近日，陕西理工大学Xiangyu Zou及合作研究组发现，Fe调控Ni₃S₂/ZrCoFe-LDH@NF异质结催化剂的整体水裂解。相关论文于2023年12月14日发表在《结构化学》杂志上。

随着传统能源的不断枯竭，发展可持续能源已成为当今世界的重要任务之一。在该研究中，研究人员采用两步法在泡沫镍上原位合成了Ni₃S₂/ZrCoFe-LDH@NF异质结构电催化剂。研究人员采用X射线衍射仪、扫描电镜、透射电镜和X射线电子能谱对Ni₃S₂/ZrCoFe-LDH@NF异质结构进行表征，并在1 mol·L^-1 KOH电解质中测试了该电催化剂的HER、OER和总水解性能。

结果表明，Ni₃S₂/ZrCoFe-LDH@NF为层状叠合异质结构，在OER反应中，过电位为330 mV，电流密度为100 mA·cm^-2时，Tafel斜率为90.9 mV·dec^-1，在HER反应中，电流密度为10 mA·cm^-2时，过电位为159.2 mV。在100 h的全水解稳定性试验中，该催化剂的Tafel斜率为96 mV·dec^-1，且表现出良好的结构稳定性。该异质结构电催化剂的成功构建为后续异质结，及其在电催化中的应用提供了良好的思路和研究基础。

附：英文原文

Title: Fe regulates Ni3S2/ZrCoFe-LDH@NF heterojunction catalysts for overall water splitting

Author: anonymous

Issue&Volume: 2023-12-14

Abstract: With the continuous depletion of traditional energy sources, the development of sustainable energy sources has become one of the important tasks today. A two-step synthesis method was employed to construct Ni3S2/ZrCoFe-LDH@NF heterostructured electrocatalysts on nickel foam (NF) in situ. X-ray diffractometer, scanning electron microscope, transmission electron microscope, and X-ray electron spectroscopy were employed to characterize the Ni3S2/ZrCoFe-LDH@NF heterostructure, and the HER, OER and total hydrolysis properties of this electrocatalyst were tested in 1 mol·L-1 KOH electrolyte. It was shown that Ni3S2/ZrCoFe-LDH@NF was a lamellar stacked heterostructure with an overpotential of 330 mV and a Tafel slope of 90.9 mV·dec-1 at a current density of 100 mA·cm-2 in the OER reaction and 159.2 mV at a current density of 10 mA·cm-2 in the HER reaction. The Tafel slope was 96 mV·dec-1, and the catalyst exhibited good structural stability in the 100 h total hydrolysis stability test. The successful construction of this heterostructured electrocatalyst provides a good idea and research basis for the subsequent heterojunction and its application in electrocatalysis.

DOI: 10.1016/j.cjsc.2023.100206

Source: http://cjsc.ac.cn/cms/issues/541