Johnson Matthey Fuel Cells Limited

Technical Fibre Products Limited

Johnson Matthey Hydrogen Technologies Limited

Ian Roy Harkness

Jonathan David Brereton Sharman

Edward Anthony Wright

Alexander Martin Willcocks

Graham Alan Hards

Michael Ian Petch

Michael Jeschke

Rosemary Fisher

A non-woven gas diffusion substrate including: (i) a non-woven carbon fiber web; (ii) a carbon particulate material; and 10 (iii) a hydrophobic binder characterized in that the non-woven gas diffusion substrate further includes a conductive material having a x:y aspect ratio from 0.01 to 100, a x:z aspect ratio of at least 500 and a y:z aspect ratio of at least 500.

Gas diffusion substrate

A catalytic material includes (i) a support material and (ii) a thin film catalyst coating having an inner face adjacent to the support material and an outer face, the thin film catalyst coating having a mean thickness of &#x2266;8 nm, and wherein at least 40% of the support material surface area is covered by the thin film catalyst coating; and wherein the thin film catalyst coating includes a first metal and one or more second metals, and wherein the atomic percentage of first metal in the thin film catalyst coating is not uniform through the thickness of the thin film catalyst coating.

Thin film catalytic material for use in fuel

A process for preparing a catalytic material including (i) a support material and (ii) a thin film catalyst coating, the coating including one or more first metals, wherein the process includes the steps of: providing a multilayer thin film coating of a second metal on the support material; and spontaneous galvanic displacement of at least some of the second metal with the one or more first metals; wherein the second metal is less noble than the one or more first metals.

Process for preparing a catalytic material

A porous catalyst layer formed from discrete particles of unsupported metal, wherein at least 80%, suitably at least 90%, of the discrete particles have a mass of from 1 to 1000 zeptograms, and wherein the catalyst layer has a metal volume fraction of less than 30% and a metal loading of less than 0.09 mg/cmis disclosed. The catalyst layer is suitable for use in fuel cells and other electrochemical applications.

Growing community of inventors

Oxford, United Kingdom

Ian Roy Harkness