DEMS for Mechanistic Investigation of Electrocatalytic Reactions

Product details

At present, the detection of gas-phase or volatile products from electrochemical reactions mostly relies on steady-state polarization and chromatographic analysis. Steady-state polarization only reflects the total reaction current and cannot resolve individual stepwise reactions. For most electrochemical studies, in-situ investigations during potential sweeping or potential modulation are of greater research value. Differential Electrochemical Mass Spectrometry (DEMS) couples an electrochemical cell with a mass spectrometer. It enables millisecond time-resolved qualitative and quantitative analysis of species under potential sweep or potential modulation. Suitable for a wide range of electrocatalytic reactions, DEMS serves as an important tool for exploring electrochemical reaction mechanisms as well as rapid screening and evaluation of electrocatalysts.

Test Contents:

Real-time detection of gas-phase products (CO, CH₄, C₂H₄, CH₃OH, etc.) and measurement of relative Faradaic efficiency for CO₂ electroreduction
In-situ detection of intermediates and final products such as NO, N₂O, NH₂OH, NH₃, N₂ during nitrate electroreduction
¹⁸O isotopic labelling for OER in water electrolysis, confirmation of LOM or AEM reaction mechanisms
Real-time detection of intermediates and final products (HCHO, HCOOH, CO, etc.) of methanol electrooxidation and calculation of current efficiency for each product
Hydrogen isotope labelling for mechanistic investigation of hydrogen evolution reaction (HER)
Stability evaluation of carbon materials (detection of CO and CO₂ under high potentials)
Others (photocatalysis, photoelectrocatalysis, oxygen reduction, hydrogen oxidation, chlorine evolution, organic electrosynthesis, etc.)

Selected Customer Case Studies: