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Updated: Nov 16, 2025
Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
CO2 Activation and Hydrogenation by Palladium Hydride Cluster Anions
Gaoxiang Liu1, Zhaoguo Zhu1, Mary Marshall1
1Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States.
Abstract:
Mass spectrometric analysis of the anionic products of interaction between palladium hydride anions, PdH-, and carbon dioxide, CO2, in a reaction cell shows an efficient generation of the PdHCO2- intermediate and isolated formate product. Multiple isomers of the PdHCO2- intermediates are identified by a synergy between negative ion photoelectron spectroscopy and quantum-chemical calculations. It is shown that a direct mechanism, in which the H atom in PdH- directly activates and hydrogenates CO2, leads to the formation of the formate product. An indirect mechanism, on the other hand, leads to a stable HPdCO2- structure, where CO2 is chemisorbed onto the Pd atom.
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