首页|S-scheme regulated Ni2P-NiS/twinned Mn0.5Cd0.5S hetero-homojunctions for efficient photocatalytic H2 evolution

S-scheme regulated Ni2P-NiS/twinned Mn0.5Cd0.5S hetero-homojunctions for efficient photocatalytic H2 evolution

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Effective bulk phase and surface charge separation is critical for charge utilization during the photo-catalytic energy conversion process.In this work,the ternary Ni2P-NiS/twinned Mn0.5Cd0.5S(T-MCS)nanohybrids were successfully constructed via combining Ni2P-NiS with T-MCS solid solution for visible light photocatalytic H2 evolution.T-MCS is composed of zinc blende Mn0.5Cd0.5S(ZB-MCS)and wurtzite Mn0.5Cd0.5S(WZ-MCS)and those two alternatively arranged crystal phases endow T-MCS with excellent bulk phase charge separation performance for the slight energy level difference between ZB-MCS and WZ-MCS.S-scheme carriers transfer route between NiS and T-MCS can accelerate the interfacial charge separation and retain the active electrons and holes,meanwhile,co-catalyst Ni2P as electron receiver and proton reduction center can further optimize the H2 evolution reaction kinetics based on the surface Schottky barrier effect.The above-formed homo-heterojunctions can establish multiple charge transfer channels in the bulk phase of T-MCS and interface of T-MCS and Ni2P-NiS.Under the synergistic effect of twinned homojunction,S-scheme heterojunction,and Schottky barrier,the ternary Ni2P-NiS/T-MCS com-posite manifested an H2 production rate of 122.5 mmol h-1 g-1,which was 1.33,1.24,and 2.58 times higher than those of the NiS/T-MCS(92.4 mmol h-1 g-1),Ni2P/T-MCS(98.4 mmol h-1 g-1),and T-MCS(47.5 mmol h-1 g-1),respectively.This work demonstrates a promising strategy to develop efficient sul-fides photocatalyst toward targeted solar-driven H2 evolution through homo-heterojunction engineering.

Photocatalytic H2 evolutionTwinned Mn0.5Cd0.5SHomojunctionS-scheme heterojunctionSchottky barrier

Qiqi Zhang、Zhen Wang、Yuhang Song Jun Fan、Tao Sun、Enzhou Liu

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School of Chemical Engineering/Xi'an Key Laboratory of Special Energy Materials,Northwest University,Xi'an 710069,China

国家自然科学基金国家自然科学基金国家自然科学基金Natural Science Basic Research Program of Shaanxi ProvinceShaanxi Key Science and Technology Innovation Team ProjectNational College Student Innovation and Entrepreneurship Training ProgramShiyanjia Lab

2207826121676213119742762023-JC-YB-1152022TD-33202210697069

2024

10.1016/j.jmst.2023.05.066

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.169(2)
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