Li Yanqiu, Yu Jing, Liu Qi, Liu Jingyuan, Chen Rongrong, Zhu Jiahui, Xu Cheng-Yan, Wang Jun
Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China.
Nanhai Institute of Harbin Engineering University, Sanya, 572024, China.
Small Methods. 2025 Jun 26:e2501076. doi: 10.1002/smtd.202501076.
Platinum (Pt)-based materials are considered as the most efficient electrocatalysts for the hydrogen evolution reaction (HER), however, reducing the Pt dosage while maintaining a high catalytic efficiency remains a great challenge. In this study, an advanced HER electrocatalyst is designed based on ultrafine 2.64 nm platinum-ruthenium (PtRu) alloy nanoparticles anchored on porous carbon nanofibers (PCNFs). The experimental and theoretical calculation results show that the synergistic effect between Pt and Ru can not only promote the high dispersion of alloy nanoparticles on PCNFs in the microstructure but also regulate the coordination environment of Pt and Ru in the electronic environment. These combined effects enhance water adsorption, reduce the energy barrier of hydrolysis, and provide a suitable d-band center for the HER. Consequently, the prepared PtRu/PCNF electrocatalyst exhibits excellent catalytic activity with low Pt and Ru loadings in alkaline and alkaline seawater. The overpotentials at 10 mA cm are 23.1 and 19.5 mV, respectively, with Tafel slopes of 23.5 and 20.7 dec, outperforming commercial Pt/C (20 wt%). This study presents a new type of electrocatalyst for hydrogen production via water and seawater electrolysis.
基于铂（Pt）的材料被认为是析氢反应（HER）中最有效的电催化剂，然而，在保持高催化效率的同时降低铂用量仍然是一个巨大的挑战。在本研究中，基于锚定在多孔碳纳米纤维（PCNFs）上的2.64纳米超细铂钌（PtRu）合金纳米颗粒设计了一种先进的HER电催化剂。实验和理论计算结果表明，Pt和Ru之间的协同效应不仅可以促进合金纳米颗粒在微观结构上在PCNFs上的高度分散，还可以在电子环境中调节Pt和Ru的配位环境。这些综合效应增强了水的吸附，降低了水解的能垒，并为HER提供了合适的d带中心。因此，制备的PtRu/PCNF电催化剂在碱性和碱性海水中以低Pt和Ru负载量表现出优异的催化活性。在10 mA cm时的过电位分别为23.1和19.5 mV，塔菲尔斜率分别为23.5和20.7 dec，优于商业Pt/C（20 wt%）。本研究提出了一种通过水电解和海水电解制氢的新型电催化剂。
