Related Experiment Video
Updated: Mar 18, 2026
Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether
Published on: August 17, 2019
CO2 Activation and Hydrogenation by PtHn (-) Cluster Anions
Xinxing Zhang1, Gaoxiang Liu1, Karl-Heinz Meiwes-Broer2
1Department of Chemistry, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD, 21218, USA.
Platinum hydride cluster anions react with carbon dioxide, forming PtCO2H(-) and PtCO2H3(-). The hydrogenation of CO2 by platinum hydride clusters is energetically favorable, indicating potential catalytic applications.
Area of Science:
- Inorganic Chemistry
- Physical Chemistry
- Computational Chemistry
Background:
- Platinum hydride cluster anions (PtHn(-)) are relevant in catalysis.
- Carbon dioxide (CO2) activation is a key challenge in chemistry.
Purpose of the Study:
- To investigate the gas-phase reaction pathways between PtHn(-) cluster anions and CO2.
- To elucidate the structures of the reaction products.
- To determine the energetic favorability of CO2 hydrogenation by PtHn(-).
Main Methods:
- Mass spectrometry was used to identify reaction products.
- Anion photoelectron spectroscopy provided insights into electronic structure.
- Computational studies modeled reaction pathways and energetics.
Main Results:
- Two primary products were observed: PtCO2H(-) and PtCO2H3(-).
- The structure of PtCO2H(-) was determined to be HPtCO2(-).
- The structure of PtCO2H3(-) was identified as H2Pt(HCO2)(-).
- Computational analysis revealed that CO2 hydrogenation by PtH3(-) is highly energetically favorable.
Conclusions:
- The reaction of PtHn(-) with CO2 yields distinct platinum-containing products.
- The observed product structures provide insights into reaction mechanisms.
- The energetic favorability suggests potential for platinum hydride clusters in CO2 reduction catalysis.
More Related Videos
12:08Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
Published on: June 24, 2022
10:19Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
Published on: July 18, 2017
Related Concept Videos
02:13Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
01:26Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...
01:17Thermal Electrocyclic Reactions: Stereochemistry
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
02:47Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.