Hydrothermal growth of mesoporous SBA-15 silica in the presence of PVP-stabilized Pt nanoparticles: synthesis, characterization, and catalytic properties

Journal of the American Chemical Society
Hyunjoon SongG A Somorjai

Abstract

A novel high surface area heterogeneous catalyst based on solution phase colloidal nanoparticle chemistry has been developed. Monodisperse platinum nanoparticles of 1.7-7.1 nm have been synthesized by alcohol reduction methods and incorporated into mesoporous SBA-15 silica during hydrothermal synthesis. Characterization of the Pt/SBA-15 catalysts suggests that Pt particles are located within the surfactant micelles during silica formation leading to their dispersion throughout the silica structure. After removal of the templating polymer from the nanoparticle surface, Pt particle sizes were determined from monolayer gas adsorption measurements. Infrared studies of CO adsorption revealed that CO exclusively adsorbs to atop sites and red-shifts as the particle size decreases suggesting surface roughness increases with decreasing particle size. Ethylene hydrogenation rates were invariant with particle size and consistent with a clean Pt surface. Ethane hydrogenolysis displayed significant structure sensitivity over the size range of 1-7 nm, while the apparent activation energy increased linearly up to a Pt particle size of approximately 4 nm and then remained constant. The observed rate dependence with particle size is attributed ...Continue Reading

References

Feb 12, 1996·Physical Review Letters· Schulze Icking-Konert GW Eberhardt
Mar 15, 2003·Science·Alexis T Bell
Oct 2, 2003·Chemical Communications : Chem Comm·Jeff GrunesGabor A Somorjai
Dec 4, 2003·Journal of the American Chemical Society·Huifang LangBert D Chandler
Mar 24, 2004·Angewandte Chemie·Robert Schlögl, Sharifah Bee Abd Hamid
Aug 13, 2004·Nature·Gabor A Somorjai
Jan 25, 2005·Nature Materials·Ronnie T VangFlemming Besenbacher
Jul 21, 2006·The Journal of Physical Chemistry. B·Hyunjoon SongPeidong Yang

❮ Previous
Next ❯

Citations

Aug 17, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Chih-Wei ChiuJiang-Jen Lin
Sep 27, 2008·Chemical Society Reviews·Gabor A Somorjai, Jeong Y Park
Feb 26, 2009·Chemical Communications : Chem Comm·Shao-Wei BianWei-Guo Song
Sep 8, 2010·Physical Chemistry Chemical Physics : PCCP·Anmin CaoGötz Veser
Oct 4, 2008·Proceedings of the National Academy of Sciences of the United States of America·Ilkeun LeeFrancisco Zaera
Jun 6, 2008·The Journal of Chemical Physics·Gabor A Somorjai, Jeong Y Park
Jan 18, 2014·Nature Communications·Haohong DuanYadong Li
Feb 20, 2016·ACS Applied Materials & Interfaces·Jialiang ZhangXiqun Jiang
Jan 21, 2015·Journal of Hazardous Materials·Zhenwei GaoXuefei Zhou
Mar 8, 2014·Environmental Technology·M A BarakatJ N Kuhn
May 13, 2017·Chemistry : a European Journal·Àngela RibesFélix Sancenón
Jul 30, 2014·Chemical Communications : Chem Comm·Abheek DattaSayan Bhattacharyya
May 7, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Feng LinSabine Van Doorslaer
Mar 5, 2015·Chemical Communications : Chem Comm·Chunyu ChenFeng-Shou Xiao
Nov 14, 2008·Angewandte Chemie·Gabor A Somorjai, Jeong Y Park
Jan 20, 2009·Nature Materials·Ilkeun LeeFrancisco Zaera
Jul 22, 2010·Nanoscale·Changlong JiangXiaogang Liu
Dec 10, 2009·ChemSusChem·Loredana De RogatisPaolo Fornasiero
Sep 10, 2013·ChemSusChem·Francisco Zaera
Sep 19, 2014·Physical Chemistry Chemical Physics : PCCP·Feng LinSabine Van Doorslaer
Mar 10, 2011·Nanoscale·Thomas K NielsenTorben R Jensen
Nov 30, 2012·Chemical Society Reviews·Hoi Ri MoonMyunghyun Paik Suh

❮ Previous
Next ❯

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.