4.8 Article

Preparation, Quantification, and Reaction of Pd Hydrides on Pd/ Al2O3 in Liquid Environment

Related references

Note: Only part of the references are listed.
Article Chemistry, Physical

Gas phase vs. liquid phase: monitoring H2 and CO adsorption phenomena on Pt/Al2O3 by IR spectroscopy

Michele Carosso et al.

Summary: This study thoroughly investigated the adsorption phenomena occurring at the surface of a highly-dispersed Pt/Al2O3 catalyst for hydrogenation reactions using transmission IR spectroscopy in the gas-phase and ATR-IR spectroscopy in the liquid-phase. The presence of a selected solvent greatly affected the reducibility of Pt and competed with the adsorbates for the occupancy of surface sites, affecting the shape, position, and intensity of the infrared signals corresponding to the surface Pt-H and Pt-CO species.

CATALYSIS SCIENCE & TECHNOLOGY (2022)

Review Chemistry, Physical

Heterolytic Dissociation of H2 in Heterogeneous Catalysis

Divakar R. Aireddy et al.

Summary: In this review, the authors summarize the structural features of heterogeneous, homogeneous, and enzyme catalysts in the heterolytic dissociation of H2. The energy barriers and kinetic contributions of heterolytic and homolytic H2 dissociation pathways in heterogeneous catalytic systems are discussed, and the spectroscopic evidence of the heterolytic H2 dissociation pathways is critically reviewed.

ACS CATALYSIS (2022)

Article Chemistry, Physical

Interplay between Surface-Adsorbed CO and Bulk Pd Hydride under CO2-Electroreduction Conditions

Justus S. Diercks et al.

Summary: Palladium is an electrocatalyst that can selectively generate carbon monoxide or formate at high and low overpotentials, respectively. Previous studies have been inconclusive about palladium's ability to form a hydride phase and its effect on CO2 reduction reaction (CO2RR) selectivity. This study used electrochemical measurements and in situ X-ray absorption spectroscopy to reveal the strong influence of adsorbed CO on the formation rate of Pd-hydride, and confirmed the complete formation of beta-phase PdHx at all applied potentials under CO2RR conditions.

ACS CATALYSIS (2022)

Article Chemistry, Physical

Reduction of PdO/Al2O3 in Liquid Cyclohexane Followed In Situ by ATR-IR, High-Energy XRD, and XAS

Thibault Fovanna et al.

Summary: Supported Pd-based catalysts in heterogeneously catalyzed liquid phase processes are often activated through reduction before reaction. In this study, an oxidized Pd/Al2O3 catalyst was reduced in H-2-saturated cyclohexane, and the reduction process was monitored in real time using ATR-IR, XRD, and XAS to obtain insights from different materials properties. The results indicate that dynamic changes in Pd speciation can be observed during reduction in the liquid phase, with XRD suggesting a dominant Pd hydride phase at the end, while XAS reveals an equal proportion of Pd-0 and Pd hydride. The presence of a mixed Pd-0/PdHx phase is important for hydrogenation reactions.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

Article Instruments & Instrumentation

ProQEXAFS: a highly optimized parallelized rapid processing software for QEXAFS data

Adam H. Clark et al.

JOURNAL OF SYNCHROTRON RADIATION (2020)

Article Engineering, Environmental

Design of a Reactor Cell for Modulated Excitation Raman and Diffuse Reflectance Studies of Selective Catalytic Reduction Catalysts

Rob Jeremiah G. Nuguid et al.

EMISSION CONTROL SCIENCE AND TECHNOLOGY (2019)

Article Chemistry, Physical

Characterization of the Platinum-Hydrogen Bond by Surface-Sensitive Time-Resolved Infrared Spectroscopy

David Palecek et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2018)

Article Chemistry, Physical

High energy X-ray diffraction and IR spectroscopy of Pt/Al2O3 during CO oxidation in a novel catalytic reactor cell

Valentina Marchionni et al.

CATALYSIS STRUCTURE & REACTIVITY (2017)

Review Chemistry, Multidisciplinary

Furfural: a renewable and versatile platform molecule for the synthesis of chemicals and fuels

R. Mariscal et al.

ENERGY & ENVIRONMENTAL SCIENCE (2016)

Article Automation & Control Systems

MCR-ALS GUI 2.0: New features and applications

Joaquim Jaumot et al.

CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS (2015)

Article Chemistry, Physical

Determination of Nanoparticle Size by Measuring the Metal-Metal Bond Length: The Case of Palladium Hydride

Jianqiang Wang et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2015)

Article Chemistry, Physical

State of Supported Pd during Catalysis in Water

Zizwe A. Chase et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2013)

Proceedings Paper Physics, Condensed Matter

The Role of Hydrogen in Formation of Pd XANES in Pd-Nanoparticles

A. L. Bugaev et al.

15TH INTERNATIONAL CONFERENCE ON X-RAY ABSORPTION FINE STRUCTURE (XAFS15) (2013)

Article Chemistry, Physical

Interplay between carbon monoxide, hydrides, and carbides in selective alkyne hydrogenation on palladium

Monica Garcia-Mota et al.

JOURNAL OF CATALYSIS (2010)

Article Chemistry, Physical

Density functional theory study of benzene adsorption on small pd and pt clusters

Mauri Cio T. De M. Cruz et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2007)

Review Chemistry, Physical

Metal hydride materials for solid hydrogen storage: A review

Billur Sakintuna et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2007)

Article Chemistry, Physical

Factors influencing hydride formation in a Pd/TiO2 catalyst

Jacinto Sa et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2006)

Review Chemistry, Physical

Review of absorption and adsorption in the hydrogen-palladium system

Linda L. Jewell et al.

APPLIED CATALYSIS A-GENERAL (2006)

Article Chemistry, Physical

Theoretical and spectroscopic study of the effect of ring substitution on the adsorption of anisole on platinum

Norberto Bonalumi et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2006)

Article Instruments & Instrumentation

ATHENA, ARTEMIS, HEPHAESTUS:: data analysis for X-ray absorption spectroscopy using IFEFFIT

B Ravel et al.

JOURNAL OF SYNCHROTRON RADIATION (2005)

Article Chemistry, Physical

Hydrogen storage in spherical and platelet palladium nanoparticles

S Kishore et al.

JOURNAL OF ALLOYS AND COMPOUNDS (2005)