Research progress of spinel CoFe₂O₄ as an electrocatalyst for the oxygen evolution reaction

Abstract

To satisfy the energy demand of modern society, seeking sustainable, clean and efficient energy production is claimed to be significant. Electrolytic water technology is an efficient and sustainable way to...

High-Entropy Oxides as Electrocatalysts for the Oxygen Evolution Reaction: A Mini Review

“…Original 18 O-isotopic labeling experiments showed that the OER on SrCoO 3−δ performed via both AEM and LOM pathways . Our group also confirmed that the OER reaction was driven by both mechanisms, which was verified by experimental calculations, in situ Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). , However, during the development of OER electrocatalysts, the generation of HOO* in the AEM and the step of deprotonation in the LOM are considered bottlenecks …”

“…43,44 However, during the development of OER electrocatalysts, the generation of HOO* in the AEM and the step of deprotonation in the LOM are considered bottlenecks. 45 2.4. COM and OPM.…”

“…Moreover, because there is no direct experimental technique to observe the LOM process, the possibility of lattice oxygen participates in other pathways for catalysis cannot be excluded. 26 More importantly, the COM achieves electrons transfer of the lowest energy and reversible alternation to overcome the problems in AEM and LOM 45 is worth further studying in the electrocatalytic field.…”

“…Moreover, because there is no direct experimental technique to observe the LOM process, the possibility of lattice oxygen participates in other pathways for catalysis cannot be excluded . More importantly, the COM achieves electrons transfer of the lowest energy and reversible alternation to overcome the problems in AEM and LOM is worth further studying in the electrocatalytic field. To date, most HEO-based OER catalysts are applied in alkaline medium; however, HEO-based electrocatalysts under neutral conditions have been reported rarely. Electrolytes with neutral pH are considered to be cheaper, less corrosive, and safer than alkaline or acidic electrolytes and most stored electrolytes are rivers and oceans that can be applied directly in this case.…”