Stabilization of Exposed Metal Nanocrystals in High‐temperature Heterogeneous Catalysis

2021 ◽  
pp. 2108727
Author(s):  
Zhijie Zhu ◽  
Kai Feng ◽  
Chaoran Li ◽  
Rui Tang ◽  
Mengqi Xiao ◽  
...  
Keyword(s):  
High Temperature ◽  
Heterogeneous Catalysis ◽  
Metal Nanocrystals

scholarly journals High-temperature heterogeneous catalysis in platinum nanoparticle – molten salt suspensions

2020 ◽  
Vol 10 (3) ◽  
pp. 625-629
Author(s):  
Behzad Tangeysh ◽  
Clarke Palmer ◽  
Horia Metiu ◽  
Michael J. Gordon ◽  
Eric W. McFarland
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
High Temperature ◽  
Heterogeneous Catalysis ◽  
Co Oxidation ◽  
Molten Salt ◽  
Platinum Nanoparticles ◽  
Platinum Nanoparticle ◽  
Oxidation Activity

Suspensions of platinum nanoparticles (PtNPs) were formed in molten LiCl–LiBr–KBr via thermal decomposition of H2PtCl6, and subsequently evaluated for thermal stability and CO oxidation activity.

scholarly journals Hydrodeoxygenation Using Magnetic Induction: High‐Temperature Heterogeneous Catalysis in Solution

2019 ◽  
Vol 58 (33) ◽  
pp. 11306-11310 ◽  
Author(s):  
Juan M. Asensio ◽  
Ana B. Miguel ◽  
Pier‐Francesco Fazzini ◽  
Piet W. N. M. van Leeuwen ◽  
Bruno Chaudret
Keyword(s):  
High Temperature ◽  
Heterogeneous Catalysis ◽  
Magnetic Induction

CATALYTIC REQUIREMENTS FOR MIXED REACTANT FUEL CELLS

2008 ◽  
Vol 01 (02) ◽  
pp. 105-113 ◽  
Author(s):  
ILAN RIESS
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Heterogeneous Catalysis ◽  
Low Temperature ◽  
Electrode Materials ◽  
Catalytic Properties ◽  
Electrochemical Reactions ◽  
Direct Reaction ◽  
Oxygen Ions

Significant advantage could be achieved if mixed reactant fuel cells, MR-FC, were functioning. These cells are intended to operate on a mixture of air and fuel introduced into both the cathode and anode compartment. Symmetry is broken by using different electrode materials exhibiting special and different catalytic properties. No high temperature fuel cell was reported to date to function as a true MR-FC and only one, low temperature type, did function properly. We discuss the required catalytic properties which are unique in that they promote electrochemical reactions and suppress chemical ones as well as possible ways to search for them. The chemical reaction which has to be suppressed is the direct reaction of fuel and oxygen as the two components are premixed and the mixture is then introduced into the fuel cell at both electrode compartments. The electrochemical reactions that should be promoted are the reduction of oxygen at the cathode and the oxidation of fuel at the anode only by oxygen ions that emerge from the solid electrolyte. Conditions to promote this selectivity are discussed. These are derived from the theory of chemisorption as applied to heterogeneous catalysis.

Sum Frequency Laser Spectroscopy during Chemical Reactions on Surfaces

MRS Bulletin ◽  
2007 ◽  
Vol 32 (12) ◽  
pp. 1031-1037 ◽  
Author(s):  
Günther Rupprechter
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Heterogeneous Catalysis ◽  
Chemical Reactions ◽  
Powder Materials ◽  
Time Resolved ◽  
Elementary Processes ◽  
Technical Aspects ◽  
Sum Frequency ◽  
Frequency Laser

AbstractThe surface specificity of vibrational sum frequency generation (VSFG) spectroscopy allows one to characterize adsorbed and reacting molecules on catalyst surfaces while the catalyst functions at high pressure and high temperature. VSFG spectroscopy can be carried out in different modes, including scanning, broadband, time-resolved, and polarization-dependent, and has been applied to various active surfaces. Single-crystal and nanoparticle model catalysts have mostly been used, which are typically prepared under ultrahigh vacuum, but applications to powder materials have been reported recently. In this article, the fundamentals and technical aspects of VSFG are summarized, and its benefits are illustrated by case studies of elementary processes of heterogeneous catalysis.

scholarly journals Hydrodeoxygenation Using Magnetic Induction: High‐Temperature Heterogeneous Catalysis in Solution

2019 ◽  
Author(s):  
Juan M. Asensio ◽  
Ana B. Miguel ◽  
Pier‐Francesco Fazzini ◽  
Piet W. N. M. van Leeuwen ◽  
Bruno Chaudret
Keyword(s):  
High Temperature ◽  
Heterogeneous Catalysis ◽  
Magnetic Induction
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