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Title: A porous proton-relaying metal-organic framework material that accelerates electrochemical hydrogen evolution

The availability of efficient hydrogen evolution reaction (HER) catalysts is of high importance for solar fuel technologies aimed at reducing future carbon emissions. Even though Pt electrodes are excellent HER electrocatalysts, commercialization of large-scale hydrogen production technology requires finding an equally efficient, low-cost, earth-abundant alternative. Here, high porosity, metal-organic framework (MOF) films have been used as scaffolds for the deposition of a Ni-S electrocatalyst. Compared with an MOF-free Ni-S, the resulting hybrid materials exhibit significantly enhanced performance for HER from aqueous acid, decreasing the kinetic overpotential by more than 200 mV at a benchmark current density of 10 mA cm−2. In conclusion, although the initial aim was to improve electrocatalytic activity by greatly boosting the active area of the Ni-S catalyst, the performance enhancements instead were found to arise primarily from the ability of the proton-conductive MOF to favourably modify the immediate chemical environment of the sulfide-based catalyst.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [2] ;  [5] ;  [6] ;  [5] ;  [7] ;  [6]
  1. Northwestern Univ., Evanston, IL (United States); Northwestern Univ., Evanston, IL (United States). Argonne-Northwestern Solar Energy Research (ANSER) Center
  2. Northwestern Univ., Evanston, IL (United States)
  3. Northwestern Univ., Evanston, IL (United States); Warsaw Univ. of Technology, Warsaw (Poland)
  4. Northwestern Univ., Evanston, IL (United States); Northwestern Univ., Evanston, IL (United States). Argonne-Northwestern Solar Energy Research (ANSER) Center; National Taiwan Univ., Taipei (Taiwan)
  5. Univ. of California, San Diego, CA (United States)
  6. Northwestern Univ., Evanston, IL (United States); Northwestern Univ., Evanston, IL (United States). Argonne-Northwestern Solar Energy Research (ANSER) Center
  7. Northwestern Univ., Evanston, IL (United States); Northwestern Univ., Evanston, IL (United States). Argonne-Northwestern Solar Energy Research (ANSER) Center; King Abdulaziz Univ., Jeddah (Saudi Arabia)
Publication Date:
OSTI Identifier:
1258602
Grant/Contract Number:
SC0001059
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE