TY - JOUR
T1 - Understanding the unique Ohmic-junction for enhancing the photocatalytic activity of CoS2/MgIn2S4 towards hydrogen production
AU - Li, Jiangshan
AU - Yao, Jun
AU - Yu, Qiang
AU - Zhang, Xiao
AU - Carabineiro, Sónia A. C.
AU - Xiong, Xianqiang
AU - Wu, Chenglin
AU - Lv, Kangle
N1 - Funding Information:
info:eu-repo/grantAgreement/FCT/Concurso para Atribuição do Estatuto e Financiamento de Laboratórios Associados (LA)/LA%2FP%2F0008%2F2020/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50006%2F2020/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT#
info:eu-repo/grantAgreement/FCT/CEEC INST 2018/CEECINST%2F00102%2F2018%2FCP1567%2FCT0026/PT#
This work was supported by the National Natural Science Foundation of China (22102112 and 51672312), joint supported by Hubei Provincial Natural Science Foundation and Huangshi of China (2022CFD001), the Domestic Visiting Scholar "Teacher Professional Development Project" (FX2023052), the Zhejiang Provincial Natural Science Foundation of China (LQ21B030003), and the “Pioneer” and “Leading Goose” R&D Program of Zhejiang (2023C03135), the Fundamental Research Funds for the Central Universities, South-Central Minzu University (CZP22001 & CZZ21012)
Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/8/15
Y1 - 2024/8/15
N2 - MgIn2S4 is a photocatalyst with a suitable band gap for renewable energy production, but its effectiveness is hindered by pronounced photocorrosion, insufficient surface active sites and rapid charge recombination. Herein, we report the synthesis of CoS2/MgIn2S4 Ohmic junction with a robust internal electric field. The optimized CoS2/MgIn2S4 photocatalyst with a CoS2 loading of 20.5 wt%, depicts a maximum H2 evolution rate of 290 μmol g−1 h−1, which is 3.1 times higher than the value of MgIn2S4. The improved photocatalytic activity of CoS2/MgIn2S4 can be attributed to the intimate Ohmic junction at the CoS2/MgIn2S4 interface, which promotes effective photoelectron transfer from MgIn2S4 to CoS2. Simultaneously, CoS2 can act as an efficient surface cocatalyst, with an optimal hydrogen-adsorption Gibbs free energy, enabling highly efficient proton reduction at the catalyst/H2O interface. The present work introduces a novel approach to modulate interfaces, creating transition metal sulfide cocatalysts for photocatalysts, resulting in high photocatalytic performance.
AB - MgIn2S4 is a photocatalyst with a suitable band gap for renewable energy production, but its effectiveness is hindered by pronounced photocorrosion, insufficient surface active sites and rapid charge recombination. Herein, we report the synthesis of CoS2/MgIn2S4 Ohmic junction with a robust internal electric field. The optimized CoS2/MgIn2S4 photocatalyst with a CoS2 loading of 20.5 wt%, depicts a maximum H2 evolution rate of 290 μmol g−1 h−1, which is 3.1 times higher than the value of MgIn2S4. The improved photocatalytic activity of CoS2/MgIn2S4 can be attributed to the intimate Ohmic junction at the CoS2/MgIn2S4 interface, which promotes effective photoelectron transfer from MgIn2S4 to CoS2. Simultaneously, CoS2 can act as an efficient surface cocatalyst, with an optimal hydrogen-adsorption Gibbs free energy, enabling highly efficient proton reduction at the catalyst/H2O interface. The present work introduces a novel approach to modulate interfaces, creating transition metal sulfide cocatalysts for photocatalysts, resulting in high photocatalytic performance.
KW - CoS
KW - MgInS
KW - Ohmic junction
KW - Photocatalytic hydrogen production
UR - http://www.scopus.com/inward/record.url?scp=85188560642&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2024.123950
DO - 10.1016/j.apcatb.2024.123950
M3 - Article
AN - SCOPUS:85188560642
SN - 0926-3373
VL - 351
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 123950
ER -