Cooperative effects of surface plasmon resonance and type-II band alignment to significantly boost photoelectrochemical H2 generation of TiO2/CdS/TiN nanorod array photoanode
Cooperative effects of surface plasmon resonance and type-II band alignment to significantly boost photoelectrochemical H2 generation of TiO2/CdS/TiN nanorod array photoanode
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DOI：
10.1016/j.apcatb.2023.122833
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发表时间：
2023-05
期刊：
影响因子：
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通讯作者：
Jianan Li;Lijuan Wang;Wenzhong Wang;Xinglin Jia;Yuanyuan Zhang;Hang Yang;Yujie Li;Qing Zhou-Qing-Z
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文献类型：
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作者：
Jianan Li;Lijuan Wang;Wenzhong Wang;Xinglin Jia;Yuanyuan Zhang;Hang Yang;Yujie Li;Qing Zhou-Qing-Z
在这里，我们首次展示了一种新型三元 TiO2/CdS/TiN 纳米棒阵列 (NRA) 光阳极，用于在无偏压模拟太阳光照射下高效光电化学产氢。三元光电阳极是通过用二维（2D）CdS纳米片和非金属等离子体TiN纳米颗粒修饰TiO2纳米棒阵列构建的。在这种新型光阳极中，具有大表面积的二维CdS纳米片不仅提高了可见光吸收，而且扩大了与TiO2的接触面积，形成有利于光生电子-空穴对分离和转移的II型能带结构。此外，2D CdS 纳米片提供了更多的位点来吸收 TiN 纳米颗粒，通过表面等离子体共振诱导的热电子注入进一步提高光子能量的利用。 TiO2/CdS/TiN NRA 光阳极的平均产氢率为 129.6 μmol cm−2h−1，是 TiO2NRA 光阳极的 4.2 倍。 TiO2/CdS/TiN NRA 光阳极的光电化学氢气产生的显着增强归因于有效的热电子注入和电荷分离。
Here, we demonstrate for the first time a novel ternary TiO2/CdS/TiN nanorod array (NRA) photoanode for high-efficiency photoelectrochemical H2generation under bias-free simulated sunlight illumination. The ternary photoanode was constructed through modifying TiO2nanorod arrays with two-dimensional (2D) CdS nanosheets and nonmetal plasmonic TiN nanoparticles. In this novel photoanode, 2D CdS nanosheets with large surface area not only improve visible light absorption, but also extend the contact area with TiO2to form type-II band structure favorable for the separation and transfer of photogenerated electron-hole pairs. Moreover, 2D CdS nanosheets provide more sites to absorb TiN nanoparticles to further boost photon energy utilization via surface plasmon resonance-induced hot electron injection. The TiO2/CdS/TiN NRA photoanode achieved an average H2generation rate of 129.6 μmol cm−2h−1, 4.2 times that of TiO2NRA photoanode. Substantially boosted photoelectrochemical H2generation of the TiO2/CdS/TiN NRA photoanode is attributed to effective hot-electron injection and charge separation.