School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
J Colloid Interface Sci. 2023 Sep;645:227-240. doi: 10.1016/j.jcis.2023.04.143. Epub 2023 May 2.
The mild and rapid construction of economical, efficient and ultrastable electrodes for hydrogen production via water splitting at industrial-grade current density remains extremely challenging. Herein, a one-step mild electroless plating method is proposed to deposit cobalt phosphorus (CoP)-based species on robust nickel net (NN, denoted as Co-P@NN). The tight interfacial contact, corrosion-proof self-supporting substrate and synergistic effect of Co-P@Co-O contribute greatly to the rapid electron transport, high intrinsic activity and long-term durability in the alkaline simulated seawater (1.0 M KOH + 0.5 M NaCl). Attractively, Co-P@Co-O also achieves ultrastable catalysis for over 2880 h with negligible activity attenuation under various alkaline extreme conditions (simulated seawater, high-salt environment, domestic sewage and so on). Furthermore, this work successfully constructs a series of ternary elemental doped (Ni, S, B, Fe and so on) CoP-based catalytic electrodes for highly efficient overall seawater splitting (OSWS). This work demonstrates not only an ideal platform for the versatile strategy of mildly obtaining CoP-based electrocatalysts but also the pioneering philosophy of large-scale hydrogen production.
温和且快速地构建用于工业电流密度下水分解制氢的经济、高效和超稳定电极仍然极具挑战性。在此，提出了一种一步温和化学镀方法，在坚固的镍网上沉积基于钴磷（CoP）的物种（表示为 Co-P@NN）。紧密的界面接触、防腐蚀的自支撑基底以及 Co-P@Co-O 的协同效应极大地促进了在碱性模拟海水中（1.0 M KOH+0.5 M NaCl）的快速电子传输、高本征活性和长期稳定性。引人注目的是，Co-P@Co-O 还在各种碱性极端条件（模拟海水、高盐环境、生活污水等）下实现了超过 2880 小时的超稳定催化，活性衰减可忽略不计。此外，这项工作成功构建了一系列用于高效全海水分解（OSWS）的三元元素掺杂（Ni、S、B、Fe 等）CoP 基催化电极。这项工作不仅展示了一种获得基于 CoP 的电催化剂的通用策略的理想平台，而且还开创了大规模制氢的理念。
