Ruthenium oxide decorated with platinum oxide and electrodes for the oxygen evolution reaction
OwnerStefan KOTREL, Daniel MALKO +1inventors
InventorsStefan KOTREL, Daniel MALKO, Britta MAYERHOEFER
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Abstract
A ruthenium oxide decorated with transition metal (M) oxide, wherein M=Pt, Rh, Pd, Ag and/or Au, particularly ruthenium oxide decorated with platinum oxide catalysts for polymer electrolyte membrane (PEM) fuel cells, water electrolysis, regenerative fuel cells (RFC) or oxygen generating electrodes in various electrolysis applications.
Claims15
A catalyst composition comprising ruthenium oxide, RuO2, particles containing a RuO2 lattice structure, wherein the RuO2 particles have at least one transition metal (M) oxide, wherein M=Pt, Rh, Pd, Ag and/or Au, deposited on the particle surface, and wherein this transition metal (M) oxide is present in the RuO2 phase by less than 1 wt.-% calculated as the element M, and relating to the total mass of the catalyst composition.
A catalyst composition comprising ruthenium oxide, RuO2, particles containing a RuO2 lattice structure, wherein the RuO2 particles that have a transition metal (M) oxide deposited on the particle surface thereof, wherein M=Pt, Rh, Pd, Ag and/or Au,
- wherein the transition metal (M) oxide is present in the RuO2 phase by less than 1 wt.-% calculated as the element M, and relating to the total mass of the catalyst composition, and
- wherein the catalyst composition comprises the elementary transition metal (M) of less than 1 wt.-%, relating to the total mass of the catalyst.
A process for obtaining a catalyst composition, wherein the composition comprises ruthenium oxide, RuO2, particles containing a RuO2 lattice structure, wherein the RuO2 particles that have a transition metal (M) oxide deposited on the particle surface thereof, wherein M=Pt, Rh, Pd, Ag and/or Au,
- wherein the transition metal (M) oxide is present in the RuO2 phase by less than 1 wt.-% calculated as the element M, and relating to the total mass of the catalyst composition, the process comprising the steps of:
- (a) mixing a predetermined amount of Pt oxide with a Ru precursor,
- (b) subjecting the raw material mixture to solid-phase reaction and
- (c) removing by-products from the resultant reactant.
Dependencies are inferred from the claim text.