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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Electrochemically reduced graphene oxide on silicon nanowire arrays for enhanced photoelectrochemical hydrogen evolution
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Electrochemically reduced graphene oxide on silicon nanowire arrays for enhanced photoelectrochemical hydrogen evolution

机译：硅纳米线阵列上的电化学还原氧化石墨烯，可增强光电化学氢的释放

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摘要

Photoelectrochemical (PEC) water splitting into hydrogen and oxygen by sunlight is a promising approach to solve energy and environmental problems. In this work, silicon nanowire arrays (SiNWs) photocathodes decorated with reduced graphene oxide (rGO) for PEC water splitting were successfully prepared by a flexible and scalable electrochemical reduction method. The SiNWs photocathode with the optimized rGO decoration (SiNWs/rGO20) shows an enhanced activity with a much higher photocurrent density and significantly positive shift of onset potential compared to the bare SiNWs arrays for the hydrogen evolution reaction (HER). The enhanced PEC activity is ascribed to the high electrical conductivity of rGO and improved separation of the photogenerated charge carriers. This work not only demonstrates a facile, rapid and tunable electrochemical reduction method to produce rGO, but also exhibits an efficient protocol to enhance the PEC water splitting of silicon-based materials.
机译：光化学（PEC）水被阳光分解为氢和氧是解决能源和环境问题的有前途的方法。在这项工作中，通过灵活且可扩展的电化学还原方法成功地制备了用还原氧化石墨烯（rGO）装饰的PEC水分解用硅纳米线阵列（SiNWs）光电阴极。与用于氢气析出反应（HER）的裸SiNWs阵列相比，具有优化rGO装饰（SiNWs / rGO20）的SiNWs光电阴极显示出更高的活性，具有更高的光电流密度和显着的正起始电位偏移。增强的PEC活性归因于rGO的高电导率和光生载流子的改进分离。这项工作不仅证明了一种生产rGO的简便，快速和可调​​的电化学还原方法，而且还展示了一种有效的方案来增强硅基材料的PEC水分解。

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