Synthesis and Characterization of Fe 3+ and CeO 2 Co-decorated NiOOH Electrocatalysts Supported by Nickel Foam for the Oxygen Evolution Reaction
International Journal of Electrochemical Science, ISSN: 1452-3981, Vol: 14, Issue: 7, Page: 6532-6545
2019
- 15Citations
- 6Captures
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Article Description
Inexpensive and non-noble metal catalysts for the oxygen evolution reaction (OER) with high activity and stability must be developed to enhance water electrolysis for hydrogen production. Herein, Fe 3+ dopants and flower-shaped CeO 2 -decorated NiOOH catalysts are synthesized, and the synergetic effect of Fe 3+ dopants and CeO 2 are investigated. The presence of both Fe 3+ dopants and CeO 2 produces more NiOOH species and more oxygen vacancies in the NiOOH structure as measured by X-ray photoelectron spectroscopy. Electrochemical measurements illustrate that the increase in oxygen vacancies in NiOOH significantly increases the conductivity and activity of the catalyst and reduces the OER overpotential. Among the catalysts studied in this research, CeO 2 -NiFeOH/NF, which is modified by both Fe 3+ dopants and CeO 2, hosts the highest number of oxygen vacancies. It also has the lowest overpotential (280 mV), the highest current density, and excellent stability with high performance for the OER.
Bibliographic Details
Elsevier BV
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