An oxygen gas supply device includes a tubular hydrated ion-exchange membrane defining an inner surface, an outer surface and an outlet. An outer catalytic membrane at the outer surface and an inner catalytic membrane at the inner surface are in electrical communication with a direct current power source. Application of electromotive force between the outer and inner catalytic membranes causes an oxygen gas component of the ambient air in contact with one or the other of the outer and inner catalytic membranes to be separated and collected at the other catalytic membrane and thereby be collected as an oxygen gas supply.
