Shi Lijuan, Wu Xueyan, Zhao Kenan, Guo Xinyu, Zhang Xiuli, Lv Yan, Guo Jixi
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, PR China.
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, PR China.
J Colloid Interface Sci. 2025 Feb;679(Pt A):100-108. doi: 10.1016/j.jcis.2024.09.236. Epub 2024 Sep 30.
Developing low-cost catalysts with high activity for the Hydrogen Evolution Reaction (HER) is a main challenge to reduce the dependence on precious metals while maintaining the catalytic activity. In this study, nickel-plated multi-walled carbon nanotubes (Ni-MWCNTs) with a large number of active sites were selected, and Ni-MWCNTs electrocatalysts loaded with trace amounts of RuO nanoparticles were prepared by annealing treatment, which exhibited excellent HER performances in both acidic and alkaline media. The RuO nanoparticles loaded nickel-coated multi-walled carbon nanotubes (RuO@Ni-MWCNTs) had a small electrochemical impedance spectrum (EIS) and a large electrochemically active surface area (ECSA). Notably, RuO@Ni-MWCNTs with less than 1 % Ru content exhibited excellent catalytic activities in both acidic and alkaline solutions. The results showed that the overpotentials of RuO@Ni-MWCNTs were 20.2 mV (alkaline) and 73.7 mV (acidic), respectively. After stabilization at 20 mA cm for 90 h, the evaluation results showed that RuO@Ni-MWCNTs could maintain their catalytic efficiency without significant degradation.
开发具有高活性的析氢反应（HER）低成本催化剂是在保持催化活性的同时减少对贵金属依赖的主要挑战。在本研究中，选择了具有大量活性位点的镀镍多壁碳纳米管（Ni-MWCNTs），并通过退火处理制备了负载微量RuO纳米颗粒的Ni-MWCNTs电催化剂，其在酸性和碱性介质中均表现出优异的HER性能。负载RuO纳米颗粒的镀镍多壁碳纳米管（RuO@Ni-MWCNTs）具有较小的电化学阻抗谱（EIS）和较大的电化学活性表面积（ECSA）。值得注意的是，Ru含量低于1%的RuO@Ni-MWCNTs在酸性和碱性溶液中均表现出优异的催化活性。结果表明，RuO@Ni-MWCNTs的过电位分别为20.2 mV（碱性）和73.7 mV（酸性）。在20 mA cm下稳定90 h后，评估结果表明RuO@Ni-MWCNTs可以保持其催化效率而无明显降解。
