Tracking Electrical Fields at the Pt/H₂O Interface during Hydrogen Catalysis
Name
jacs.9b05148.pdf
Description
Published version
Size
1.47 MB
Format
Adobe PDF
Checksum (MD5)
a8ad2a6a012b5ec5c52bd4dcff39572d
Author(s)
Ryu, Jaeyune
Surendranath, Yogesh
Date Issued
August 2019
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Citation
Ryu, Jaeyune and Yogesh Surendranath. "Tracking Electrical Fields at the Pt/H₂O Interface during Hydrogen Catalysis." © 2019 American Chemical Society
Version
Final published version
Abstract
We quantify changes in the magnitude of the interfacial electric field under the conditions of H₂/H⁺ catalysis at a Pt surface. We track the product distribution of a local pH-sensitive, surface-catalyzed nonfaradaic reaction, H₂ addition to cis-2-butene-1,4-diol to form n-butanol and 1,4-butanediol, to quantify the concentration of solvated H⁺ at a Pt surface that is constantly held at the reversible hydrogen electrode potential. By tracking the surface H⁺ concentration across a wide range of pH and ionic strengths, we directly quantify the magnitude of the electrostatic potential drop at the Pt/solution interface and establish that it increases by ∼60 mV per unit increase in pH. These results provide direct insight into the electric field environment at the Pt surface and highlight the dramatically amplified field existent under alkaline vs acidic conditions.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1021/jacs.9b05148
