Yuan Mengyu, Luo Jing, Xu Hui, Wang Cheng, Wang Yong, Wang Yuan, Wang Xiaomei, Du Yukou
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, Jiangsu Province 213164, China.
J Colloid Interface Sci. 2022 Oct 15;624:279-286. doi: 10.1016/j.jcis.2022.05.133. Epub 2022 May 25.
The development of efficient and stable nanomaterial electrocatalysts for the hydrogen evolution reaction (HER) is of great significance for renewable energy conversion via water electrolysis. Herein, we have developed a novel class of bimetallic RuM (M = Ni, Co) hollow nanorods (HNRs) through a facile Fe etching strategy, as electrocatalysts for enhancing the HER. Morphological physical characterization and electrochemical tests demonstrated that RuM (M = Ni, Co) HNRs with hollow structures can effectively enhance electrocatalytic activity due to their high specific surface areas. Impressively, the RuNi HNRs exhibited superior HER performance with an overpotential of merely 25.6 mV in 1 M KOH solution at 10 mA cm, which is significantly lower than that of commercial Pt/C (44.7 mV). Moreover, the as prepared RuNi HNRs showed excellent stability and could continuously work at a current density of 10 mA cm for 40 h with a negligible increase in potential. The Ru-based HNRs also showed high HER activity in an acidic solution. This study paves a new way for the universal fabrication of bimetallic hollow structured nanomaterials as efficient electrocatalysts for boosting the HER.
开发用于析氢反应（HER）的高效稳定纳米材料电催化剂对于通过水电解实现可再生能源转换具有重要意义。在此，我们通过一种简便的铁蚀刻策略开发了一类新型的双金属RuM（M = Ni、Co）空心纳米棒（HNRs），作为增强HER的电催化剂。形态物理表征和电化学测试表明，具有空心结构的RuM（M = Ni、Co）HNRs因其高比表面积而能有效增强电催化活性。令人印象深刻的是，RuNi HNRs在1 M KOH溶液中，电流密度为10 mA cm时，析氢过电位仅为25.6 mV，明显低于商业Pt/C（44.7 mV）。此外，所制备的RuNi HNRs表现出优异的稳定性，能够在10 mA cm的电流密度下持续工作40 h，电位增加可忽略不计。Ru基HNRs在酸性溶液中也表现出高析氢活性。这项研究为普遍制备双金属空心结构纳米材料作为促进析氢的高效电催化剂开辟了一条新途径。
