Recently, the increase in the CO₂ content in the Earth's atmosphere causes global warming and the rapid consumption of fossil fuel resources such as coal and oil. Therefore, effort is required to create clean and sustainable energy resources to address these environmental issues. In this context, hydrogen evolution from water splitting-based photoelectrochemical technologies plays a significant role as a zero CO₂ emission fuel. Here, we design and prepare carbon-doped SnO₂ nanostructures by a simple single-step thermal decomposition method and coated on a MoS₂/p-Si substrate for hydrogen evolution by photoelectrochemical water splitting. The C-doped SnO₂/MoS₂/p-Si shows enhanced activity in the hydrogen evolution reaction, with an onset potential of −0.17 V at 2.73 mA/cm², and high stability for over 45 hours. In addition, the doping of carbon influences the shape of the nanostructures, inducing their transformation from cubical rods to polyhedral structures. This study provides a promising method for the fabrication of heterogeneous photoelectrocatalysts for overall water splitting.

中文翻译：

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用于可见光驱动光电化学析氢反应的 C 掺杂 SnO2 纳米结构/MoS2/p-Si 电极

最近，地球大气中CO ₂含量的增加导致全球变暖以及煤和石油等化石燃料资源的快速消耗。因此，需要努力创造清洁和可持续的能源来解决这些环境问题。在此背景下，基于水分解的光电化学技术产生的氢气作为零 CO ₂排放燃料发挥着重要作用。在这里，我们通过简单的单步热分解方法设计和制备碳掺杂的 SnO ₂纳米结构，并涂覆在 MoS ₂ /p-Si 衬底上，通过光电化学水分解析氢。C掺杂的SnO ₂ /MoS ₂/p-Si 在析氢反应中显示出增强的活性，在 2.73 mA/cm ^{2 下}具有 -0.17 V 的起始电位，并且具有超过 45 小时的高稳定性。此外，碳的掺杂影响纳米结构的形状，诱导它们从立方棒转变为多面体结构。该研究为制备用于整体水分解的多相光电催化剂提供了一种有前景的方法。