One-step synthesis of Co3O4 nanoparticles/laser induced graphene composites in ambient condition for electrocatalytic OER reaction

• Published in: Carbon trends Vol. 12; p. 100285
• Main Authors: Li, Jiangli, Yu, Xue, Sun, Rongke, Li, Hao, Zhu, Xiaodong, Ma, Yanqing, Ma, Lei
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2023; Elsevier
• Subjects: Basswood; Co3O4 nanoparticles; Electrocatalysis; Graphene composites; Laser induced one-step synthesis; Oxygen evolution reaction; Laser induced one-step synthesis; Graphene composites; Electrocatalysis; Oxygen evolution reaction; Co3O4 nanoparticles; Basswood
• ISSN: 2667-0569; 2667-0569
• DOI: 10.1016/j.cartre.2023.100285

•A simple methodology for one-step synthesizing Co3O4 NPs/LIG was implemented.•Co3O4 NPs/LIG can be successfully prepared under environmental conditions.•Co3O4 NPs/LIG can be directly used as working electrode for electrochemical reactions without extra post-treatment.•The overpotential of Co3O4 NPs/LIG reaches 325 mV @ 10 mA·cm−2 in OER. In this paper, we report a successful one-step synthesis of Co3O4 Nanoparticles/Laser induced graphene (NPs/LIG) composite by using 1064 nm laser with irradiating cobalt salts impregnated basswood slices in air. The prepared Co3O4 NPs/LIG composites show uniformly distributed nanoparticles on the high-quality 3D graphene. It can be directly used as working electrode for electrochemical reactions without the need for extra post-treatment and exhibits remarkable performance for electrocatalytic OER reaction with an overvoltage of 325 mV at current density of 10 mA·cm−2 and Tafel slope of 66.63 mV·dec−1. Due to its great capability of fabrication precision, simplicity and high speed, this technique indicates immense potential in large scale electrochemical micro-sensor manufacture. A successful one-step synthesis of Co3O4 NPs/LIG composite by using laser with irradiating cobalt salts impregnated basswood slices in air. Co3O4 NPs/LIG can be directly used as working electrode for electrochemical reactions and the overpotential reaches 325mV @ 10 mA·cm−2 in OER. [Display omitted]