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Title: Low-dimensional hyperthin FeS 2 nanostructures for efficient and stable hydrogen evolution electrocatalysis

We report a scalable, solution-processing method for synthesizing low-dimensional hyperthin FeS 2 nanostructures, and we show that 2D FeS 2 disc nanostructures are an efficient and stable hydrogen evolution electrocatalyst. By changing the Fe:S ratio in the precursor solution, we were able to preferentially synthesize either 1D wire or 2D disc nanostructures. The 2D FeS 2 disc structure has the highest electrocatalytic activity for the hydrogen evolution reaction, comparable to platinum in neutral pH conditions. Moreover, the ability of the FeS 2 nanostructures to generate hydrogen was confirmed by scanning electrochemical microscopy, and the 2D disc nanostructures were able to generate hydrogen for over 125 h.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [3] ;  [1]
  1. Univ. of Kansas, Lawrence, KS (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ. of Kansas, Lawrence, KS (United States); Temple Univ., Philadelphia, PA (United States)
Publication Date:
Report Number(s):
BNL-111798-2016-JA
Journal ID: ISSN 2155-5435; R&D Project: MA015MACA; KC0201010
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
ACS Catalysis
Additional Journal Information:
Journal Volume: 5; Journal Issue: 11; Journal ID: ISSN 2155-5435
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1241482