|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bio Nano Interfaces and Engineering Applications
||D-1: Elucidation of Sequence-Dependent Structure/Function Relationships for Bimetallic CoPt Nanoparticles
||Hunter Jacobs, Nicholas Bedford
|On-Site Speaker (Planned)
Peptide-enabled synthesis of bimetallic nanocatalysts represents a means to tune surface stoichiometry and structure through peptide sequence manipulation. Unfortunately, there is limited information correlating peptide sequence to metal affinity and particle structure. In this presentation, sequence-dependent catalytic properties of peptide-enabled CoPt nanocatalytsts are determined using synchrotron X-ray characterization techniques. Peptide-enabled CoPt nanocatalysts exhibit sequence dependent catalytic properties for methanol oxidation in alkaline environments. High-energy X-ray diffraction (HE-XRD) coupled with atomic pair distribution function (PDF) analysis and extended X-ray absorption fine-structure spectroscopy (EXAFS) were used to uncover these differences in surface structural disorder and stoichiometry. Nanoparticle configurations were then determined directly from experimental data using reverse Monte Carlo methods, which provided nanoparticle configurations based solely from the experimental data. This information is used to explain catalytic properties, which can potentially lead to the development of rational sequence design rules for the creation of nanocatalysts with enhanced properties.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)