Self‐Supported CoP‐Decorated Hierarchical CuO Nanowire Flowers Toward Enhanced Oxygen Evolution Reaction

Abstract

The facile fabrication of high-performance and low-cost photo-/ electro-catalysts for oxygen evolution reaction (OER) still presents a tough challenge. Herein, a type of hierarchically ultra-fine CoP attached to CuO nanowire flowers (CuO NWF-CoP/CF) has been obtained by a simple electrodeposition method. Due to the merits of the 3D hierarchical structure with large surface areas, rich active sites, and open-channels for effective gas diffusion, as-achieved CuO NWF-CoP/CF catalysts exhibit outstanding OER activity with an overpotential of 230 mV for OER to achieve a current density of 50 mA cm À 2 in alkaline media. This work provides a novel method to prepare hierarchical self-supported electrocatalyst towards efficient water splitting.

The synergistic catalysis effect on electrochemical nitrate reduction at the dual-function active sites of the heterostructure

“…The peaks of o-CoP/C@Cu 3 P/CF matched well with the Cu phase (PDF#85-1362), Cu 3 P phase (PDF#71-2261), and CoP phase (PDF#29-0497), confirming the presence of the heterostructure. 18,19 Furthermore, the above CoP phase and Cu 3 P phase were also observed in the contrast samples of CoP/C@CF and Cu 3 P/CF, respectively. However, the low mass ratio and crystallinity resulted in the weak diffraction peak of the CoP phase (Table S1 and Fig.…”

“…Meanwhile, NH 3 is gaining increasing prominence in new energy fields because of its advantage of high-efficiency hydrogen storage and carbon-free energy storage. 3 Up to now, the industrial NH 3 production remains heavily reliant on the Haber-Bosch technology, in which the high reaction temperature (400-550 1C), high reaction pressure (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25), and the feedstock (H 2 ) supply require the consumption of massive conventional fuels. 4 To alleviate the pressure of environment and energy, the electrochemical nitrate reduction reaction (NITRR) technology has been developed for the removal of nitrate pollutants in water and synthesis of value-added chemical (NH 3 ).…”

In situ construction of heterostructured CuxO@NiCoS nanoarrays for alkaline overall water splitting

“…3f). 48,51,52 The observed binding energy deviation of Cu x O@NiCoS-1/CF compared with single components (Cu x O/CF and NiCoS/CF) demonstrates that the charge transfer process occurs between Cu x O and NiCoS through the intimate heterointerface with strong electron interaction. This will reduce the binding energy of the intermediate and accelerate the catalytic rate, thus significantly improving the electrocatalytic performance.…”

Effect of Cooperative Redox Property and Oxygen Vacancies on Bifunctional OER and HER Activities of Solvothermally Synthesized CeO2/CuO Composites

“… CuO + OH − ⇔ Cu 2 normalO + normalH 2 normalO + normalO 2 Furthermore, Cu-based oxides possess remarkable HER activity owing to their low energy barrier for hydrogen adsorption . Recently, various self-supported Cu-based oxides have gained attention as HER, OER, and bifunctional water-splitting catalysts. , However, the electrochemical properties of Cu-based materials are still lagging behind Ni-, Co-, or Fe-based materials . Therefore, it is important to search for efficient Cu-based electrocatalysts that are comparable to or better than the well-known Ni-, Co-, or Fe-based electrocatalysts.…”