可視光駆動型燃料電池における高性能プラズモン増強電極触媒酸化の開発

氢气（H2）是一种零碳排放的燃料，预计将成为未来理想的能源。虽然可以在太阳光照射下使用半导体光催化剂通过直接分解水来生产H2，但是目前的能量转换效率太低，该技术在经济上是不合理的。主要障碍是快速电荷复合以及在可见光和近红外（NIR）区域中没有传统半导体（如TiO 2）的吸收。最近，二维黑磷（BP）引起了人们极大的兴趣，因为它具有可调节的带隙，从体的约0.3eV到单层的约2.1eV。由于从UV到NIR的宽太阳光吸收，上述带隙性质是有希望的。在此，设计了几种BP基光催化体系，并将其用于可见光和近红外光催化制氢。1）首次合成了BP敏化的Au/LTO三元纳米结构，并将其作为一种高效稳定的可见光和近红外光催化剂用于制氢。2）首次合成了BP纳米片和C3 N4纳米片组成的二元纳米杂化物（BP/CN），并将其作为一种金属催化剂用于制氢。3）2D BP纳米片可以作为广谱光催化剂，其可以利用可见光和NIR光进行光催化H2释放。4）通过使用BP和WS 2，我们开发了一种无贵金属的光催化H2生产系统，其响应于宽光谱的太阳光，特别是在NIR区域。

Hydrogen (H2) is a zero carbon emission fuel, and is forecast to be an ideal source of energy in the future. Although H2 can be produced from direct splitting of water using semiconductor photocatalysts under solar light irradiation, the present energy conversion efficiency is too low for the technology to be economically sound. The main barriers are the rapid charge recombination as well as no absorption of traditional semiconductors such as TiO2 in the visible and near-infrared (NIR) regions. Recently, two dimensional (2D) black phosphorus (BP) has attracted great interest, because it has adjustable bandgap from ~0.3 eV for bulk to ~2.1 eV for monolayer. The above bandgap properties are promising because of broad solar light absorption from UV to NIR. Herein, several BP-based systems were designed and used for efficient photocatalytic H2 production under visible and NIR light irradiation.1) Ternary BP sensitized Au/LTO nanostructure was synthesized firstly and used as an efficient and stable visible- and NIR-light-driven photocatalyst for H2 production.2) Binary nanohybrid (BP/CN) composed of BP nanoflake and C3N4 nanosheet was facilely obtained and firstly used as a metal-free photocatalyst for H2 evolution in the presence of methanol as a hole quencher.3) 2D BP nanoflakes can be worked as a broad spectrum photocatalyst, which can harness visible and NIR light for photocatalytic H2 evolution.4) By using BP and WS2, we developed a noble metal-free photocatalytic H2 production system that responds to a wide spectrum of solar light, particularly in the NIR region.