Ternary and Quaternary Nickel-Iron-Oxide-Based Thin Films as Oxygen Evolution Reaction Catalysts in Alkaline Media
[1];
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[3]
- Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Karlsruhe Institute of Technology (KIT) (Germany)
- Stanford University, CA (United States)
- Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Alkaline water electrolyzers are a promising technology for energy storage and conversion through the electrochemical production of hydrogen, however the slow kinetics of the oxygen evolution reaction (OER) pose a major challenge. The alkaline environment enables the use of non-Pt-group metals as OER catalysts, in particular NiFe-based materials. In this study, Mn and/or Cr were elementally mixed with NiFe to further improve the OER catalyst properties through a controlled, systematic synthesis process involving thin films prepared by electron beam-induced physical vapor deposition (PVD). By exploring both simultaneous co-deposition and serial deposition of the different metals, the OER performance was investigated as a function of both the location of Mn or Cr in the multi-metal NiFe-based catalysts and the difference between surface versus bulk mixing. The distinct differences in the redox dynamics, surface oxidation, and stability of the seven studied catalysts reveal metal Cr- and/or Mn-overlayers as a promising synthesis approach for fine-tuning of catalyst properties and improving the OER performance.
- Research Organization:
- LELAND STANFORD JUNIOR UNIVERSITY, THE
- Sponsoring Organization:
- Carl-Zeiss Stiftung; Leopoldina postdoc fellowship program; Postdoc.Mobility fellowship program; USDOE Office of Science (SC), Basic Energy Sciences (BES).
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 3025099
- Journal Information:
- ACS Catalysis, Journal Name: ACS Catalysis
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
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