Recent evidences have shown catalyst structure sensitivity of electrocatalytic hydrogenation (ECH) of organic molecules in aqueous phase. In this study, ECH of glucose and xylose was investigated using gold nanoparticles (AuNPs) on activated carbon fiber (CF) support as catalyst. CF supported AuNPs catalysts (CF/AuNPs) were synthesized by deposition-precipitation method and were characterized by physicochemical (SEM, TEM, XRD, N₂ physisorption, ICP-OES) and electrochemical methods. Chemical or thermal pre-treatment of CF prior to Au deposition resulted in different AuNPs size distributions. The activity towards glucose or xylose ECH were observed to be dependent on the particle size of AuNPs and the applied potential. Compared to a polycrystalline Au catalyst, higher reaction rates for glucose and xylose ECH were observed for a CF/AuNPs catalyst with a higher surface area. This indicates that the activity of Au towards glucose and xylose ECH is dependent on the surface area and particle size, and particle size control can be achieved by simple chemical or thermal pretreatment of the catalyst support.

最近的证据表明水相中有机分子的电催化氢化 (ECH) 的催化剂结构敏感性。在这项研究中，使用活性碳纤维 (CF) 载体上的金纳米粒子 (AuNP) 作为催化剂，研究了葡萄糖和木糖的 ECH。采用沉积-沉淀法合成CF负载AuNPs催化剂（CF/AuNPs），并通过物理化学（SEM、TEM、XRD、N ₂物理吸附，ICP-OES）和电化学方法。在 Au 沉积之前对 CF 进行化学或热预处理导致不同的 AuNPs 尺寸分布。观察到对葡萄糖或木糖 ECH 的活性取决于 AuNP 的粒径和施加的电位。与多晶金催化剂相比，对于具有更高表面积的 CF/AuNPs 催化剂，观察到葡萄糖和木糖 ECH 的反应速率更高。这表明Au对葡萄糖和木糖ECH的活性取决于表面积和粒径，并且可以通过催化剂载体的简单化学或热预处理来实现粒径控制。