Zhang Wen, Gao Jianyang, Gong Qinzhen, Liu Fusheng, Zhang Yang, Xu Guang-Rui, Wu Zexing, Wang Lei
Key Laboratory of Eco-chemical Engineering, Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life Science, Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology, College of Environment and Safety Engineering, School of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
Small. 2024 Dec;20(49):e2404858. doi: 10.1002/smll.202404858. Epub 2024 Sep 16.
Seawater electrolysis is the most promising technology for hydrogen production, in which surface reconstruction on the interface of electrode/electrolyte plays a crucial role in activating the catalytic reactions with a low activation energy barrier. Herein, an efficient Mo modifying NiCoMo prickly flower clusters electrocatalyst supported on nickel foam (Mo-doped Ni/Co-OOH prickly flower clusters) is obtained, which serves as an eminently active and durable catalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) due to the surface reconstruction during the alkaline seawater electrolysis with ultralow overpotentials. It just requires a cell voltage of 1.52 V to achieve the current density of 10 mA cm for water electrolysis along with robust durability over 30 h. Mo doping effectively regulates the surface reconstruction of Ni/Co-OOH, which facilitates the adsorption of oxygen-containing intermediates on the active center, and the nonhomogeneous interface induces charge rearrangement for the catalytic process to improve efficiency, providing a new strategy for revealing the seawater electrolytic mechanism.
海水电解是最具前景的制氢技术，其中电极/电解质界面的表面重构对于激活具有低活化能垒的催化反应起着关键作用。在此，制备了一种负载在泡沫镍上的高效钼修饰镍钴钼刺花簇电催化剂（钼掺杂的Ni/Co-OOH刺花簇），由于在碱性海水电解过程中具有超低过电位的表面重构，该催化剂对析氢反应（HER）和析氧反应（OER）均具有极高的活性和耐久性。对于水电解，仅需1.52 V的电池电压即可实现10 mA cm的电流密度，并且具有超过30小时的稳健耐久性。钼掺杂有效地调节了Ni/Co-OOH的表面重构，这有利于含氧中间体在活性中心上的吸附，并且非均匀界面诱导催化过程中的电荷重排以提高效率，为揭示海水电解机理提供了新策略。
