Spinel oxide CoFe₂O₄ grown on Ni foam as an efficient electrocatalyst for oxygen evolution reaction

Abstract

The effect of the oxygen evolution reaction (OER) is important in water splitting.

Integrated Bifunctional Electrodes Based on Amorphous Co–Ni–S Nanoflake Arrays with Atomic Dispersity of Active Sites for Overall Water Splitting

“…56 Meanwhile, this electrode also has a low Tafel slope (52 mV dec −1 ) than all other control samples, as shown in Figure 4b, manifesting a favorable OER kinetics with reversible one-electron transfer before a chemical turnoverlimiting step. 13 By contrast, the catalytic activity of Co 4 Ni 1 S/ CC is comparable to the state-of-the-art Co or Ni-based OER catalysts previously reported, such as the Co−S/Ti mesh (η 10 = 361 mV), 6 CoFe 2 O 4 /NF (η 10 = 273 mV), 57 NiFeCoPi/P (η 10 = 299 mV), 58 etc. (see summary in Table S3).…”

Impact of inversion and non-stoichiometry on the transport properties of mixed zinc-cobalt ferrites

“…26,27 Intriguingly, it exhibits a p-type semiconducting behavior, 28,29 making it desirable for, e.g., (photo-)electrocatalytic applications. [30][31][32][33][34] However, the impact of mixing both ferrites on the degree of inversion, the composition, and the non-stoichiometry on the electrical transport mechanism in the quaternary system remains unclear.…”

Bimetallic iron cobalt oxide nanoclusters embedded on three-dimensional flower-like iron cobalt oxide nanosheets for improved oxygen evolution reaction

“…have been investigated for OER performance. 16,[25][26][27][28][29] The partial substitution of an active redox element Fe (d 6 ) may result in increased d-electron deficiency, favouring OER features. To date, numerous approaches on non-noble metal-based SOCs have been used to compete with the high OER performance of noble metal-based catalysts, including regulating phase composition, shape, and intrinsic defects and metal doping.…”