Related Experiment Video
Updated: Jul 12, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
Published on: March 29, 2016
Effect of Traces of Large Molecules Containing Nitrogen on Hydrogen Overvoltage
Abstract:
Organic amines, present in very small concentrations (below 10(-6) M) in 0.1N H(2)SO(4), cause a significant increase in hydrogen overvoltage, the effect being stronger the higher the molecular weight. The increase could be accounted for by the usual site-blockage concept. In the case of egg albumin, a drastic increase of over 300 mv was observed at 12.5 ma/cm(2) for a concentration of only 0.01 part per million. A new mechanism is proposed in which the dielectric constant and hydrogen-ion activity are believed to be depressed in a region twice as thick as the usual transition region.
Related Concept Videos
Free Energy Changes for Nonstandard States
Hydrogen Bonds
Hydrogen Bonds
¹H NMR of Labile Protons: Deuterium (²H) Substitution
Inductive Effects on Chemical Shift: Overview
π Electron Effects on Chemical Shift: Overview
