Abstract: One or more embodiments relate to stable catalysts prepared through the encapsulation of platinum particles inside an alumina framework. These catalysts do not sinter at 800° C. in the presence of oxygen and steam, conditions in which conventional catalysts sinter to large extents, while showing similar reaction rates. Extending this approach to Pd/Pt bimetallic catalysts leads to maintained small particle size at temperatures as high as 1,100° C. in air and steam. This strategy can be broadly applied to other metal and metal oxides for applications where sintering is a major cause of materials deactivation.

Abstract: Many embodiments provide the formation of active Pd sites upon steam treatment. Steam treatment of Pd catalysts can improve redox combustion reaction efficiencies. Several embodiments provide the formation of twin boundaries under steam treatment can improve catalytic activities of nanoparticle catalysts.

Abstract: Provided herein is a method of preparing a porous composite ceramic material and a porous composite ceramic material made by the method of preparing.

Abstract: Provided herein is a method of preparing a porous composite ceramic material and a porous composite ceramic material made by the method of preparing.

Abstract: Described herein are polycatenar ligand compounds and their use in the production of hybrid nanoparticles, typically nanocrystals. The present disclosure also relates to films containing the hybrid nanoparticles described herein and their use.

Abstract: An electro-thermochemical cycling system for producing ammonia is provided that includes a reaction chamber having a metal compound input port, an anode suitable for oxidation in contact with the metal compound and configured for oxidation of hydroxide ions to water and oxygen, a cathode suitable for plating in contact with the metal compound and configured to electrolyze the metal compound to metal, a voltage source connecting the cathode and anode, a nitrogen port to the reaction chamber that combines nitrogen with the electrolyzed metal on the cathode to form a metal-nitrogen compound proximal to the nitrogen input, an atomic hydrogen port to the reaction chamber that combines with the metal-nitrogen compound to form ammonia, and an ammonia output port from the reaction chamber, where a metal compound input port inputs the metal compound to the reaction chamber according to a depletion rate of the metal compound in the reaction chamber.

Abstract: Core-shell nanoparticulate compositions and methods for making the same are disclosed. In some embodiments core-shell nanoparticulate compositions comprise transition metal core encapsulated by metal oxide shell. Methods of catalysis comprising core-shell nanoparticulate compositions of the invention are disclosed. Compositions comprising core-shell nanoparticles displayed on a metal-oxide support and methods for preparing the same are also disclosed. In some embodiments compositions comprise core-shell nanoparticles displayed as a substantially single layer superposed on a metal oxide support. Methods of catalysis employing the supported core-shell nanoparticles are disclosed.

Abstract: The present disclosure relates to a hybrid nanoparticle comprising a metallic core and at least one lipophilic dendron attached to the surface of the metallic core, and methods of producing such hybrid nanoparticles. The present disclosure also relates to films containing the hybrid nanoparticles described herein.

Abstract: The present disclosure relates to a hybrid nanoparticle comprising a metallic core and at least one lipophilic dendron attached to the surface of the metallic core, and methods of producing such hybrid nanoparticles. The present disclosure also relates to films containing the hybrid nanoparticles described herein.

Abstract: An electro-thermochemical cycling system for producing ammonia is provided that includes a reaction chamber having a metal compound input port, an anode suitable for oxidation in contact with the metal compound and configured for oxidation of hydroxide ions to water and oxygen, a cathode suitable for plating in contact with the metal compound and configured to electrolyze the metal compound to metal, a voltage source connecting the cathode and anode, a nitrogen port to the reaction chamber that combines nitrogen with the electrolyzed metal on the cathode to form a metal-nitrogen compound proximal to the nitrogen input, an atomic hydrogen port to the reaction chamber that combines with the metal-nitrogen compound to form ammonia, and an ammonia output port from the reaction chamber, where a metal compound input port inputs the metal compound to the reaction chamber according to a depletion rate of the metal compound in the reaction chamber.

Abstract: Core-shell nanoparticulate compositions and methods for making the same are disclosed. In some embodiments core-shell nanoparticulate compositions comprise transition metal core encapsulated by metal oxide shell. Methods of catalysis comprising core-shell nanoparticulate compositions of the invention are disclosed. Compositions comprising core-shell nanoparticles displayed on a metal-oxide support and methods for preparing the same are also disclosed. In some embodiments compositions comprise core-shell nanoparticles displayed as a substantially single layer superposed on a metal oxide support. Methods of catalysis employing the supported core-shell nanoparticles are disclosed.