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Synthesis of α-MoC1-x Nanoparticles with a Surface-Modified SBA-15 Hard Template: Determination of Structure-Function Relationships in Acetic Acid Deoxygenation

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [1];  [1];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States). National Bioenergy Center

Surface modification of mesoporous SBA-15 silica generated a hydrophobic environment for a molybdenum diamine (Mo-diamine) precursor solution, enabling direct growth of isolated 1.9 ± 0.4 nm α-MoC1-x nanoparticles (NPs) inside the pores of the support. The resulting NP catalysts are bifunctional, and compared to bulk α-MoC1-x and β-Mo2C, the NPs exhibit a greater acid-site:H-site ratio and a fraction of stronger acid sites. The greater acid-site:H-site ratio results in higher decarbonylation (DCO) selectivity during acetic acid hydrodeoxygenation (HDO) reactions, and the stronger acid sites lead to higher activity and ketonization (KET) selectivity at high temperatures. Lastly, the hard-templating synthetic method could be a versatile route toward carbide NPs of varying size, composition, and phase, on a range of mesoporous oxide supports.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1274095
Report Number(s):
NREL/JA--5100-66185
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 31 Vol. 55; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (33)

Multiple Phases of Molybdenum Carbide as Electrocatalysts for the Hydrogen Evolution Reaction journal May 2014
Multiple Phases of Molybdenum Carbide as Electrocatalysts for the Hydrogen Evolution Reaction journal May 2014
Conceptual Process Design and Techno-Economic Assessment of Ex Situ Catalytic Fast Pyrolysis of Biomass: A Fixed Bed Reactor Implementation Scenario for Future Feasibility journal October 2015
Compounds of molybdenum and tungsten with high specific surface area journal October 1985
Compounds of molybdenum and tungsten with high specific surface area journal October 1985
Preparation and catalytic properties of transition metal carbides and nitrides journal June 1992
Preparation and catalytic properties of transition metal carbides and nitrides journal June 1992
Acetone condensation over molybdenum nitride and carbide catalysts journal June 2004
Catalytic performances of platinum doped molybdenum carbide for simultaneous hydrodenitrogenation and hydrodesulfurization journal January 2007
Selective vapor-phase hydrodeoxygenation of anisole to benzene on molybdenum carbide catalysts journal November 2014
Structure and site evolution of molybdenum carbide catalysts upon exposure to oxygen journal June 2015
Controlled synthesis of highly dispersed TiO2 nanoparticles using SBA-15 as hard template journal December 2006
Silver nanoparticles synthesized from mesoporous Ag/SBA-15 composites journal May 2005
Growth of Gd2O3 nanoparticles inside mesoporous silica frameworks journal March 2013
Thermal decomposition (pyrolysis) of urea in an open reaction vessel journal December 2004
A Facile Molecular Precursor Route to Metal Phosphide Nanoparticles and Their Evaluation as Hydrodeoxygenation Catalysts journal November 2015
Chemical Titration and Transient Kinetic Studies of Site Requirements in Mo 2 C-Catalyzed Vapor Phase Anisole Hydrodeoxygenation journal June 2015
Experimental and Computational Investigation of Acetic Acid Deoxygenation over Oxophilic Molybdenum Carbide: Surface Chemistry and Active Site Identity journal January 2016
Acetone Hydrodeoxygenation over Bifunctional Metallic–Acidic Molybdenum Carbide Catalysts journal January 2016
Metal Nitride and Metal Carbide Nanoparticles by a Soft Urea Pathway journal November 2009
Urea and Urea Nitrate Decomposition Pathways:  A Quantum Chemistry Study journal March 2006
“Nanocasting”:  Using SBA-15 Silicas as Hard Templates to Obtain Ultrasmall Monodispersed γ-Fe 2 O 3 Nanoparticles journal December 2006
Influence of Surface Modification of Ti−SBA15 Catalysts on the Epoxidation Mechanism for Cyclohexene with Aqueous Hydrogen Peroxide journal October 2005
Synthesis of Mo and W Carbide and Nitride Nanoparticles via a Simple “Urea Glass” Route journal December 2008
Nanostructured materials for applications in heterogeneous catalysis journal January 2013
Tungsten carbides as selective deoxygenation catalysts: experimental and computational studies of converting C3 oxygenates to propene journal January 2014
Recent advances in heterogeneous catalysts for bio-oil upgrading via “ex situ catalytic fast pyrolysis”: catalyst development through the study of model compounds journal January 2014
Structure–performance relations of molybdenum- and tungsten carbide catalysts for deoxygenation journal January 2015
Nanostructured materials for applications in heterogeneous catalysis journal January 2013
Crystal structure and morphology control of molybdenum carbide nanomaterials synthesized from an amine–metal oxide composite journal January 2013
Tungsten carbides as selective deoxygenation catalysts: experimental and computational studies of converting C3 oxygenates to propene journal January 2014
Recent advances in heterogeneous catalysts for bio-oil upgrading via “ex situ catalytic fast pyrolysis”: catalyst development through the study of model compounds journal January 2014
Structure–performance relations of molybdenum- and tungsten carbide catalysts for deoxygenation journal January 2015

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