Journal
DALTON TRANSACTIONS
Volume 51, Issue 30, Pages 11457-11466Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2dt01370c
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Funding
- CNRS
- Universite de Toulouse - Paul-Sabatier
- National Foundation for Science and Technology Development (NAFOSTED) [103.992019.328]
- ANR [ANR-17-CE07-0022-01]
- Region Occitanie [ALDOCT000355]
- French embassy in Hanoi
- Agence Nationale de la Recherche (ANR) [ANR-17-CE07-0022] Funding Source: Agence Nationale de la Recherche (ANR)
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This study focuses on the development of sustainable catalytic processes for the production of hydrogen from water. NiFe-based nanoparticles have been synthesized and characterized, showing promising performance in the electrocatalytic oxygen evolution reaction. The Ni2Fe1 nanocatalyst exhibits the lowest overpotential and excellent stability.
Production of hydrogen from a renewable source that is water requires the development of sustainable catalytic processes. This implies, among others, developing efficient catalytic materials from abundant and low-cost resources and investigating their performance, especially in the oxidation of water as this half-reaction is the bottleneck of the water splitting process. For this purpose, NiFe-based nanoparticles with sizes ca. 3-4 nm have been synthesized by an organometallic approach and characterized by complementary techniques (WAXS, TEM, STEM-HAADF, EDX, XPS, and ATR-FTIR). They display a Ni core and a mixed Ni-Fe oxide shell. Once deposited onto FTO electrodes, they have been assessed in the electrocatalytic oxygen evolution reaction under alkaline conditions. Three different Ni/Fe ratios (2/1, 1/1 and 1/9) have been studied in comparison with their monometallic counterparts. The Ni2Fe1 nanocatalyst displayed the lowest overpotential (320 mV at j = 10 mA cm(-2)) as well as excellent stability over 16 h.
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