Key Laboratory of Mesoscopic Chemistry of MOE, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
School of Environmental & Chemical Engineering, Jiangsu University of Science and Technology, Jiangsu 212003, China.
Molecules. 2023 Jan 21;28(3):1100. doi: 10.3390/molecules28031100.
Electrochemical hydrogen evolution is a highly efficient way to produce hydrogen, but since it is limited by high-cost electrocatalysts, the preparation of high-efficiency electrocatalysts with fewer or free noble metals is important. Here, TaN nanobelt (NB)-loaded Ru nanoparticle (NP) hybrids with various ratios, including 1~10 wt% Ru/TaN, are constructed to electrocatalyze water splitting for a hydrogen evolution reaction (HER) in alkaline media. The results show that 5 wt% Ru/TaN NBs have good HER properties with an overpotential of 64.6 mV, a Tafel slope of 84.92 mV/dec at 10 mA/cm in 1 M of KOH solution, and good stability. The overpotential of the HER is lower than that of Pt/C (20 wt%) at current densities of 26.3 mA/cm or more. The morphologies and structures of the materials are characterized by scanning electron microscopy and high-resolution transmission electron microscopy, respectively. X-ray photoelectron energy spectroscopy (XPS) demonstrates that a good HER performance is generated by the synergistic effect and electronic transfer of Ru to TaN. Our electrochemical analyses and theoretical calculations indicate that Ru/TaN interfaces play an important role as real active sites.
电化学析氢是一种高效产氢的方法，但由于其受到高成本电催化剂的限制，因此制备高效、低或无贵金属的电催化剂非常重要。在这里，构建了具有不同负载比的 TaN 纳米带（NB）负载 Ru 纳米颗粒（NP）的复合材料，包括 1~10wt%Ru/TaN，用于在碱性介质中电催化水分解析氢反应（HER）。结果表明，5wt%Ru/TaN NB 具有良好的 HER 性能，在 1M 的 KOH 溶液中，其过电势为 64.6mV，Tafel 斜率为 84.92mV/dec，在 10mA/cm2时具有良好的稳定性。在电流密度为 26.3mA/cm 或更高时，HER 的过电势低于 Pt/C（20wt%）。通过扫描电子显微镜和高分辨率透射电子显微镜分别对材料的形貌和结构进行了表征。X 射线光电子能谱（XPS）表明，Ru 向 TaN 的协同效应和电子转移产生了良好的 HER 性能。我们的电化学分析和理论计算表明，Ru/TaN 界面作为实际活性位点发挥了重要作用。
