Au-Cu2-xTe Plasmonic Heteronanostructure Photoelectrocatalysts.
Au-Cu2-xTe Plasmonic Heteronanostructure Photoelectrocatalysts.
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DOI：
10.1021/acs.jpclett.1c03222
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
Suvodeep Sen;Sanjib Shyamal;Shyamal Kumar Mehetor;Puspanjali Sahu;N. Pradhan
中科院分区：
文献类型：
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作者：
Suvodeep Sen;Sanjib Shyamal;Shyamal Kumar Mehetor;Puspanjali Sahu;N. Pradhan
半导体纳米晶体与等离子体金纳米粒子结合作为太阳能水分解的光电催化剂已被广泛研究。其中，铜硫属化物与金的异质结构因其双等离子激元特征而保持独特的类别。然而，虽然铜的硫化物和硒化物已被广泛报道，但碲化铜与金的异质结构尚未被探索。在此，研究人员探索了在 Au 纳米粒子（点上盘）上生长的等离子体半导体 Cu2-xTe 盘作为析氢反应（HER）的有效光电催化剂。这是通过在优化的反应条件下在预合成的 Au 纳米颗粒上生长 Cu2-xTe 盘而成功设计的。所得的异质结构纳米晶体可作为析氢反应的高效光电催化剂，在光存在下具有低塔菲尔斜率和较小的阴极过电势。这封信中研究并报告了它们的合成、表征、光学性质和电催化活性的详细信息。
Semiconductor nanocrystals coupled with plasmonic Au nanoparticles have been widely studied as photoelectrocatalysts for solar water splitting. Among these, heterostructures of copper chalcogenides with Au remained a unique category for their dual plasmon character. However, while sulfides and selenides of copper have been extensively reported, heterostructures of copper tellurides with Au have not been explored. Herein, the plasmonic semiconductor Cu2-xTe disks grown on Au nanoparticles (disk-on-dot) were explored as efficient photoelectrocatalysts for hydrogen evolution reactions (HER). This has been successfully designed by growing Cu2-xTe disks on presynthesized Au nanoparticles under optimized reaction conditions. The resulting heterostructured nanocrystals acted as efficient photoelectrocatalysts for the H2 evolution reaction with a low Tafel slope and less cathodic overpotential in the presence of light. Details of their synthesis, characterization, optical properties, and electrocatalytic activities are studied and reported in this letter.