Phosphorus doped nickel-molybdenum aerogel for efficient overall water splitting

Reprogramming the redox states of nickel via interface engineering and heteroatom doping to boost overall water splitting

“…5e). 7,9,12,34,45,[48][49][50] To investigate the origin of the excellent activity of EO-Cu 3 -Fe 2 -Ni 50 /NF, the electrochemical impedance spectra (EIS) and effective electrochemical surface areas (ECSA) of the catalysts have been analyzed. The charge transfer resistance (R ct ) of EO-Cu 3 -Fe 2 -Ni 50 /NF is found to be only 1.0 U based on its equivalent circuit, enabling the catalyst to rapidly transfer charges from its active sites to the intermediates during OER catalysis (Fig.…”

“…7f). 7,9,34,45,[47][48][49][50]56 In situ Raman spectroscopy is employed to further shed light on the HER catalytic mechanisms. During the HER, two characteristic Raman bands of Ni(OH) 2 are recorded at $446 and $506 cm À1 on all the samples, though with slight differences in the Raman shi (Fig.…”

“…However, the scarcity, high price and poor stability have limited their largescale applications. 7,8 Besides, most effective catalysts are mono-functional, either for HER or for OER catalysis, because the activity and stability of the catalysts are inadequate for both processes in the same media. Therefore, it is imperative to develop bifunctional electrocatalysts with low cost, high catalytic activity, and good stability to achieve efficient and simultaneous hydrogen production.…”

Construction of MnxCoyO4/Ti electrocatalysts for efficient bifunctional water splitting

“…56 The spectral analysis of O 1s showed that the hydroxyl group and water existed on the surface of the material, which enhanced the hydrophilicity of the material, which was favorable for the electrocatalytic reaction. 57,58…”

Pt doping and strong metal–support interaction as a strategy for NiMo-based electrocatalysts to boost the hydrogen evolution reaction in alkaline solution

“…Previous studies have shown that an Mo site enhances the hydrophilicity of catalysts: the addition of Mo adjusts the electronic structure of Ni, optimizes the bonding and strength between H* intermediate and NiMo, and reduces the energy barriers for hydrolysis and dissociation. 42 Yan et al confirmed that the Pt site has near-zero H binding energy and strong electron supply capacity derived from the high occupancy of the Pt 5d band near the Fermi level, which promotes the desorption of H during the catalytic reaction. 43 Based on the above conclusions, we speculated that the Mo site mainly plays the role of water adsorption in the HER, while the Ni site tends to dissociate water to produce H*, and then H* intermediate is transferred to Pt site for H 2 desorption (Fig.…”