Protruding Pt single-sites on hexagonal ZnIn(2)S(4) to accelerate photocatalytic hydrogen evolution.
Protruding Pt single-sites on hexagonal ZnIn(2)S(4) to accelerate photocatalytic hydrogen evolution.
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六方ZnIn2S4上突出的Pt单点加速光催化析氢
DOI:
10.1038/s41467-022-28995-1
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发表时间:
2022-03-11
影响因子:
16.6
通讯作者:
Zhu M
中科院分区:
文献类型:
--
作者:
Shi X;Dai C;Wang X;Hu J;Zhang J;Zheng L;Mao L;Zheng H;Zhu M
Single-site cocatalysts engineered on supports offer a cost-efficient pathway to utilize precious metals, yet improving the performance further with minimal catalyst loading is still highly desirable. Here we have conducted a photochemical reaction to stabilize ultralow Pt co-catalysts (0.26 wt%) onto the basal plane of hexagonal ZnIn2S4 nanosheets (PtSS-ZIS) to form a Pt-S3 protrusion tetrahedron coordination structure. Compared with the traditional defect-trapped Pt single-site counterparts, the protruding Pt single-sites on h-ZIS photocatalyst enhance the H2 evolution yield rate by a factor of 2.2, which could reach 17.5 mmol g−1 h−1 under visible light irradiation. Importantly, through simple drop-casting, a thin PtSS-ZIS film is prepared, and large amount of observable H2 bubbles are generated, providing great potential for practical solar-light-driven H2 production. The protruding single Pt atoms in PtSS-ZIS could inhibit the recombination of electron-hole pairs and cause a tip effect to optimize the adsorption/desorption behavior of H through effective proton mass transfer, which synergistically promote reaction thermodynamics and kinetics.
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