Bimetallic nanoparticles can have a range of atomic structures, ranging from core-shell and Janus structures, to random alloy, and to intermetallic [1]. These structural types offer different catalytic and electrocatalytic properties. The needs for highly active and stable electrocatalysts for oxygen reduction and other critical reactions presents both new opportunities and challenges in the precision control of bond formation and connectivity of metals [1-3]. For instance, two immiscible metals in bulk not only form alloys but also intermetallic and regioselective nanostructures [2, 4-6]. In his presentation, I will present experimental studies to address issues that relate to the materials design of bimetallic catalysts through the controls of precursor types (i.e., metal salts and metalorganic frameworks (MOFs)) and the orderings of metal atoms in the products (i.e., intermetallic vs. random alloy) [7]. Both in situ and ex situ tools have been used in understanding the formations of higher ordered bimetallic structures [5, 6, 8]. Recent examples are provided for the catalyst designs targeted for the reductions of oxygen and carbon dioxide molecules [7, 9, 10].

Material design of intermetallic and other bimetallic nanostructures as oxygenated electrocatalysts

ACS Spring 2022

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