TY - JOUR
T1 - BiVO4/Bi4V2O10 isometallic heterojunction coupled with FeOOH/NiOOH cocatalysts for efficient photoelectrochemical water oxidation
AU - Fang, Guozhen
AU - Ruan, Xiaowen
AU - Meng, Depeng
AU - Xu, Minghua
AU - Ding, Chunsheng
AU - Huang, Chengxiang
AU - Qiu, Yu
AU - Zhao, Shengli
AU - Ba, Kaikai
AU - Xie, Tengfeng
AU - Zhou, Yong
AU - Zhang, Haiyan
AU - Zhang, Wei
AU - Jin, Shengye
AU - Leng, Jing
AU - Ravi, Sai Kishore
AU - Cui, Xiaoqiang
PY - 2025/2/26
Y1 - 2025/2/26
N2 - The four-electron water oxidation reaction in photoelectrochemical systems poses a major challenge to efficiently converting solar energy into chemical energy amid the global energy crisis. Herein, we report a strategy to develop a photoelectrochemical system using BiVO4/Bi4V2O10 isometallic heterojunction photoanodes paired with FeOOH/NiOOH cocatalysts to enhance water oxidation in neutral electrolytes. The results demonstrate that the BiVO4/Bi4V2O10/FeOOH/NiOOH photoanode achieves a photocurrent density of 4.48 mA/cm2 at 1.23 V versus the reversible hydrogen electrode and an applied bias photon-to-current efficiency of 1.69 % at 0.63 V versus the reversible hydrogen electrode—significantly outperforming bare BiVO4. This enhanced photoelectrochemical performance is attributed to the identical elemental composition and well-aligned energy band positions of Bi4V2O10 and BiVO4, which minimize charge recombination at the interface. Additionally, the FeOOH/NiOOH double-layer cocatalyst facilitates rapid transfer of photogenerated carriers, as confirmed by femtosecond transient absorption spectroscopy and transient photovoltage measurements. This approach provides a novel and effective pathway for advancing high-efficiency photoelectrochemical cells. © 2025 Elsevier Inc.
AB - The four-electron water oxidation reaction in photoelectrochemical systems poses a major challenge to efficiently converting solar energy into chemical energy amid the global energy crisis. Herein, we report a strategy to develop a photoelectrochemical system using BiVO4/Bi4V2O10 isometallic heterojunction photoanodes paired with FeOOH/NiOOH cocatalysts to enhance water oxidation in neutral electrolytes. The results demonstrate that the BiVO4/Bi4V2O10/FeOOH/NiOOH photoanode achieves a photocurrent density of 4.48 mA/cm2 at 1.23 V versus the reversible hydrogen electrode and an applied bias photon-to-current efficiency of 1.69 % at 0.63 V versus the reversible hydrogen electrode—significantly outperforming bare BiVO4. This enhanced photoelectrochemical performance is attributed to the identical elemental composition and well-aligned energy band positions of Bi4V2O10 and BiVO4, which minimize charge recombination at the interface. Additionally, the FeOOH/NiOOH double-layer cocatalyst facilitates rapid transfer of photogenerated carriers, as confirmed by femtosecond transient absorption spectroscopy and transient photovoltage measurements. This approach provides a novel and effective pathway for advancing high-efficiency photoelectrochemical cells. © 2025 Elsevier Inc.
KW - Bi4V2O10
KW - BiVO4
KW - Carrier dynamics
KW - Isometallic heterojunction
KW - Photoelectrochemical water oxidation
UR - http://www.scopus.com/inward/record.url?scp=85218899655&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85218899655&origin=recordpage
U2 - 10.1016/j.jcis.2025.02.180
DO - 10.1016/j.jcis.2025.02.180
M3 - RGC 21 - Publication in refereed journal
SN - 0021-9797
VL - 688
SP - 766
EP - 774
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -