Silica-Supported Au-Ag Catalysts for the Selective Hydrogenation of Butadiene

ChemCatChem
Nazila MasoudPetra E de Jongh

Abstract

Gold and silver are miscible over the entire composition range, and form an attractive combination for fundamental studies on bimetallic catalysts. Au-Ag catalysts have shown synergistic effects for different oxidation and liquid-phase hydrogenation reactions, but have rarely been studied for gas-phase hydrogenation. In this study 3 nm particles of Au, Ag and Au-Ag supported on silica (SBA-15) were investigated as catalysts for selective hydrogenation of butadiene in an excess of propene. The Au catalyst was over an order of magnitude more active than the Ag catalyst at 120 °C. The initial activity of the Au-Ag catalysts scaled linearly with the Au-content, suggesting a direct correlation between the surface and overall compositions of the nanoparticles and the absence of synergistic effects. All Au-containing catalysts were highly selective to butenes (>99.9 %). The Au catalysts were stable, whereas the Au-Ag catalysts lost about half of their activity during 20 h run time at 200 °C, but the initial activity was restored by a consecutive oxidation-reduction treatment. Near ambient pressure x-ray photoelectron spectroscopy showed that exposure to H2 at elevated temperatures led to a gradual enrichment of the surface of the Au-A...Continue Reading

References

Mar 7, 2002·Journal of the American Chemical Society·Kimberly DickDan Meisel
Nov 4, 2004·Journal of the American Chemical Society·Abdelhamid SayariYong Yang
Jul 21, 2006·The Journal of Physical Chemistry. B·Jun-Hong LiuChung-Yuan Mou
Jul 21, 2006·The Journal of Physical Chemistry. B·Ai-Qin WangChung-Yuan Mou
Jul 7, 2007·Physical Chemistry Chemical Physics : PCCP·Michael BronPeter Claus
Jul 27, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Blaise BridierJavier Pérez-Ramírez
Jan 11, 2011·Journal of the American Chemical Society·Hai-Long JiangQiang Xu
Jan 18, 2011·Chemical Reviews·Michael B Cortie, Andrew M McDonagh
Aug 28, 2012·Chemical Reviews·Weiting YuJingguang G Chen
Aug 9, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Yu ChenTingmei Wang
Apr 24, 2014·Physical Chemistry Chemical Physics : PCCP·A L GouldC R A Catlow
Jul 23, 2014·Physical Chemistry Chemical Physics : PCCP·Laurent DelannoyCatherine Louis
Oct 10, 2015·Nature Communications·Felicia R LucciE Charles H Sykes
Feb 9, 2017·Nanoscale·Wiebke AlbrechtAlfons van Blaaderen

❮ Previous
Next ❯

Citations

Oct 22, 2019·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Antony RajendranWen-Ying Li
Apr 15, 2020·Nanoscale·Priyanka VermaHiromi Yamashita
Jan 26, 2021·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Giorgio TotarellaPetra E de Jongh
Jul 17, 2018·ACS Nano·Jessi E S van der HoevenPetra E de Jongh

❮ Previous
Next ❯

Methods Mentioned

BETA
surface plasmon resonance
transmission electron microscopy

Software Mentioned

Casa XPS

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.