A Permselective CeO_x Coating To Improve the Stability of Oxygen Evolution Electrocatalysts

Abstract

Highly active NiFeO electrocatalysts for the oxygen evolution reaction (OER) suffer gradual deactivation with time owing to the loss of Fe species from the active sites into solution during catalysis. The anodic deposition of a CeO layer prevents the loss of such Fe species from the OER catalysts, achieving a highly stable performance. The CeO layer does not affect the OER activity of the catalyst underneath but exhibits unique permselectivity, allowing the permeation of OH and O through while preventing the diffusion of redox ions through the layer to function as a selective O -evolving electrode. The use of such a permselective protective layer provides a new strategy for improving the durability of electrocatalysts.

Electronic Redistribution: Construction and Modulation of Interface Engineering on CoP for Enhancing Overall Water Splitting

“…In V‐CoP @ a‐CeO 2 , the Ce 3d 5/2 and Ce 3d 3/2 regions (Figure 3d) are located at binding energies of 880–893 and 896–920 eV, respectively, which validates the coexistence of Ce 4+ (light green area) and Ce 3+ (purple area) 20. Obviously, the peak of Ce 3d negatively shifts about 0.6 eV compared to that of a‐CeO 2 .The Raman spectra (Figure S9, Supporting Information) also show a peak at 464 cm −1 which is attributed to O‐Ce‐O 21. The above analysis results verify the strong electronic interactions at the interface between V‐CoP and a‐CeO 2 , which is beneficial for water electrolysis.…”

Designing Highly Efficient and Long‐Term Durable Electrocatalyst for Oxygen Evolution by Coupling B and P into Amorphous Porous NiFe‐Based Material

“…The superb stability property of the activated NiFePB would also be associated with the unique amorphous structure and intrinsically excellent activity . Many metal phosphides and borides are known for their excellent corrosion resistance, originating from their stable thermodynamics and intact surface oxide layer protection.…”

Size‐Dependent Activity of Iron‐Nickel Oxynitride towards Electrocatalytic Oxygen Evolution

“…The controlled small size of Fe,Ni−P endows the exposure of more active sites, result in increased OER performance. At the same time, the partial existed Fe 2 O 3 also contribute to the enhancement of stability of Fe,Ni−P materials …”