A facile and surfactant-free route for nanomanufacturing of tailored ternary nanoalloys as superior oxygen reduction reaction electrocatalysts

Abstract

Laser ablation synthesis in solution-galvanic replacement reaction (LASiS-GRR) enables tuning of elemental ratios and bonding properties for Pt based ternary nanoalloys as ORR electrocatalysts.

Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

“…Yet, based on the recent laser‐based methods, defined bimetallic nanoparticle ultra‐structures are already accessible for catalytic studies to date . Figure summarizes the main types of bimetallic nanostructures together with corresponding laser‐generated exemplary nanomaterials available amongst others.…”

“… Scheme summarizing different classes of multi‐metallic nanostructures as well as corresponding examples of laser‐generated nanomaterials. In the 3 rd row TEM‐EDX pictures are shown for AgAu (fundamentals), NiMo (electrocatalysis), PtCo (electrocatalysis), AuFe (fundamentals [58] , reduction reactions), AgCu (fundamentals [202] , enamination reaction) and PtCuCo (electrocatalysis). TEM‐EDX picture of AgAu adapted with permission from Ref.…”

“…While the particles are formed from the superheated metal plume at the plume‐water interface and ripen further inside the cavitation bubble, a redox reaction is most likely initiated between nanoparticle seeds and metal ions during laser ablation resulting in the formation of alloy NPs. This intended redox reaction harvesting dissolved precursor‐salt ions as nanoparticle constituents are categorized as Reactive Laser Ablation in Liquids (RLAL) …”

One-step femtosecond laser ablation synthesis of sub-3 nm gold nanoparticles stabilized by silica

“…Recently, the approaches of PLAL and laser photochemical reduction have been combined into a single process through ablation of a solid target either immersed in or subsequently exposed to metal salt solution, in what is termed reactive laser ablation in liquid (RLAL) [10,[45][46][47][48][49][50][51][52]. RLAL has been widely used to generate metal-silica nanostructures, including Si/M (M = Ag, Au, Pd, Pt) core/shell NPs [47], Ag-core/silica-shell NPs [48], and large silica particles decorated with Au or Ag NPs [49].…”

Recent Advances in Surfactant‐Free, Surface‐Charged, and Defect‐Rich Catalysts Developed by Laser Ablation and Processing in Liquids

“…[11] The group of Ma also developed CO 2 -switchable polymer conjugated gold catalysts by ex situ conjugation;the catalystsc ould be easily recycled after 4-nitrophenol reduction. [12] The second appealing advantage of the LSPC technique for catalytic applications is the one-step convenients ynthesis of bi-(core-shell, intermetallic/alloyed structures, and heterostructure) [5] and trimetallic NPs, [13] which are alwaysd ifficult to obtain by conventionalm ethods. [14] Synergistic effectso fL ALsynthesized nanoalloys have been confirmed by nickel-molybdenum and gold-iron NPs for the oxygen evolution reaction (OER), [15] copper-nickel NPs for photocatalytic hydrogen evolution, [16] and gold-platinum NPs for both 4-nitrophenol reduction [17] and electro-oxidationo f ascorbic acid.…”