Jin Mengyuan, Han Xiang, Chou Ting, Li Shuangyan, Pi Yecan, Chen Kai, Chen Tingting, Wang Shun, Yang Yun, Wang Juan, Jin Huile
Wenzhou Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang 325035, China.
J Colloid Interface Sci. 2025 Jan 15;678(Pt A):272-280. doi: 10.1016/j.jcis.2024.08.199. Epub 2024 Aug 24.
Developing highly efficient electrocatalyst with heterostructure for hydrogen evolution and oxidation reactions (HER/HOR) in alkaline media is crucial to the fabrication and conversion of hydrogen energy but also remains a great challenge. Herein, the synthesis of ruthenium-nickel nanoparticles (Ru-Ni NPs) with heterostructure for hydrogen electrocatalysis is reported, and studies show that their catalytic activity is improved by electron redistribution caused by the distinctly heterogeneous interface. Impressively, Ru-Ni NPs possess the remarkable exchange current density (2.22 mA cm) for HOR. Additionally, an ultra-low overpotential of 28 mV is required to attain a current density of 10 mA cm and superior stability of 200 h for HER. The highly efficient catalytic activity can be attributed to the electron transfer from Ni to Ru and the optimal adsorption of H* on Ru-Ni sites. Our study showcases a reliable heterostructure that boosts the HOR/HER activity of the catalyst in alkaline environments. This work provides a new pathway for designing high-performance electrocatalyst for energy storage and conversion.
开发用于碱性介质中析氢和氧化反应（HER/HOR）的具有异质结构的高效电催化剂对于氢能的制备和转化至关重要，但仍然是一个巨大的挑战。在此，报道了用于氢电催化的具有异质结构的钌-镍纳米颗粒（Ru-Ni NPs）的合成，研究表明，由明显的异质界面引起的电子重新分布提高了它们的催化活性。令人印象深刻的是，Ru-Ni NPs对于HOR具有显著的交换电流密度（2.22 mA cm）。此外，对于HER，达到10 mA cm的电流密度需要28 mV的超低过电位以及200 h的优异稳定性。高效的催化活性可归因于从Ni到Ru的电子转移以及H*在Ru-Ni位点上的最佳吸附。我们的研究展示了一种可靠的异质结构，其可提高催化剂在碱性环境中的HOR/HER活性。这项工作为设计用于能量存储和转化的高性能电催化剂提供了一条新途径。
