Demonstrating the source of inherent instability in NiFe LDH-based OER electrocatalysts

Abstract

Nickel-iron layered double hydroxides are known to be one of the most highly active catalysts for the oxygen evolution reaction in alkaline conditions. The high electrocatalytic activity of the material...

Constructing abundant interfaces by decorating MoP quantum dots on CoP nanowires to induce electronic structure modulation for enhanced hydrogen evolution reaction

“…We conducted Tafel slope analysis to gain a deeper understanding of the intrinsic reaction kinetics and mechanism of the catalytic process. 54 As depicted in Fig. 5b, the Tafel slope analysis of the CoCH/Cu(OH) 2 /CF electrode reveals an exceptionally low value of 95.1 mV dec −1 , indicating fast reaction kinetics and a typical Volmer–Heyrovsky reaction mechanism.…”

Repurposing the current collector of a car battery module into a bifunctional electrode for overall electrochemical water splitting

“…1.40 V vs. RHE). 64 For our study the FNC electrode was investigated further via cross section SEM imaging (Fig. S3 †) which indeed shows that Fe/Ni leached from parts of the surface which would account for iron oxide redeposition when the electrochemical system returned to open circuit conditions aer the OER.…”

Tuning the Surface Electronic Structure of Amorphous NiWO4 by Doping Fe as an Electrocatalyst for OER

“…There are three characteristics peaks at 528.90, 529.81, and 531.25 eV which correspond to M−O−M, M−OH, and intercalated water molecules. It is noted that the M−O−M peak has been shifted toward higher binding energy by 0.21 eV showing the decrease in the electron density over oxygen after doping of the Fe atom over amorphous NiWO 4 .Besides, we also obtained the Fe 2p XPS spectra of Fe-doped amorphous NiWO 4 which exhibit a peak at 712.54 eV ascribed as Fe 2p 3/2 of Fe 3+ as shown in Figure4d 52. These results demonstrate that the transfer of electrons from the Ni to Fe site makes Ni site deficient, and this deficient site will easily accommodate the incoming OH − ions and facilitate the OER process.…”