Related Experiment Video
Updated: Dec 9, 2025

Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
A Laser-Activated Membrane Introduction Mass Spectrometry Study of Proton Spillover Promoted Alkane Dehydrogenation
Ryan Yongtae Kim1, Harry Rivera2, Sara E Evarts3
1Department of Chemical and Environmental Engineering, Illinois Institute of Technology, Chicago, Illinois 60616, United States.
Abstract:
Operando high-throughput evaluation of heterogeneous catalysts by laser-activated membrane introduction mass spectrometry (LAMIMS) elucidates the Pt loading dependence of methylcyclohexane dehydrogenation on platinized γ-alumina beads. A CO2 marking laser rapidly and sequentially heats catalyst beads positioned on a heat-dissipating carbon paper support that overlays a silicone membrane, separating the bead library reaction zone from a quadrupole mass analyzer. The toluene m/z peak varies logarithmically with Pt loading, suggesting that reactivity includes factors that are negatively correlated to Pt loading. These factors may include the Pt/γ-Al2O3 surface interfacial region as one component of a heterogeneous catalytically active surface area/mass. This work demonstrates LAMIMS as a broadly applicable high-throughput operando screening method for heterogeneous catalysts.
Related Concept Videos
Mass Spectrometry: Long-Chain Alkane Fragmentation
Mass Spectrometry: Branched Alkane Fragmentation
Mass Spectrometry: Molecular Fragmentation Overview
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can occur at...
Mass Spectrometry: Alkene Fragmentation
Chemical Ionization (CI) Mass Spectrometry
Matrix-Assisted Laser Desorption Ionization (MALDI)
The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix material. The...

