Controllable atom implantation for achieving Coulomb-force unbalance toward lattice distortion and vacancy construction for accelerated water splitting

Interfacial stress induced by the adaptive construction of hydrangea-like heterojunctions based on in situ electrochemical phase reconfiguration for highly efficient oxygen evolution reaction at high current density

“…First, the NS nanorod array uniformly loaded on the NF substrate was prepared by a one-step hydrothermal strategy (Fig.1c and d). XRD spectra (Fig.S1 †) well matched the characteristic peaks of NiSe (JCPDS NO 89-2058), proving the successful preparation of the NS catalyst 34. Typically, cyclic voltammetry (CV) activation was performed over the entire redox potential range (1.1 to 1.6 V RHE ) using NS as an operating electrode to activate electrochemical phase transitions.…”

“…S1 †) well matched the characteristic peaks of NiSe (JCPDS NO 89-2058), proving the successful preparation of the NS catalyst. 34 Typically, cyclic voltammetry (CV) activation was performed over the entire redox potential range (1.1 to 1.6 V RHE ) using NS as an operating electrode to activate electrochemical phase transitions. The intensity and integral area of the Ni 2+ /Ni 3+/4+ redox peak in the CV curve (Fig.…”

“…S11 †), the strong EPR signal at g = 2.003 conrms the existence of abundant V Se in the NS/NOOH-30 electrode. 34 As proven, the introduction of vacancies can improve the conductivity and reduce the reaction barrier formed by intermediates, so as to improve the catalytic activity. 8,12,13,34 Therefore, the vacancy is also one of the reasons for the high activity of NS/NOOH-30.…”

“…It has been evidenced that the introduction of lattice strain leads to the shi of the d-band center, thus affecting the electronic structure of the catalyst, improving the intrinsic electronic conductivity, enhancing the binding of active sites to surface adsorbates, and obtaining ideal intermediate binding energies. 21,24,34,37,41,49 Since proper adsorption strength between the active site and reaction intermediate is the key to OER activity, the introduction of lattice strain can signicantly enhance the OER activity of the catalysts. Furthermore, the intensity of the strength of the adsorbed H 2 O (i.e.…”

Construction of CoP/Co2P Coexisting Bifunctional Self-Supporting Electrocatalysts for High-Efficiency Oxygen Evolution and Hydrogen Evolution

“… 35 CoP/Co 2 P can enhance HER and OER performance through synergistic effects, so the combination of different cobalt phosphides may be an effective way to promote electrocatalytic hydrolysis. In addition, heteroatomic doping, 36 nanostructure, and porous structure can be used to expose more catalytic active sites and improve catalytic performance.…”