This study is the first to use a newly-developed material via hydrothermal method, cerium oxide nanowires doped with reduced graphene oxide (CNW-RGO) for reductive H₂ production. The detailed characteristics of the CNW-RGO materials were investigated to explore the capabilities of reductive production. The mean diameter of the CNWs was uniform at 22 nm. Owing to RGO-doping, the energy gap between the valence and conduction bands tended to become narrower that demonstrated by the density functional theory calculation (DFT). Furthermore, the optimum hydrogen production was 7.14 mmol g⁻¹ by the CNW-RGO with a RGO content of 4 wt.% under the visible-light irradiation. This result was consistent with the turnover frequency (TOF) predictions. The introduction of RGO sheets effectively mediated the transfer of photogenerated electrons from the CNW to the sheets. Therefore, it could act as an electron trap to stimulate charge separation, which was corroborated by X-ray photoelectron spectroscopy (XPS) analysis. As indicated by comparative assessment, methanol was the most promising sacrificial agent in the system. Additionally, the formation of the methoxy group after the reaction was clearly demonstrated by Fourier-transform infrared (FTIR) spectroscopy. The number of hydroxyl groups on the alcohols directly determined their activity in reductive production.

这项研究是第一个通过水热法使用新开发的材料，掺杂有还原氧化石墨烯的氧化铈纳米线（CNW-RGO）来还原H _2的生产。研究了CNW-RGO材料的详细特性，以探索还原生产的能力。CNW的平均直径在22nm处是均匀的。由于RGO掺杂，价带和导带之间的能隙趋于变窄，这由密度泛函理论计算（DFT）证明。此外，最佳产氢量为7.14 mmol g ^-1由CNW-RGO在可见光照射下的RGO含量为4重量％。此结果与周转频率（TOF）的预测一致。RGO薄片的引入有效地介导了光生电子从CNW到薄片的转移。因此，它可以充当电子陷阱以刺激电荷分离，这已通过X射线光电子能谱（XPS）分析得到证实。如比较评估所示，甲醇是系统中最有希望的牺牲剂。另外，通过傅里叶变换红外（FTIR）光谱清楚地证明了反应后甲氧基的形成。醇上羟基的数目直接决定了它们在还原生产中的活性。