Johnson Matthey Hydrogen Technologies Limited

Johnson Matthey Hydrogen Technologies Limted

Jonathan Sharman

Geoffrey Spikes

Dash Fongalland

David P Wilkinson

Alejandro Martinez Bonastre

Arman Bonakdarpour

Richard Walton

Lucy Mcleod

Baizeng Fang

Lius Daniel

The present invention provides a metal carbonitride comprising: i) a first metal, M; and ii) a second metal, M; wherein Mis titanium, zirconium or hafnium; and Mis vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron, ruthenium or osmium.

Catalyst support

Methods of preparing catalyst materials are provided. The catalyst material comprise electrocatalyst particles, a support material, and graphitic carbon nitride. The methods comprise applying graphitic carbon nitride to a catalyst material precursor.

Methods of preparing catalyst materials

A catalysed ion-conducting membrane comprising an ion-conducting membrane, an electrocatalyst layer having two opposing faces, and a layer A comprising an ion-conducting material and a carbon containing material, and methods for preparing the catalysed ion-conducting membrane are provided.

Catalysed, ion-conducting membrane

The use of an electrocatalyst material in an anode catalyst layer, wherein the electrocatalyst material comprises a support material, the support material comprising a plurality of individual support particles or aggregates wherein each individual support particle or aggregate has dispersed thereon (i) first particles and (ii) second particles, wherein: (i) the first particles comprise Pt optionally alloyed with an alloying metal X1; wherein the optional alloying metal X1 is selected from the group consisting of Rh, Ti, Os, V, Co, Ni, Ga, Hf, Sn, Ir, Pd, Mo, Zn, W, Zr and Re; (ii) the second particles consist essentially of a second metal or a second metal compound wherein the second metal is selected from the group consisting of Ir and Ru and the second metal compound comprises IrX2 wherein X2 is selected from the group consisting of Ta, Nb, Ru, Ni and Co; and wherein if the first particles consist of Pt then the second particles do not comprise IrTa; and wherein if the first particles consist of Pt without alloying metal X1 and the second particles consist essentially of a second metal which is Ir, each individual support particle or aggregate of the support material of the electrocatalyst material has dispersed thereon only the said first and second particles; or wherein each individual support particle or aggregate has dispersed thereon (i) first particles and (ii) third particles, wherein: (iii) the third particles comprise Au or a third metal alloy; wherein the third metal alloy is selected from the group consisting of AuX3 and PdX4, wherein X3 is selected from the group consisting of Pt, Pd, Cu, Ir and Sn; and X4 is selected from the group consisting of Hg, Au, Sn, Co, Ni, Ga, In, Zn, W and Pb.

Catalyst

The present invention provides a catalysed ion-conducting membrane comprising an ion-conducting membrane, an electrocatalyst layer having two opposing faces, and a layer A comprising an ion-conducting material and a carbon containing material. Also provided are methods for preparing the catalysed ion-conducting membrane.

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Reading, United Kingdom

Jonathan Sharman