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Title: Mixed-Metal Nickel–Iron Oxide Aerogels for Oxygen Evolution Reaction

Journal Article · · ACS Catalysis
 [1];  [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Bar-Ilan Univ., Ramat Gan (Israel). Chemistry Department; Bar-Ilan Univ., Ramat Gan (Israel); Bar-Ilan Center for Nanotechnology and Advanced Materials
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Alkaline electrolyte membrane electrolyzers are a promising technology to efficiently produce clean hydrogen without the use of critical raw materials. At the heart of these electrolyzers are the electrocatalysts, which facilitate the cathodic and anodic reactions, with the latter oxygen evolution reaction (OER) being the most sluggish. In recent years, aerogels have become a very well-studied class of materials due to their unique properties, including very high surface area. Until now, aerogels have not been used to catalyze the OER by themselves but were mainly considered catalyst supports. Here, mixed-metal nickel–iron oxide aerogels were synthesized with a modified epoxide route synthesis and tested as OER catalysts. Depending on the Ni/Fe ratio, they show very high catalytic activity and low overpotential to reach 10 mA cm–2 (at η = 380 mV). This activity is beyond that of the existing state-of-the-art platinum group metal-free OER catalysts.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Israeli Ministry of Energy
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1997788
Journal Information:
ACS Catalysis, Vol. 12, Issue 19; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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