Atmospheric microplasma based binary Pt₃Co nanoflowers synthesis

Abstract

The atmospheric microplasma in the gas-liquid phase technique serves as a new potential efficient and green catalyst preparation technique to fabricate nanomaterials. Due to the presence of diverse reactive species, this technique can promote rapid complex reactions in solutions, which are typically sluggish in traditional chemical processes. Here, atmospheric microplasma induced liquid chemistry (AMILC) is applied to fabricate three-dimensional (3D) binary Pt3Co nanoflowers. Nano-architectures of Pt3Co bimetals (2D nanosheets and 3D nanoflowers) can be formed by tuning the initial cobalt molar concentration in the solution. 3D nanoflowers show a ‘nano-bouquet’ like nanostructure with Co-oxide forming leaves and Pt3Co forming waxberries. 3D nanoflowers show promising electrocatalytic behavior towards ethanol and glucose sensing in alkaline condition. Additionally, AMILC takes less synthesis duration (~10 min) without hazardous chemicals for Pt3Co bimetal nanostructure preparation compared to conventional chemical approaches (>2 h), indicating that AMILC is a potential candidate with better energy efficiency, lower carbon footprint and green plasma chemistry process for 3D nanostructure material synthesis in catalyst applications.

Recent advances in nanoflowers: compositional and structural diversification for potential applications

“…Alloy nanoflowers are a recent research topic, with publications dating back to only 10 years; approximately 20–30 studies have been reported on Au-, Pt-, Pd-, Ni-, Mo-, and Ir-based alloy nanoflowers. The nanoflowers have been synthesized by various reduction methods, 341,342,354,355,361 the AMILC method, 352 solvothermal methods, 70,350,353,360 and so on. 115,116,336,357 Alloy nanoflowers primarily exhibit potential applications as electrocatalysts for water splitting and fuel cells (Tables 15–17) due to their alloy and synergistic effects.…”

“…A novel atmospheric microplasma induced liquid chemistry (AMILC) method has been applied for the controlled synthesis of 2D and 3D binary Pt 3 Co nanoflowers by Wang et al 352 As shown in the atmospheric microplasma (AMP) setup in Fig. 14 , the electrolyte consists of 0.002 M chloroplatinic acid hydrate (H 2 PtCl 6 · x H 2 O), 0.5 M sodium sulfate (Na 2 SO 4 ), and variable molar concentrations of cobalt( ii ) sulfate heptahydrate (CoSO 4 ·7H 2 O) dissolved in distilled water (40 mL).…”

“…Surface-clean Au nanoowers and spherical Au-Ag nanoparticles of almost the same size and Au/Ag ratio exhibit lower rates for the oxidation of acetophenone than bimetallic nanoowers. A novel atmospheric microplasma induced liquid chemistry (AMILC) method has been applied for the controlled synthesis of 2D and 3D binary Pt 3 Co nanoowers by Wang et al 352 As shown in the atmospheric microplasma (AMP) setup in Fig. 14 substrate, half-inserted in the aqueous electrolyte and separated by at least 3 cm from the anodic capillary.…”