Fabrication of Bimetallic Nanostructures via Aerosol-Assisted Electroless Silver Deposition for Catalytic CO Conversion

Abstract

Bimetallic nanostructures were fabricated via aerosol-assisted electroless silver deposition for catalytic CO conversion. An ambient spark discharge was employed to produce nanocatalysts, and the particles were directly deposited on a polytetrafluoroethylene substrate for initiating silver deposition to form Pd-Ag, Pt-Ag, Au-Ag bimetallic nanostructures as well as a pure Ag nanostructure. Kinetics and morphological evolutions in the silver deposition with different nanocatalysts were comparatively studied. The Pt catalyst displayed the highest catalytic activity for electroless silver deposition, followed by the order Pd > Au > Ag. Another catalytic activity of the fabricated bimetallic structures in the carbon monoxide conversion was further evaluated at low-temperature conditions. The bimetallic systems showed significantly higher catalytic activity than that from a pure Ag system.

Green manufacturing of metallic nanoparticles: a facile and universal approach to scaling up

“…25,28,29 This technique have focused on fabricating NPs using spark ablation (at low frequencies) for a number of new applications (Table S1). 3,6,7,19,25,29,[33][34][35][36][37][38]31,[39][40][41][42][43][44] Note that carrier gases and electrodes determine the particle composition. 25 Although manufacturing electrodes may not be particularly green, the use of recycled metals allows the green manufacturing of NPs.…”

Scalable and Environmentally Benign Process for Smart Textile Nanofinishing

“…Here, we propose a sustainable and universal approach to textile nanofinishing that relies on a single-step NP synthesis and deposition process. Among the various aerosol processes, electrical discharges allow the high-yield synthesis of a wide range of well-defined NPs [20][21][22][23][24][25] (with respect to NP concentration, size, 26,27 crystallinity, 28 and chemical composition 29,30 ) that can be directly deposited onto textile fibers by diffusion, in a green and universal manner. The uniqueness of the proposed process lies in that diffusional deposition can be easily integrated into textile nanofinishing while providing a controlled loading profile within the textiles.…”

Nanostructured platinum catalyst coating on diesel particulate filter with a low-cost electroless deposition approach

“…3(b) the number drops to 1.08% and 0.33%, respectively. The ratio (Pt/Ag in weight) from both cases remains quite constant, implying that the formation of Pt nanoparticles complies with a seed growth mechanism [28][29][30]. As aforementioned, the shape of nanostructured catalyst, from spheroid particle, rod-like wire to fern dendrite structure, can be simply mediated by starting reactant concentration and length of deposition time.…”