电解
海水
阳极
材料科学
腐蚀
阴极
化学工程
磷酸盐
催化作用
电解水
无机化学
电极
冶金
化学
电解质
有机化学
地质学
工程类
物理化学
海洋学
作者
Shiwei Song,Yanhui Wang,Xueqing Tian,Fanjia Sun,Xiaoxu Liu,Yungang Yuan,Wei Li,Jianbing Zang
标识
DOI:10.1016/j.jcis.2022.11.113
摘要
For sustained hydrogen generation from seawater electrolysis, an efficient and specialized catalyst must be designed to cope with the slow anode reaction and chloride ions (Cl-) corrosion. In this work, an S-modified NiFe-phosphate with hierarchical and hollow microspheres was grown on the NiFe foam skeleton (S-NiFe-Pi/NFF), acting as a bifunctional catalyst to enable industrial-scale seawater electrolysis. The introduction of S distorted the lattice of NiFe-phosphate and regulated the local electronic environment around Ni/Fe active metal, both of which enhanced the electrocatalytic activity. Additionally, the existence of phosphate groups repelled Cl- on the surface and enhanced corrosion resistance, enabling stable long-term operation in seawater. The double-electrode electrolyzer composed of the hollow-structured S-NiFe-Pi/NFF as both cathode and anode exhibited a potential of 1.68 V at 100 mA cm-2 for seawater electrolysis. Particularly, to achieve industrial requirements of 500 mA cm-2, it only required a low cell voltage of 1.8 V and demonstrated a consistent response over 100 h, which outperformed the pair of Pt/C || IrO2. This study provides a feasible idea for the preparation of electrocatalysts that are with both highly activity and corrosion resistance, which is crucial for the implementation of industrial-scale seawater electrolysis.
科研通智能强力驱动
Strongly Powered by AbleSci AI