International Journal of Hydrogen Energy, ( ISI ), Volume (48), No (28), Year (2022-12) , Pages (10477-10492)

Title : ( Pulsed sonoelectrodeposition of leaf-like Bi2WO6 film with exposed [001] facet as a photocathode with a remarkable high photovoltage in water splitting )

Authors: Mahboobeh Zargazi , Mohammad Hassan Entezari ,

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Abstract

Bi2WO6 is one of the promising triplet bismuth compound that has a layered structure with a high photocatalytic activity for photo-electrochemical (PEC) water splitting systems. Here, Bi2WO6 synthesizes by the sonoelectrochemical method in pulse mode of ultrasound. Unexpectedly, synthetic samples show photocathode rather than photoanode activity in PEC systems. Applying of this method creates a leaf-like morphology with exposed [001] crystal facet and controllable amount of surface defects. The co-existence of oxygen and metal vacancies play a significant role in suppressing charge recombination and enhancing charge transporting in photoelectrodes. The creation of high surface vacancies leads to change the conduction and valence band positions and cause hydrogen evolution by Bi2WO6 photoelectrodes. Another surprising result for the synthesized film by pulse mode is the creation of high photovoltage about 1.25 V that has a remarkable effect in suppressing charge recombination rate and proposed driving force for water reduction. Furthermore, the onset potential of the photoelectrodes improves and records high

Keywords

Bi2WO6 Sonoelectrochemical deposition photoelectrode Vacancy
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@article{paperid:1092769,
author = {Zargazi, Mahboobeh and Entezari, Mohammad Hassan},
title = {Pulsed sonoelectrodeposition of leaf-like Bi2WO6 film with exposed [001] facet as a photocathode with a remarkable high photovoltage in water splitting},
journal = {International Journal of Hydrogen Energy},
year = {2022},
volume = {48},
number = {28},
month = {December},
issn = {0360-3199},
pages = {10477--10492},
numpages = {15},
keywords = {Bi2WO6 Sonoelectrochemical deposition photoelectrode Vacancy},
}

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%0 Journal Article
%T Pulsed sonoelectrodeposition of leaf-like Bi2WO6 film with exposed [001] facet as a photocathode with a remarkable high photovoltage in water splitting
%A Zargazi, Mahboobeh
%A Entezari, Mohammad Hassan
%J International Journal of Hydrogen Energy
%@ 0360-3199
%D 2022

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