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Title: Mesoporous Iron Sulfide for Highly Efficient Electrocatalytic Hydrogen Evolution

Here, we report a facile synthetic protocol to pre-pare mesoporous FeS 2 without the aid of hard template as an electrocatalyst for the hydrogen evolution reaction (HER). The mesoporous FeS 2 materials with high surface area were successfully prepared by a sol-gel method follow-ing a sulfurization treatment in an H 2S atmosphere. A re-markable HER catalytic performance was achieved with a low overpotential of 96 mV at a current density of 10 mA·cm 2 and a Tafel slope of 78 mV per decade under alka-line conditions (pH 13). These theoretical calculations indicate that the excellent catalytic activity of mesoporous FeS 2 is attributed to the exposed (210) facets. The mesoporous FeS 2 material might be a promising alternative to the Pt-based electrocatalysts for water splitting.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [4] ;  [5] ;  [6]
  1. Univ. of Connecticut, Storrs, CT (United States). Dept. of Chemistry
  2. Univ. of Connecticut, Storrs, CT (United States). Inst. of Materials Science, Dept. of Materials Science and Engineering
  3. Univ. of Connecticut, Storrs, CT (United States). Inst. of Materials Science
  4. Univ. of Connecticut, Storrs, CT (United States). Dept. of Chemical and Biomolecular Engineering
  5. Univ. of Connecticut, Storrs, CT (United States). Inst. of Materials Science and Dept. of Materials Science and Engineering
  6. Univ. of Connecticut, Storrs, CT (United States). Dept. of Chemistry, Inst. of Materials Science, Dept. of Materials Science and Engineering, and Dept. of Chemical and Biomolecular Engineering
Publication Date:
Grant/Contract Number:
FG02-86ER13622
Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 139; Journal Issue: 39; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Research Org:
Univ. of Connecticut, Storrs, CT (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE
OSTI Identifier:
1378319