Xu Na, Lv Jing-Yi, Sun Hai-Yi, Tian Xin-Jie, Yu Wen-Li, Li Xin, Liu Chun-Ying, Chai Yong-Ming, Dong Bin
State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China.
School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, PR China.
J Colloid Interface Sci. 2024 Jun 15;664:704-715. doi: 10.1016/j.jcis.2024.02.195. Epub 2024 Feb 29.
The rational design and optimization of heterogeneous interface for low loading noble metal HER eletrocatalysts to facilitate the upscaling of alkaline water/seawater electrolysis is highly challenging. Herein, we present a facile deep corrosion strategy induced by NaBH to precisely construct an ultrasmall Ru nanoparticle-decorated Ni/NiO hybrid (r-Ru-Ni/NiO) with highly dispersed triple-phase heterostructures. Remarkably, it exhibits superior activity with only 53 mV and 70 mV at 100 mA cm for hydrogen evolution reaction (HER) in alkaline water and seawater, respectively, surpassing the performance of Pt/C (109.7 mV, 100 mA cm, 1 M KOH). It is attributed to collaborative optimization of electroactive interfaces between well-distributed ultrasmall Ru nanoparticles and Ni/NiO hybrid. Moreover, the assembled r-Ru-Ni/NiO system just require 2.03 V at 1000 mA cm in anion exchange membrane (AEM) electrolyzer, outperforming a RuO/NF || Pt/C system, while exhibiting outstanding stability at high current densities. This study offers a logical design for accurate construction of interfacial engineering, showing promise for large-scale hydrogen production via electrochemical water splitting.
合理设计和优化用于低负载贵金属析氢电催化剂的异质界面，以促进碱性水/海水电解的规模化应用极具挑战性。在此，我们提出一种由硼氢化钠诱导的简便深度腐蚀策略，以精确构建具有高度分散三相异质结构的超小钌纳米颗粒修饰的镍/氧化镍复合材料（r-Ru-Ni/NiO）。值得注意的是，在碱性水和海水中，其在100 mA cm²的析氢反应（HER）中分别仅需53 mV和70 mV的过电位，超过了Pt/C（109.7 mV，100 mA cm²，1 M KOH）的性能。这归因于分布均匀的超小钌纳米颗粒与镍/氧化镍复合材料之间电活性界面的协同优化。此外，组装的r-Ru-Ni/NiO系统在阴离子交换膜（AEM）电解槽中，在1000 mA cm²时仅需2.03 V，优于RuO₂/NF || Pt/C系统，同时在高电流密度下表现出出色的稳定性。本研究为精确构建界面工程提供了合理设计，为通过电化学水分解大规模制氢展现出了前景。
