University of Central Florida Research Foundation, Inc.

Nitto-denko Corporation

Other

Nahid Mohajeri

Ali Tabatabaie-Raissi

Koichi Nakamura

Gary Bokerman

Shinji Inokuchi

Hiroyuki Higuchi

Yu-chu Chen

Kujtim Bizati

Namiko Suzuki

Masaya Nishigawara

Nazim Z Muradov

Masahiko Hirose

Robert Paul Brooker

A gas detection element for detection of a measurement target gas is provided. The gas detection element includes a gas detection layer including a chemochromic pigment; and a spacer. The spacer is permeable to the measurement target gas, is disposed on a first surface of the gas detection layer, and has an area smaller than an area of the gas detection layer.

Gas detection element

A gas sensing element includes a gas detection layer including a pigment, the gas detection layer including a first surface; and a backing material disposed on the first surface of the gas detection layer. When reducing gas causes the gas sensing element to change in color, a color change &#x394;L* of the gas sensing element is greater than or equal to 5.

Gas sensing element

A gas sensing element includes a gas detection layer including a chemochromic pigment, with modifications towards enhancing shelf-life performance and false detection performance before use. The gas detection layer has an adhesion of greater than or equal to 0.2 N/25 mm. Also described are methods of making the aforedescribed element to attain enhanced shelf-life performance and false detection performance.

Gas sensing element and methods of making the same

An oxidation catalyst includes a support including particles of an alkaline earth salt, and first particles including a palladium compound on the support. The oxidation catalyst can also include precious metal group (PMG) metal particles in addition to the first particles intermixed together on the support. A gas permeable polymer that provides a continuous phase can completely encapsulate the particles and the support. The oxidation catalyst may be used as a gas sensor, where the first particles are chemochromic particles.

Oxidation catalysts on alkaline earth supports

A method of detecting defects in membranes such as ion exchange membranes of electrochemical cells. The electrochemical cell includes an assembly having an anode side and a cathode side with the ion exchange membrane in between. In a configuration step a chemochromic sensor is placed above the cathode and flow isolation hardware lateral to the ion exchange membrane which prevents a flow of hydrogen (H) between the cathode and anode side. The anode side is exposed to a first reactant fluid including hydrogen. The chemochromic sensor is examined after the exposing for a color change. A color change evidences the ion exchange membrane has at least one defect that permits Htransmission therethrough.

Method of detecting defects in ion exchange membranes of electrochemical cells by chemochromic sensors

A method of forming a supported oxidation catalyst includes providing a support comprising a metal oxide or a metal salt, and depositing first palladium compound particles and second precious metal group (PMG) metal particles on the support while in a liquid phase including at least one solvent to form mixed metal comprising particles on the support. The PMG metal is not palladium. The mixed metal particles on the support are separated from the liquid phase to provide the supported oxidation catalyst.

Method of forming supported doped palladium containing oxidation catalysts

A supported oxidation catalyst includes a support having a metal oxide or metal salt, and mixed metal particles thereon. The mixed metal particles include first particles including a palladium compound, and second particles including a precious metal group (PMG) metal or PMG metal compound, wherein the PMG metal is not palladium. The oxidation catalyst may also be used as a gas sensor.

Doped palladium containing oxidation catalysts

A (H) sensor composition includes a gas permeable matrix material intermixed and encapsulating at least one chemochromic pigment. The chemochromic pigment produces a detectable change in color of the overall sensor composition in the presence of Hgas. The matrix material provides high Hpermeability, which permits fast permeation of Hgas. In one embodiment, the chemochromic pigment comprises PdO/TiO. The sensor can be embodied as a two layer structure with the gas permeable matrix material intermixed with the chemochromic pigment in one layer and a second layer which provides a support or overcoat layer.

Gas permeable chemochromic compositions for hydrogen sensing

A method of generating hydrogen includes the steps of providing an amine borane (AB) complex, at least one hydrogen generation catalyst, and a solvent, and mixing these components. Hydrogen is generated. The hydrogen produced is high purity hydrogen suitable for PEM fuel cells. A hydrolytic in-situ hydrogen generator includes a first compartment that contains an amine borane (AB) complex, a second container including at least one hydrogen generation catalyst, wherein the first or second compartment includes water or other hydroxyl group containing solvent. A connecting network permits mixing contents in the first compartment with contents in the second compartment, wherein high purity hydrogen is generated upon mixing. At least one flow controller is provided for controlling a flow rate of the catalyst or AB complex.

Catalytic dehydrogenation of amine borane complexes

A method of generating hydrogen includes the steps of providing an amine borane (AB) complex, at least one hydrogen generation catalyst, and a solvent, and mixing these components Hydrogen is generated. The hydrogen produced is high purity hydrogen suitable for PEM fuel cells. A hydrolytic in-situ hydrogen generator includes a first compartment that contains an amine borane (AB) complex, a second container including at least one hydrogen generation catalyst, wherein the first or second compartment includes water or other hydroxyl group containing solvent. A connecting network permits mixing contents in the first compartment with contents in the second compartment, wherein high purity hydrogen is generated upon mixing. At least one flow controller is provided for controlling a flow rate of the catalyst or AB complex.

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Rockledge, FL, United States of America

Nahid Mohajeri