• Home
  • Research
    • Design of Energy Conversion Ma...
    • Development of in situ Surface...
    • Expansion of Synchrotron Radia...
    • Hot Papers
  • Publication
    • 2021-2025
    • 2016-2020
    • 2010-2015
    • 2009 and Before
  • Facilities
  • Members
    • Principal Investigator
    • Postdoctoral Fellows
    • Ph.D. Students
    • M.S. Students
    • Graduated Students
  • Join us

Congratulations to Shuowen Bo for his paper about Engineering high-spin state cobalt cations in sulfide spinel for enhancing water oxidation published on Small Methods

发布者:张宇浩发布时间:2023-12-20动态浏览次数:16

The spin states of active sites have a significant impact on the adsorption/desorption ability of the reaction intermediates during the oxygen evolution reaction (OER). Sulfide spinel is not generally considered a highly efficient OER catalyst owing to the low spin state of Co3+ and the lack of unpaired electrons available for adsorption of reaction intermediates. Herein, it is proposed a novel Nd-evoked valence electronic adjustment strategy to engineer the spin state of Co ions. The unique f-p-d orbital electronic coupling effect stimulates the rearrangement of Co d orbital electrons and increases the eg electron filling to achieve high-spin state Co ions, which promotes charge transport by propagating a spin channel and generates a high number of active sites for intermediate adsorption. The optimized CuCo1.75Nd0.25S4 catalyst exhibits outstanding electrocatalytic properties with a low overpotential of 320 mV at 500 mA cm−2 and a 48 h stability at 300 mA cm−2. In situ synchrotron radiation infrared spectra confirm the quick accumulation of key *OOH and *O intermediates. This work deepens the comprehensive understanding of the relationship between OER activity and spin configurations of Co ions and offers a new design strategy for spinel compound catalysts.


地址:No.42, Hezuo South Road Shushan District, Hefei, Anhui, 230029, P.R.China. 电话:0551-63602117Email:qhliu@ustc.edu.cn

Copright © 2020 lxafs.ustc.edu.cn All Right Reserved. 版权所有 中国科学技术大学能源转换与原位表征实验室制作维护