Title: Aerogel-derived nickel-iron oxide catalysts for oxygen evolution reaction in alkaline media

Journal Article · · Applied Catalysis. B, Environmental
ORCiD logo [1]; ORCiD logo [2];  [2];  [3];  [2];  [4];  [4];  [3];  [2];  [4];  [1]
  1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  2. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  3. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  4. Argonne National Laboratory (ANL), Argonne, IL (United States)

Anion exchange membrane water electrolyzers (AEMWEs) can generate hydrogen with a pure water feed using noble metal-free catalysts. Here, the development of highly active and stable catalysts for oxygen evolution reaction (OER) is required for improving performance of AEMWEs systems. Ni-Fe (oxy)hydroxides show high OER catalytic activity in alkaline media, but typically have low surface area. In this work, we investigate a series of Ni-Fe oxides with high surface area and disordered morphology, obtained using an aerogel synthesis method. We evaluate the impact of different synthesis variables on the OER activity and demonstrate that heat treatment at high temperatures generates more ordered structure, resulting in a decrease in OER activity. Advanced characterization reveals that maintaining highly disordered and porous structure of the aerogel is essential to achieving high OER activity, as it enables the formation of highly OER-active lamellar structures of the catalyst.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Hydrogen Fuel Cell Technologies Office (HFTO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
89233218CNA000001; AC02-06CH11357; AC05-00OR22725; AC36-08GO28308
OSTI ID:
2325040
Report Number(s):
LA-UR-24-24897; NREL/JA-5900-89213; MainId:89992; UUID:e930916f-a1f1-492f-99cf-4007d03858ca; MainAdminId:72124
Journal Information:
Applied Catalysis. B, Environmental, Journal Name: Applied Catalysis. B, Environmental Vol. 348; ISSN 0926-3373
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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