Catalyst system, electrode and fuel cell or electrolyzer

Abstract

A catalyst system (9), an electrode (1) which includes the catalyst system (9), and a fuel cell (10) or an electrolyzer having at least one such electrode (1) are provided. The catalyst system (9) includes an electrically conductive carrier metal oxide and an electrically conductive, metal oxide catalyst material. A near-surface pH of the carrier metal oxide and the catalyst material differ. The catalyst material and the carrier metal oxide form an at least two-phase disperse oxide composite. The carrier metal oxide has a first crystal lattice structure having first oxygen lattice sites and first metal lattice sites, wherein the carrier metal oxide on the first oxygen lattice sites is preferably doped with at least one element from the group including nitrogen, carbon, and boron, and is optionally additionally doped with hydrogen. The carrier metal oxide has a second crystal lattice structure having second oxygen lattice sites and second metal lattice sites, wherein the catalyst material on the second oxygen lattice sites is preferably doped with fluorine and at least one element from the group including nitrogen, carbon and boron, and optionally additionally doped with hydrogen.

CPC Classifications