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Strong Bifunctional Electrocatalytic Active Hybrid Cu-Cu2O Nanoparticles Fabrication in Carbon Matrix and Comparing Activity with Pure Cu2O and Cu Nanoparticles

Abstract

The earth abundant cost effective hybrid Copper-cuprous oxide nanoparticles in the carbon matrix (Cu-Cu2ONPs@C) has been fabricated and used as bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). At 0.1 mg loading, OER studies of Cu-Cu2ONPs@C showed considerably low onsetpotential of 932 mV (vs RHE) @ 10 mA/cm2 with applied potential of 1.242 V in 0.4 M KOH. HER studies showed onsetpotential of -672 mV (vs RHE) @ 10 mA/cm2 with applied potential of -1.058 V in 0.4 M H2SO4. Cu-Cu2ONPs@C showed good electrocatalytic current density of 57.7 mA/cm2 for OER and -125 mA/cm2 for HER at significantly low catalyst loading. For controlled studies, Cu2ONPs and CuNPs in carbon matrix have also been synthesized and compared the catalytic activities (OER and HER) with hybrid Cu-Cu2ONPs@C. The comparative studies indicated that presence of conducting metal CuNPs along with Cu2ONPs in carbon matrix enhanced the electrocatalytic activity for both OER and HER compared to pure Cu2ONPs and CuNPs in the carbon matrix. Interestingly, solvent used for fabricating different NPs electrode has also showed considerable influence on the electrocatalytic current density. The synthesized hybrid Cu-Cu2ONPS@C, Cu2ONPs@C and CuNPs@C was characterized using powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscope (HR-TEM) and BET. To the best of our knowledge, the fabricated hybrid Cu-Cu2ONPs@C exhibited strong bifunctional electrocatalytic response at considerably low onset and applied potential with low catalyst loading (0.1 mg) among the different Cu based nanostructured catalysts explored for water splitting reactions.

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Publication details

The article was received on 07 Oct 2017, accepted on 07 Jan 2018 and first published on 09 Jan 2018


Article type: Paper
DOI: 10.1039/C7CY02048A
Citation: Catal. Sci. Technol., 2018, Accepted Manuscript
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    Strong Bifunctional Electrocatalytic Active Hybrid Cu-Cu2O Nanoparticles Fabrication in Carbon Matrix and Comparing Activity with Pure Cu2O and Cu Nanoparticles

    P. Muthukumar, V. K. Vadivel, R. K. R. Gajjala, S. K. P and P. P. Anthony, Catal. Sci. Technol., 2018, Accepted Manuscript , DOI: 10.1039/C7CY02048A

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