Spongy metallic nanoparticles adopting a 3D solid/void bicontinuous architecture exhibit a unique set of structural characteristics, such as large surface-to-volume ratios, easily accessible open surfaces, highly abundant surface active sites, conductive skeletal frameworks, tailorable surface atomic configurations, and tunable surface compositions, all of which are highly desired for optimization of catalysis and electrocatalysis. Here I will talk about a versatile wet chemistry approach we recently developed through which AuCu<sub>3</sub> alloy nanoparticles controllably transform into spongy Au-Cu-Pt trimetallic nanoparticles, each of which is composed of a 3D network of sub-5 nm ultrathin ligaments covered with a sub-nanometer-thick Au-Pt alloy skin. The precise structural control of the spongy trimetallic nanoparticles relies on our capability to judiciously manipulate the interplay between the Cu-Pt galvanic exchange and the oxidative etching of Cu. Success in structure-controlled nanoparticle synthesis further allows us to develop detailed understanding of the structure-composition-property relationships underpinning the intriguing electrocatalytic and enzyme-mimicking behaviors of the spongy trimetallic nanonanoparticles using electro-oxidation of liquid alcohols and oxidation of 3,3′,5,5′-tetramethylbenzidine as model electrocatalytic and catalytic reactions.

Mesoporous multimetallic nanocatalysts composed of ultrathin nanoligaments covered with Au-Pt alloy skins

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.