4 (R-gC3N4) photocatalyst suspended in the anode compartment electrolyte of the PEC cell can serve as an agent to integrate...

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Autores principales:	Aditya Singh, Satirtha K Sarma, Sujay Karmakar, Suddhasatwa Basu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Reduced gC3N4 Hole scavenger BiVO4 photoanode Neutral water splitting Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/6aa098eafb9847f082e0268903ea5405
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spelling	oai:doaj.org-article:6aa098eafb9847f082e0268903ea54052021-11-18T04:52:43ZPhotocatalytic H2O2 generation assisted photoelectrochemical water oxidation for enhanced BiVO4 photoanode performance2666-821110.1016/j.ceja.2021.100142https://doaj.org/article/6aa098eafb9847f082e0268903ea54052021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121000582https://doaj.org/toc/2666-8211A method is devised to integrate a photocatalytic and photoelectrochemical (PEC) systems to achieve enhanced water oxidation performance of a BiVO4 photoanode. The reduced gC3N4 (R-gC3N4) photocatalyst suspended in the anode compartment electrolyte of the PEC cell can serve as an agent to integrate the systems. The performance of BiVO4 photoanode in PEC water splitting is hampered by the surface states back electron-hole recombination. This is overcomed by incorporating R-gC3N4 in the electrolyte to produce hydroxyl radicals and hydrogen peroxide reactive intermediates, thereby reducing the onset potential for oxygen evolution reaction in the BiVO4 photoanode. The enhanced charge-transfer for water oxidation reaction kinetics at the photoanode/electrolyte interface is observed by suspending R-gC3N4 photocatalyst in the electrolyte. Approximately 3-fold increase in photocurrent density (105 μA/cm2 at 1.23 V vs. RHE) and a significant reduction in the onset potential (395 mV vs. RHE) of the BiVO4 photoanode is observed in R-gC3N4 + 2-propanol + 0.1 M PBS electrolyte. The application of R-gC3N4 photocatalyst to promote the reactivity of neutral pH electrolytes introduces a new paradigm for hydrogen generation.Aditya SinghSatirtha K SarmaSujay KarmakarSuddhasatwa BasuElsevierarticleReduced gC3N4Hole scavengerBiVO4 photoanodeNeutral water splittingChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 8, Iss , Pp 100142- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Reduced gC3N4 Hole scavenger BiVO4 photoanode Neutral water splitting Chemical engineering TP155-156
spellingShingle	Reduced gC3N4 Hole scavenger BiVO4 photoanode Neutral water splitting Chemical engineering TP155-156 Aditya Singh Satirtha K Sarma Sujay Karmakar Suddhasatwa Basu Photocatalytic H2O2 generation assisted photoelectrochemical water oxidation for enhanced BiVO4 photoanode performance
description	A method is devised to integrate a photocatalytic and photoelectrochemical (PEC) systems to achieve enhanced water oxidation performance of a BiVO4 photoanode. The reduced gC3N4 (R-gC3N4) photocatalyst suspended in the anode compartment electrolyte of the PEC cell can serve as an agent to integrate the systems. The performance of BiVO4 photoanode in PEC water splitting is hampered by the surface states back electron-hole recombination. This is overcomed by incorporating R-gC3N4 in the electrolyte to produce hydroxyl radicals and hydrogen peroxide reactive intermediates, thereby reducing the onset potential for oxygen evolution reaction in the BiVO4 photoanode. The enhanced charge-transfer for water oxidation reaction kinetics at the photoanode/electrolyte interface is observed by suspending R-gC3N4 photocatalyst in the electrolyte. Approximately 3-fold increase in photocurrent density (105 μA/cm2 at 1.23 V vs. RHE) and a significant reduction in the onset potential (395 mV vs. RHE) of the BiVO4 photoanode is observed in R-gC3N4 + 2-propanol + 0.1 M PBS electrolyte. The application of R-gC3N4 photocatalyst to promote the reactivity of neutral pH electrolytes introduces a new paradigm for hydrogen generation.
format	article
author	Aditya Singh Satirtha K Sarma Sujay Karmakar Suddhasatwa Basu
author_facet	Aditya Singh Satirtha K Sarma Sujay Karmakar Suddhasatwa Basu
author_sort	Aditya Singh
title	Photocatalytic H2O2 generation assisted photoelectrochemical water oxidation for enhanced BiVO4 photoanode performance
title_short	Photocatalytic H2O2 generation assisted photoelectrochemical water oxidation for enhanced BiVO4 photoanode performance
title_full	Photocatalytic H2O2 generation assisted photoelectrochemical water oxidation for enhanced BiVO4 photoanode performance
title_fullStr	Photocatalytic H2O2 generation assisted photoelectrochemical water oxidation for enhanced BiVO4 photoanode performance
title_full_unstemmed	Photocatalytic H2O2 generation assisted photoelectrochemical water oxidation for enhanced BiVO4 photoanode performance
title_sort	photocatalytic h2o2 generation assisted photoelectrochemical water oxidation for enhanced bivo4 photoanode performance
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/6aa098eafb9847f082e0268903ea5405
work_keys_str_mv	AT adityasingh photocatalytich2o2generationassistedphotoelectrochemicalwateroxidationforenhancedbivo4photoanodeperformance AT satirthaksarma photocatalytich2o2generationassistedphotoelectrochemicalwateroxidationforenhancedbivo4photoanodeperformance AT sujaykarmakar photocatalytich2o2generationassistedphotoelectrochemicalwateroxidationforenhancedbivo4photoanodeperformance AT suddhasatwabasu photocatalytich2o2generationassistedphotoelectrochemicalwateroxidationforenhancedbivo4photoanodeperformance
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Photocatalytic H2O2 generation assisted photoelectrochemical water oxidation for enhanced BiVO4 photoanode performance

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