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Abstract <p>In this study, surface-oxidized copper nanoparticles were synthesized through a time and energy-efficient solid-state self-propagating combustion (SSPC) reaction by making use of sodium borohydride (NaBH<sub>4</sub>) and calcium carbonate (Cu<sub>2</sub>(CO<sub>3</sub>)(OH)<sub>2</sub>). The microstructure, phase composition, and crystalline structure were examined using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) studies. XRD and XPS analyses confirmed the formation of crystalline copper (Cu) and Cu<sub>2</sub>O. The percentages of Cu<sub>2</sub>O and Cu were calculated to be 13 and 87%, respectively; based on the XRD peak profile. TEM studies confirmed that the Cu nanoparticles (CuNPs) were surface oxidized with a Cu<sub>2</sub>O layer of thickness 3–5 nm. Electrochemical studies using a three-electrode setup in a 1 M KOH aqueous solution demonstrated a specific capacitance of 144.44 F/g at 0.15 A/g.</p>

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Solid-State Self-Propagating Combustion Synthesis of Surface Oxidized Copper Nanoparticles and Specific Capacitance Studies

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • R. Sudarshana,
  • R. Sambasivam,
  • M. Prakash,
  • B. Divyashree,
  • R. Balan

摘要

Abstract

In this study, surface-oxidized copper nanoparticles were synthesized through a time and energy-efficient solid-state self-propagating combustion (SSPC) reaction by making use of sodium borohydride (NaBH4) and calcium carbonate (Cu2(CO3)(OH)2). The microstructure, phase composition, and crystalline structure were examined using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) studies. XRD and XPS analyses confirmed the formation of crystalline copper (Cu) and Cu2O. The percentages of Cu2O and Cu were calculated to be 13 and 87%, respectively; based on the XRD peak profile. TEM studies confirmed that the Cu nanoparticles (CuNPs) were surface oxidized with a Cu2O layer of thickness 3–5 nm. Electrochemical studies using a three-electrode setup in a 1 M KOH aqueous solution demonstrated a specific capacitance of 144.44 F/g at 0.15 A/g.