Fabrication of strong bifunctional electrocatalytically active hybrid Cu–Cu₂O nanoparticles in a carbon matrix

Abstract

Earth-abundant copper-based hybrid Cu–Cu2ONPs@C in the carbon matrix exhibited enhanced OER and HER catalytic activity compared to pure Cu2O and CuNPs@C.

In Situ Growth of Ag Nanodots Decorated Cu2O Porous Nanobelts Networks on Copper Foam for Efficient HER Electrocatalysis

“…Recently, several groups have reported that the electrocatalytic performance of Cu 2 O‐based catalysts can be enhanced by the elaborate design of their microstructures, morphologies, and chemical compositions . For example, 3D Cu/Cu 2 O–CuO/rGO composites, a hybrid of Cu–Cu 2 O nanoparticles in a carbon matrix (Cu–Cu 2 ONPs/C), (RGOL/PPS/CNT+RGO)‐Cu 2 O film, and Ag@Cu 2 O/N‐RGO composites have been fabricated to lower the overpotential and improve the electrocatalytic activity.…”

Modular Design of Noble‐Metal‐Free Mixed Metal Oxide Electrocatalysts for Complete Water Splitting

“…1.25 mg cm −2 based on geometric surface area. Powder X‐ray diffraction (pXRD, Supporting Information, Figure S8) showed the presence of crystalline Cu 2 O, which is a known semiconductor with high electron mobility and has recently been reported as OER and HER catalyst . Scanning electron microscopy (SEM), energy dispersive X‐ray spectroscopy (EDX) and transmission electron microscopy (TEM) showed a homogeneous deposition of spherical nanoparticles (diameter ≈200–600 nm) and high aspect‐ratio nanowires (diameter ≈50 nm, length >4 μm, Figure and Figure S6) on the macroporous support.…”

“…Thew ashed and dried samples (hereafter: Electrode 1)w ere examined by gravimetric studies which gave ac atalyst loading of ca. [23,[29][30][31][32][33] Scanning electron microscopy (SEM), energy dispersive X-ray spec-troscopy (EDX) and transmission electron microscopy (TEM) showed ah omogeneous deposition of spherical nanoparticles (diameter % 200-600 nm) and high aspectratio nanowires (diameter % 50 nm, length > 4 mm, Figure 2 and Figure S6) on the macroporous support. Powder Xray diffraction (pXRD,S upporting Information, Figure S8) showed the presence of crystalline Cu 2 O, which is ak nown semiconductor with high electron mobility [28] and has recently been reported as OER and HER catalyst.…”

“…Powder Xray diffraction (pXRD,S upporting Information, Figure S8) showed the presence of crystalline Cu 2 O, which is ak nown semiconductor with high electron mobility [28] and has recently been reported as OER and HER catalyst. [23,[29][30][31][32][33] Scanning electron microscopy (SEM), energy dispersive X-ray spec-troscopy (EDX) and transmission electron microscopy (TEM) showed ah omogeneous deposition of spherical nanoparticles (diameter % 200-600 nm) and high aspectratio nanowires (diameter % 50 nm, length > 4 mm, Figure 2 and Figure S6) on the macroporous support. EDX elemental mapping (Figure 2d and Figure S5) showed ah omogeneous distribution of the elements Cu, Co,and Wont he electrode, and inductively coupled plasma atomic emission spectroscopy gives an atomic ratio of 1:1.5:8 (Co:W:Cu), Table S2.…”

Cu2O−Cu2Se Mixed‐Phase Nanoflake Arrays: pH‐Universal Hydrogen Evolution Reactions with Ultralow Overpotential

“…For instance, Cu 2‐x Se has an efficient HER activity in an acidic electrolyte, but it is necessary to improve its HER performance in pH‐universal electrolytes for commercialization. Recently published research works suggest that manipulation of the metal oxide surface is an useful direction for enhancing their HER performance because oxides such as NiO, Co 3 O 4 , Cu 2 O, CeO 2 , Mn 3 O 4 , and TiO 2 can participate in the reaction as water splitting promoters for HER. Although the use of Cu 2 O itself as a HER electrocatalyst is restrained due to its high overpotential and low current densities, the combination of Cu 2 Se with water dissociation promoters (Cu 2 O) by engineering the anion contents is expected to not only boost the HER kinetic but also optimize the free energy for hydrogen adsorption to achieve a high HER performance.…”