(NixFeyCo6-x-y)Mo6C cuboids as outstanding bifunctional electrocatalysts for overall water splitting

Heterogeneous NiFeCoP/NF Nanorods as a Bifunctional Electrocatalyst for Efficient Water Electrolysis

“…The formation of NiOOH along with the peak of P at low binding energy significantly decreased (Figure S20d), but the catalyst still exhibits excellent stability during the OER process due to the NiOOH is the true active species for OER. [43] After HER stability test, the XPS spectra (Figure S21) show that the peaks of NiÀ P, CoÀ P, and CoÀ P species are completely vanished and the strength of P 2p is obviously reduced, suggesting that the partial P atoms on the surface of catalyst are etching away in the HER catalytic process.…”

Modulation of the coordination environment enhances the electrocatalytic efficiency of Mo single atoms toward water splitting

“…To characterize the HER performance of the three Mo SACs, the catalyst powders were dispersed in Naon solutions for dropcasting onto nickel iron foam (NIF) to afford the sample From the values of the Tafel slopes, it can be concluded that the HER proceeds through the Volmer-Tafel route (electrochemical adsorption followed by chemical desorption) for Mo-O 2 C 2 as for Pt/C and the Volmer-Heyrovsky route (electrochemical adsorption followed by electrochemical desorption) for Mo-O 2 N 1 C 1 . 7,44 For Mo-O 2 N 2 , the Volmer and Heyrovsky steps serve as the competing rate-limiting steps for catalyzation of the HER. 7,45 The LSV curves and Tafel plots of NIF and the three control catalysts (CB-phen a650 , CB-phen-DCD100 a650 , and CBphen-DCD200 a650 ), prepared without the presence of the Mo precursor, corresponding to the three Mo SACs (Mo-O 2 C 2 , Mo-O 2 N 1 C 1 , and Mo-O 2 N 2 , respectively) are further shown in Fig.…”

Low Overpotential Overall Water Splitting by a Cooperative Interface of Cobalt-Iron Hydroxide and Iron Oxyhydroxide

“…The combination of robust intrinsic activity and the abundance of exposed active sites of catalyst enhances the efficiency of a catalyst. 59 In electrocatalysis, inherent activity and the amount of exposed active sites can be calculated using turnover frequency (TOF) and electrochemical surface area (ECSA). 60 TOF value is estimated by taking the exact number of electrochemical accessible sites using a cyclic voltammetry (CV) curve (Figures 6A and S7).…”