Regulation of the adsorption sites of Ni₂P by Ru and S co-doping for ultra-efficient alkaline hydrogen evolution

Abstract

The development of alkaline hydrogen evolution catalysts is a demanding, and highly desirable task to expand clean energy applications, but is hindered by the sluggish kinetics of alkaline electrochemistry water...

Defect-activated surface reconstruction: mechanism for triggering the oxygen evolution reaction activity of NiFe phosphide

“…In the Ni 2p spectrum, the main peak at 853.8 eV aer deconvolution corresponds to Ni-P, and there are also a pair of peaks with binding energies of 857.1 and 875.2 eV, corresponding to Ni 2 p 3/2 and 2 p 1/2 orbitals, respectively, and a pair of satellite peaks. 18,[25][26][27] The peaks of Fe 2p 3/2 and Fe 2p 1/2 are located at 712.4 and 725.2 eV, respectively. In addition, a peak at 708.1 eV can be detected, which is attributed to Fe-P 23,[28][29][30] The binding energy of Ni for d-NiFeP/CC is positively shied by 0.6 and 0.7 eV at the 2p 3/2 and 2p 1/2 spin peaks compared to that of NiFeP/CC.…”

Optimizing Hydrogen Binding on Ru Sites with RuCo Alloy Nanosheets for Efficient Alkaline Hydrogen Evolution

“…[ 5 , 17 ] Generally, too weak Ru−H binding energy results in a poor proton adsorption during HER, while too strong Ru−H binding energy will poison the Ru sites and thus hinder the H 2 formation. [18] Though numerous efforts have been made to promote the HER activity of Ru‐based catalysts, such as alloy,[ 7 , 16 , 19 ] sulfide,[ 20 , 21 , 22 , 23 , 24 ] and phosphides,[ 25 , 26 , 27 , 28 , 29 ] etc., the intrinsic relationship between Ru−H binding energy and HER activity is still ambiguous. Revealing the essential interaction between Ru and H in Ru−H bonds and the accurate regulation of Ru−H binding energy have become a potential strategy to achieve better HER performance.…”

Ni2P–Co2P Nanowire Arrays on Nickel Foam as a Robust pH-Universal Electrocatalyst for High-Efficiency Hydrogen Evolution Reaction

“…As we can see from Figure a, the high-resolution XPS spectra of the Ni 2p 3/2 peak in Ni 2 P–Co 2 P consist of five small peaks. Among them, the peak at the binding energy of 853.9 eV can be ascribed to the metallic NiO species, which may be derived from the incomplete reaction of Ni oxides and H 3 P or from the oxidation of the sample surface. , Moreover, we can clearly see two peaks at 856.8 eV and 858.6 eV, which indicates the existence of Ni 2+ and Ni 3+ , respectively . The other two remaining peaks are shakeup satellite peaks.…”