The photoelectrocatalytic (PEC) technique has attracted much attention to getting clear energy and environmental purification. Simultaneous reactions of solar energy generation could be used to apply for practical applications to maximize the functionality of reactor systems. Herein, we crafted a self-driving photoelectrocatalytic reactor system, comprising platinum (Pt) modified p-Si nanowires (Pt/Si-NWs) as a photocathode and TiO₂ nanotube arrays (TiO₂–NTAs) as a photoanode for synergistic H₂ evolution and water purification, respectively. Hydrogen evolution in the cathode chamber and environmental remediation in the anode chamber were achieved with the aid of appropriate bandgap illumination and self-built bias voltage. The mismatch of Fermi levels between TiO₂–NTAs and Si-NWs reduced the recombination rates of photoinduced electrons and holes through the formation of Z scheme and inner electric filed. The synergistic PEC reactions exhibited much higher activities than those achieved using other systems so far. This basic principal could be applied for fabricating other PEC reactors in photoelectro conversion devices and be established as design guidelines for reactors to maximize the PEC performance.

中文翻译：

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一个高效的自驱动光电催化反应器，用于协同净化水和释放氢气。

光电催化（PEC）技术已引起人们的广泛关注，以获取清晰的能源和净化环境。太阳能发电的同时反应可用于实际应用，以使反应堆系统的功能最大化。在本文中，我们设计了一种自动驾驶的光电催化反应器系统，该系统包括铂（Pt）修饰的p-Si纳米线（Pt / Si-NWs）作为光阴极和TiO ₂纳米管阵列（TiO ₂ -NTA）作为用于协同H ₂的光阳极。进化和水净化。借助于适当的带隙照明和自建的偏置电压，可以实现阴极室中的氢气释放和阳极室中的环境修复。TiO ₂ -NTA与Si-NWs之间的费米能级不匹配，通过Z方案的形成和内部电场，降低了光致电子和空穴的复合率。到目前为止，协同的PEC反应显示出比使用其他系统更高的活性。该基本原理可以用于制造光电转换装置中的其他PEC反应器，并可以作为反应器的设计指南以使PEC性能最大化。