ZnBi38O60/Bi2O3 photocathode for hydrogen production from water splitting

被引：13
作者：
Amador Salomao, Pedro Emilio [1 ]
de Souza Barbosa, Luele Ribeiro [1 ]
Andrade, Tatiana Santos [1 ]
da Cruz Ferreira, Everson Junio [2 ]
Pereira, Manic Cesar [1 ]
机构：
[1] Fed Univ Jequitinhonha & Mucuri Valleys UFVJM, Inst Sci Engn & Technol ICET, Campus Mucuri, BR-39803371 Teofilo Otoni, MG, Brazil
[2] Fed Univ Itajuba UNIFEI, Campus Itabira, BR-35903087 Itabira, MG, Brazil
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2019年 / 44卷 / 54期
关键词：
Hydrogen; Photoelectrochemical; Water splitting; Photocathode; Energy conversion; Zinc bismuthate; CU2ZNSNS4; PHOTOCATHODES; DECOMPOSITION SYNTHESIS; ELECTRONIC-STRUCTURE; STORAGE; CU2O; PHOTOVOLTAGE; PERFORMANCE; EVOLUTION; EFFICIENT; CAFE2O4;
D O I：
10.1016/j.ijhydene.2019.09.147
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Hydrogen production from water splitting into photoelectrochemical cells is a promising alternative for reducing the use of fossil fuels. Here, we synthesize by spray pyrolysis a porous ZnBi38O60/gamma-Bi2O3 film with a surface area of 744 m(2) g(-1) for use as a photocathode in water-splitting cells. The film of ZnBi38O60 with 3 wt% Bi2O3 has 2.3 eV bandgap energy and a conduction band energy of -2.14 V vs. RHE at pH 6.99, which is thermodynamically suitable for reducing H+ to H-2. Under illumination, the film produces a current density of -1.55 mA cm(-2) at 0 V vs. RHE with an onset potential of 0.84 V vs. RHE. HC-STH efficiency is 0.09% at 0.17 V vs. RHE and IPCE at 0 V vs. RHE is 3.8% at 480 nm. Under continuous operation, the ZnBi38O60/gamma-Bi2O3 film shows a stable photocurrent of -0.4 mA cm (-2) at 0 V. vs. RHE for 1800 s with 100% Faradaic efficiency. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：28603 / 28612
页数：10
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