Tetrahexahedral Pt Nanoparticles: Comparing the Oxygen Reduction Reaction under Transient vs Steady-State Conditions
Publisher DOI
Abstract
In this work, we have synthesized tetrahexahedral (THH) Pt nanoparticles (NPs) enclosed with {730} high-index facets using a one-step square wave potential procedure. The catalytic activity of the THH NPs toward the oxygen reduction reaction (ORR) is studied under both transient and steady-state conditions. As a benchmark, the ORR activity is compared with those of polycrystalline Pt and a commercial Pt/C catalyst. The results show that, under transient conditions, the catalytic performance of the THH Pt NPs and Pt/C are approximately the same and about 2 times lower than that of polycrystalline Pt. However, under steady-state conditions the THH Pt NPs perform considerably better than Pt/C. Under steadystate conditions THH Pt NPs are even slightly more active than polycrystalline Pt.
Date Issued
2017
Publication Type
Article
Subject(s)
Subjects
thh pt nanoparticles oxygen reduction reaction steady-state conditions high-index facets shape-controlled synthesis deep eutectic solvents automotive fuel-cells platinum nanocrystals alloy electrocatalysts anisotropic growth alkaline-solution pemfc catalysts pt-catalysts
Language(s)
en
Additional Credits
Journal
ACS Catalysis
Publisher
American Chemical Society
ISSN
2155-5435
Related URL(s)
https://pubs.acs.org/doi/10.1021/acscatal.6b02201
Access(Rights)
restricted