Journal
MATERIALS LETTERS
Volume 316, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.131999
Keywords
Water oxidation; Layered double hydroxide; Nanomaterial; Electrocatalysis
Funding
- Key-Area Research andDevelopment Program of Guangdong Province [2020B010181001]
- Self-innovation Research Funding Project of Hanjiang Labora-tory [HJL202002A001]
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Ni-Fe layered double hydroxide (LDH) catalysts with varying oxygen evolution reaction (OER) performance were synthesized using a facile chloride corrosion method. The catalysts prepared with ferric salts exhibited enhanced OER performance compared to those prepared with ferrous salts, attributed to the formation of Ni-Fe LDH and additional FeOOH.
A facile chloride corrosion method was adopted to synthesize Ni-Fe layered double hydroxide (LDH) materials on Ni foam. Ni-Fe LDH catalysts with varying oxygen evolution reaction (OER) performance were obtained by using different iron salts. The reasons for differences in the OER activity were investigated through experiments and characterizations. Structural characterization results showed that Fe3+ salts generated Ni-Fe LDH on nickel foam (NF), and FeOOH was additionally obtained by Fe2+ salts. Compared with NiFe/NF prepared with ferrous salts precursors, NiFe/NF catalysts produced using ferric salts exhibited markedly enhanced OER performance, presenting lower overpotentials of approximately 290 mV to deliver a current density of 100 mA cm-2 and lower Tafel slopes of approximately 96 mV dec- 1 in 1.0 M KOH.
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