Lin Shusen, Mandavkar Rutuja, Habib Md Ahasan, Dristy Sumiya Akter, Joni Mehedi Hasan, Jeong Jae-Hun, Lee Jihoon
Department of Electronic Engineering, College of Electronics and Information, Kwangwoon University, Nowon-gu Seoul, 01897, South Korea.
Department of Electronic Engineering, College of Electronics and Information, Kwangwoon University, Nowon-gu Seoul, 01897, South Korea.
J Colloid Interface Sci. 2025 Jan;677(Pt A):587-598. doi: 10.1016/j.jcis.2024.08.009. Epub 2024 Aug 3.
Electrochemical water splitting has been considered as a key pathway to generate environmentally friendly green hydrogen energy and it is essential to design highly efficient electrocatalysts at affordable cost to facilitate the redox reactions of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In this work, a novel micro-clustered Ru/CuMnBP electrocatalyst is introduced, prepared via hydrothermal deposition and soaking-assisted Ru doping approaches on Ni foam substrate. Ru/CuMnBP micro-clusters exhibit relatively low HER/OER turnover overpotentials of 11 mV and 85 mV at 10 mA/cm in 1 M KOH. It also demonstrates a low 2-E turnover cell voltage of 1.53 V at 10 mA/cm for the overall water-splitting, which is comparable with the benchmark electrodes of Pt/C||RuO. At a super high-current density of 2000 mA/cm, the dual functional Ru/CuMnBP demonstrates an exceptionally low 2-E cell voltage of 3.13 V and also exhibits superior stability for over 10 h in 1 M KOH. Excellent electrochemical performances originate from the large electrochemical active surface area with the micro cluster morphology, high intrinsic activity of CuMnBP micro-clusters optimized through component ratio adjustment and the beneficial Ru doping effect, which enhances active site density, conductivity and stability. The usage of Ru in small quantities via the simple soaking doping approach significantly improves electrochemical reaction rates for both HER and OER, making Ru/CuMnBP micro-clusters promising candidates for advanced electrocatalytic applications.
电化学水分解被认为是产生环境友好型绿色氢能的关键途径，以可承受的成本设计高效的电催化剂以促进析氢反应（HER）和析氧反应（OER）的氧化还原反应至关重要。在这项工作中，引入了一种新型的微簇状Ru/CuMnBP电催化剂，通过水热沉积和浸泡辅助Ru掺杂方法在泡沫镍基底上制备。Ru/CuMnBP微簇在1 M KOH中，在10 mA/cm²时表现出相对较低的HER/OER转换过电位，分别为11 mV和85 mV。在10 mA/cm²的电流密度下，其整体水分解的2-E转换电池电压低至1.53 V，与Pt/C||RuO基准电极相当。在2000 mA/cm²的超高电流密度下，双功能Ru/CuMnBP表现出异常低的2-E电池电压3.13 V，并且在1 M KOH中超过10小时表现出优异的稳定性。优异的电化学性能源于具有微簇形态的大电化学活性表面积、通过成分比调整优化的CuMnBP微簇的高本征活性以及有益的Ru掺杂效应，这提高了活性位点密度、导电性和稳定性。通过简单的浸泡掺杂方法少量使用Ru显著提高了HER和OER的电化学反应速率，使Ru/CuMnBP微簇成为先进电催化应用的有前途的候选材料。
