ABSTRACT

The current work reports the synthesis, analytical evaluation, and electrochemical performance investigation of green bio-factories’ triggered mixed metal oxides’ nano-hybrids comprising of nickel (Ni) and zinc (Zn) for the first time. Modified sol–gel synthetic route used for the synthesis of NiO/ZnO green nano-hybrids ([NiO/ZnO]-GNH) is devoid of utilization of any chemical-reducing agents. Efficient [NiO/ZnO]-GNH electro-catalysts were characterized for various aspects using Fourier transform infra-red spectroscopy (FT-IR), gas chromatography and mass spectrometry (GC-MS), energy-dispersive X-ray spectroscopy (EDX), field emission scanning electron micrographs (FE-SEM), UV-Visible spectrophotometry (UV-Vis), and X-ray photoelectron spectroscopy (XPS). Oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) steps of water splitting reactions were evaluated via linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) via fabrication of modified Ni-foam electrode through decoration of [NiO/ZnO]-GNH. The as-synthesized [NiO/ZnO]-GNH promises electro-catalytic performance with a small over-potential of 0.42 V and 264 mV for OER and HER, respectively, for the achievement of a current density of 10 mA/cm². Results of the current work can be extended to the practical scale adoption of the fabricated electro-catalysts through optimized investigation and economical evaluation for the consolidation of environmental sustainability and green energy production.

摘要

当前的工作首次报道了绿色生物工厂触发的由镍（Ni）和锌（Zn）组成的混合金属氧化物的纳米杂化物的合成，分析评估和电化学性能研究。用于合成NiO / ZnO绿色纳米杂化物（[NiO / ZnO] -GNH）的改良溶胶-凝胶合成路线没有使用任何化学还原剂。使用傅立叶变换红外光谱（FT-IR），气相色谱和质谱（GC-MS），能量色散X射线光谱（EDX）对高效[NiO / ZnO] -GNH电催化剂的各个方面进行了表征。 ，场发射扫描电子显微照片（FE-SEM），紫外可见分光光度法（UV-Vis）和X射线光电子能谱（XPS）。通过修饰[NiO / ZnO]修饰的镍泡沫电极的制造，通过线性扫描伏安法（LSV）和电化学阻抗谱（EIS）评估了水分解反应的氧析出反应（OER）和氢析出反应（HER）步骤。 -GNH。合成后的[NiO / ZnO] -GNH有望实现电催化性能，OER和HER的过电位分别为0.42 V和264 mV，以实现10 mA / cm的电流密度²。通过优化调查和经济评估以巩固环境可持续性和绿色能源生产，当前工作的结果可以扩展到实际制造的电子催化剂的规模。