Structural reorganization of CuO/Cu2[Fe(CN)6] nanocomposite: characterization and electrocatalytic effect for the hydrogen peroxide reduction

Abstract

We report the study on the formation of the Cu 2 [Fe(CN) ] nanocomposite, which was obtained from copper oxide nanoparticles (CuO NPs) and Prussian Blue precursors. UV-vis analysis indicated that Cu 2+ ions are released from CuO NPs, while Fe 3+ ions are adsorbed onto the structure of CuO due to a sharp increase in zeta potential (from-30 to 0 mV) after the formation of the Cu 2 [Fe(CN) 6 ]. Moreover, energy dispersive spectroscopy confi rmed that Fe 3+ ions are trapped in the CuO NPs structure. The CuO/ Cu 2 [Fe(CN) 6 ] nanocomposite exhibited the monoclinic and face-centered cubic phases that correspond to the CuO and Cu 2 [Fe(CN) 6 ] components. Cyclic voltammetry (CV) for the Nanocomposite modifi ed electrode revealed two well-defi ned redox couples at-0.073 ((E 1/2) 1) and 0.665 mV ((E 1/2) 2), attributed to the conversion of Cu 2+ to Cu + and CuFe 2+ CuFe 3+ pairs, respectively, which is similar to those in the CuO and Cu 2 [Fe(CN) 6 ] components. Furthermore, the catalytic activity of the nanocomposite towards hydrogen was investigated through CV, where the reduction of H 2 O 2 led to increased currents for the electrochemical process associated with the fi rst redox pair. In contrast, for isolated materials (CuO NPs and Cu 2 [Fe(CN) 6 ]), there was no signifi cant increase in the current associated with either redox pair.

Facile Synthesis of Low-Cost Copper-Silver and Cobalt-Silver Alloy Nanoparticles on Reduced Graphene Oxide as Efficient Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media

“…However, the downsides of the first and the last are their low chemical, physical, or thermal stability, and the noble metals’ high price and the catalysis of H 2 O 2 decomposition decrease their applicability [ 22 ]. The need for low-cost, stable, biocompatible materials with high catalytic activity for HPRR has resulted in the production of transition metal oxide-based materials [ 8 , 22 , 23 , 24 ] and carbon materials [ 25 , 26 , 27 ].…”

Quantification of Neuronal Cell-Released Hydrogen Peroxide Using 3D Mesoporous Copper-Enriched Prussian Blue Microcubes Nanozymes: A Colorimetric Approach in Real Time and Anticancer Effect

“…The interaction between copper molecules and the inorganic PB causes modifications in the surroundings of functional groups, resulting in observed spectral variations. Moreover, the FT-IR spectrum of the Meso-Cu-PBMCs displays three main bands at 428, 476, and 590 cm –1 , which can be attributed to the deformation mode of Fe–C, the stretching mode of Cu–CN, and the stretching mode of Fe–CN, respectively . Furthermore, absorption bands near 625, 663, and 1609 cm –1 , corresponding to the stretching, bending, and H–O–H bending modes of O–H, respectively, indicate the presence of interstitial water in the samples .…”

“…Moreover, the FT-IR spectrum of the Meso-Cu-PBMCs displays three main bands at 428, 476, and 590 cm −1 , which can be attributed to the deformation mode of Fe−C, the stretching mode of Cu−C�N, and the stretching mode of Fe−C�N, respectively. 52 Furthermore, absorption bands near 625, 663, and 1609 cm −1 , corresponding to the stretching, bending, and H−O−H bending modes of O−H, respectively, indicate the presence of interstitial water in the samples. 53 Therefore, the FT-IR results confirm the successful synthesis of the Meso-Cu-PBMCs nanocomposite through the in situ coprecipitation method.…”