海水
电解
析氧
阳极
分解水
氯
腐蚀
无机化学
化学
化学工程
电解水
热液循环
氯化物
钼
材料科学
催化作用
电解质
电化学
电极
物理化学
地质学
有机化学
海洋学
光催化
工程类
作者
Wen Sheng Ou,Wenbiao Zhang,Haoran Qin,Weijia Zhou,Yi Tang,Qingsheng Gao
标识
DOI:10.1016/j.jcis.2023.11.054
摘要
Designing highly active electrocatalysts that can resist chloride ion (Cl-) corrosion during seawater electrolysis is still a challenge. Here, Mo-doping is introduced to synchronously improve the electrocatalytic activity and anti-chlorine corrosion of Ni3S2 toward the efficient overall seawater splitting. With commercial nickel-molybdenum foam (NMF) as the reactive substrates, Mo-doped Ni3S2 columnar arrays (Mo-Ni3S2/NMF) are fabricated via a one-step hydrothermal process, which expose abundant active sites with the ameliorated surface electronic configurations toward the enhanced binding with *OH (* denotes an active site) but the weakened one with *Cl. As expected, they afford the excellent bi-functionality for both oxygen and hydrogen evolution reactions (OER and HER), with the remarkably improved anti-corrosion to Cl- at anode as compared to pristine Ni3S2. In alkaline mimic seawater (1.0 M NaOH + 0.5 M NaCl), Mo-Ni3S2/NMF requires 330 mV (for OER) and 209 mV (for HER) overpotentials at the current density of ±100 mA cm-2, and a low cell voltage of 1.52 V at 10 mA cm-2 for overall seawater splitting. This work highlights a feasible strategy to explore highly active and stable electrocatalysts for sustainable H2 production.
科研通智能强力驱动
Strongly Powered by AbleSci AI