Danmarks Tekniske Universitet

Alfa Laval Corporate Ab

Technical University of Denmark

Ib Chorkendorff

Debasish Chakraborty

Ole Hansen

Thomas F Jaramillo

Morten Godtfred Nielsen

Christian Nagstrup Conradsen

Heine Anton Hansen

Björn Wickman

Thomas Pedesen

Sine Ellemann Olesen

Peter Christian Kjærgaard Vesborg

Jens Nørskov

Tobias Johansson

Jakob Lind Olsen

Jeffrey Greeley

Jan Rossmeisl

Ifan Stephens

Daniel Bøndergaard Trimarco

Hugo José Lopes Silva

Alexander S Bondarenko

Paolo Malacrida

Samira Siahrostami

Mohammedreza Karamad

María Escudero-Escribano

Arnau Verdaguer-Casadevall

Alexander Bondarenko

The invention relates to a device () for extracting volatile species from a liquid () connected to an inlet of an analysis instrument, such as a mass spectrometer (MS). The device has a chamber (), a membrane () forming a barrier for the liquid at zero differential pressure between the inside and the outside of the chamber, and allowing passage of the volatile species at zero differential pressure between the inside and the outside of the chamber. The device has an inlet capillary channel () to feed in a carrier gas and prevent back-diffusion from the chamber, and an outlet capillary channel () which provides a significant pressure reduction, e.g. from atmospheric pressure in the chamber () to near-vacuum suitable for an MS. The invention combines the best of two worlds, i.e. the fast time-response of a DEMS system and the high sensitivity of a MIMS system, since a differential pumping stage is not needed.

Device for extracting volatile species from a liquid

The invention contributes to a cost effective way to solve the problem of trace ammonia removal from a hydrogen and nitrogen containing gas. The set of catalysts of the invention selectively oxidized ammonia in ppm concentration even in gas mixtures containing hydrogen gas in concentrations of three orders of magnitude higher than the concentration of ammonia.

Use of catalysts, method and apparatus for selective oxidation of ammonia in a gas containing hydrogen

The present invention relates to a bimetallic catalyst for ammonia oxidation, a method for producing a bimetallic catalyst for ammonia oxidation and a method for tuning the catalytic activity of a transition metal. By depositing an overlayer of less catalytic active metal onto a more catalytic active metal, the total catalytic activity is enhanced.

Catalyst for ammonia oxidation

The present invention concerns electrode catalysts used in fuel cells, such as proton exchange membrane (PEM) fuel cells. The invention is related to the reduction of the noble metal content and the improvement of the catalytic efficiency by low level substitution of the noble metal to provide new and innovative catalyst compositions in fuel cell electrodes. The novel electrode catalysts of the invention comprise a noble metal selected from Pt, Pd and mixtures thereof alloyed with a further element selected from Sc, Y and La as well as any mixtures thereof, wherein said alloy is supported on a conductive support material.

Platinum and palladium alloys suitable as fuel cell electrodes

Growing community of inventors

Birkerød, Denmark

Ib Chorkendorff