Production of small molecule alcohol via photoelectrochemical (PEC) conversion of carbon dioxide (CO₂) is one of the most prominent way to reduce the atmospheric CO₂ into emission freeway. In this work, a gold nanoparticle incorporated titanium dioxide nanotubes (Au@TNT) were used as a photoanode along with platinum cathode for the photoelectrochemical conversion of CO₂ into methanol and ethanol with high product yield rate of 5.1 and 1.4 mM, respectively, for 2 h under AM 1.5 G illumination at the applied potential of +1 V vs. Ag/AgCl. The Au@TNTs were prepared by facile one step electrodeposition method, the introduction of Au nanoparticles on the TNT surface improve the conductivity, charge separation efficiency, improved the interfacial charge transfer process thereby reduced the recombination rate. The charge transfer mechanism in Au@TNT and the possible reaction at the electrode surface were investigated in detail.

通过光电化学 (PEC) 转化二氧化碳 (CO ₂ )生产小分子醇是减少大气 CO ₂进入排放高速公路的最突出方式之一。在这项工作中，金纳米颗粒结合二氧化钛纳米管（Au@TNT）被用作光阳极和铂阴极，用于将 CO ₂光电化学转化为甲醇和乙醇，产品产率分别为 5.1 和 1.4 mM。 2 小时在 AM 1.5 G 照明下 +1 V vs. 银/氯化银。Au@TNTs采用简便的一步电沉积法制备，在TNT表面引入Au纳米颗粒提高了电导率和电荷分离效率，改善了界面电荷转移过程，从而降低了复合率。详细研究了 Au@TNT 中的电荷转移机制和电极表面可能发生的反应。