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Title: La- and Mn-doped cobalt spinel oxygen evolution catalyst for proton exchange membrane electrolysis

Journal Article · · Science
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [2]; ORCiD logo [1]; ORCiD logo [4];  [5]; ORCiD logo [1]; ORCiD logo [6]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [2]; ORCiD logo [7]
  1. Argonne National Laboratory (ANL), Argonne, IL (United States)
  2. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials (CNM)
  4. Giner Inc., Auburndale, MA (United States)
  5. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  6. Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  7. Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)

Discovery of earth-abundant electrocatalysts to replace iridium for the oxygen evolution reaction (OER) in a proton exchange membrane water electrolyzer (PEMWE) represents a critical step in reducing the cost for green hydrogen production. Here we report a nanofibrous cobalt spinel catalyst codoped with lanthanum (La) and manganese (Mn) prepared from a zeolitic imidazolate framework embedded in electrospun polymer fiber. The catalyst demonstrated a low overpotential of 353 millivolts at 10 milliamperes per square centimeter and a low degradation for OER over 360 hours in acidic electrolyte. A PEMWE containing this catalyst at the anode demonstrated a current density of 2000 milliamperes per square centimeter at 2.47 volts (Nafion 115 membrane) or 4000 milliamperes per square centimeter at 3.00 volts (Nafion 212 membrane) and low degradation in an accelerated stress test.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Hydrogen Fuel Cell Technologies Office (HFTO); USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC02-06CH11357; NA0003525
OSTI ID:
1999225
Alternate ID(s):
OSTI ID: 2311503
Report Number(s):
SAND-2023-04893J; 183567
Journal Information:
Science, Vol. 380, Issue 6645; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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