4.7 Article

Co3S4 nanosheets on Ni foam via electrodeposition with sulfurization as highly active electrocatalysts for anion exchange membrane electrolyzer

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 1, 页码 36-45

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.10.169

关键词

Co3S4 nanosheets; Electrocatalyst; Electrodeposition; Hydrogen evolution reaction(HER); AEM water electrolyzer

资金

  1. Fundamental Research Program of the Korean Institute of Materials Science in Republic of Korea [PNK6130]
  2. New & Renewable Energy Core Technology Program of the KETEP in Republic of Korea [KETEP-20173010032080]
  3. Basic Science Research Program of the NRF in the Republic of Korea [NRF-2017R1D1A1B03029419]
  4. National Research Council of Science & Technology (NST), Republic of Korea [PNK6130] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

Co3S4 nanosheets on Ni foam (NS/NF) were prepared by sulfurization for various time after calcination of electrodeposited Co(OH)(2). In our FE-SEM images, we observed that Co3S4 NS was vertically, or obliquely, deposited on the Ni foam. As a result, the structure contained more active sites, and active sites were highly accessible to the electrolyte for the hydrogen evolution reaction (HER). Furthermore, results of XPS and XRD analysis confirmed S-conversion from Co3O4 to Co3S4 during sulfurization. 3-Co3S4 NS/NF with sulfurization for 3 h exhibited the highest sulfur content, while Co3S4 began to desulfurize to Co9S8 after sulfurization for 4 h. The 3-Co3S4 NS/NF electrocatalyst showed a lowest overpotential of 93 mV at -10 mA/cm(2), with a Tafel slope of -55.1 mV/dec in N-2-purged 1 M KOH. Also, the single cell anion exchange membrane water electrolyzer (AEMWE) showed a high current density of 431 mA/cm(2) with cell voltage 2.0 V-cell at 40-45 degrees C. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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