Efficient Hydrogen Production by a Photoredox Cascade Catalyst Comprising Dual Photosensitizers and a Transparent Electron Mediator
Efficient Hydrogen Production by a Photoredox Cascade Catalyst Comprising Dual Photosensitizers and a Transparent Electron Mediator
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DOI：
10.1021/jacs.2c13687
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发表时间：
2023-03
影响因子：
15
通讯作者：
Nobutaka Yoshimura;Masaki Yoshida;A. Kobayashi
中科院分区：
文献类型：
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作者：
Nobutaka Yoshimura;Masaki Yoshida;A. Kobayashi
光催化剂与氧化还原介质之间的单向电子传输对于实现高活性的Z型分解水光催化至关重要。在此，一种人工模拟自然光合作用中电子传输链的光氧化还原级联催化剂由Pt - TiO₂纳米颗粒催化剂、两种光敏剂（RuCP6和RuP6）以及一种可见光透明的电子介质（HCRu）合成。在存在氧化还原可逆电子供体[Co(bpy)₃]²⁺（bpy = 2,2′ - 联吡啶）的情况下进行光催化析氢时，HCRu - Zr - RuCP6 - Zr - RuP6@Pt - TiO₂（PRCC - 1）光催化剂展现出了迄今为止染料敏化TiO₂光催化剂所报道的最高初始（1小时）表观量子产率（iAQY = 2.23%）。此外，当使用对苯二酚单磺酸盐（H₂QS⁻）作为氢源时，PRCC - 1成功地产生了氢气。
One-directional electron transport between a photocatalyst and redox mediator is crucial for achieving highly active Z-scheme water-splitting photocatalysis. Herein, a photoredox cascade catalyst that artificially mimics the electron transport chain in natural photosynthesis was synthesized from a Pt-TiO2 nanoparticle catalyst, two photosensitizers (RuCP6 and RuP6), and a visible-light-transparent electron mediator (HCRu). During photocatalytic hydrogen evolution in the presence of a redox-reversible electron donor, [Co(bpy)3]2+ (bpy = 2,2′-bipyridine), the HCRu-Zr-RuCP6-Zr-RuP6@Pt-TiO2 (PRCC-1) photocatalyst exhibited the highest reported initial (1 h) apparent quantum yield (iAQY = 2.23%) of dye-sensitized TiO2 photocatalysts to date. Furthermore, PRCC-1 successfully produced hydrogen when using hydroquinone monosulfonate (H2QS–) as the hydrogen source.