Anode with lead base and method of making same

Claim 1

An anode for oxygen evolution in an acid electrolyte, comprising an anode base of lead or lead alloy, characterized in that catalytic particles, which have a size lying between about 75 microns and about 850 microns and consist of valve metal to which at least one catalyst for oxygen evolution comprising a platinum group metal is fixed in a small amount lying between 0.3% and 6% by weight of said valve metal, are uniformly distributed on and partly embedded in the surface of the anode base of lead or lead alloy, whereby said catalytic particles are firmly anchored and electrically connected to said anode base, while their remaining, non-embedded part projects from said surface of the anode base, and thereby presents a larger projecting surface than the underlying surface of the anode base of lead or lead alloy, so that oxygen can be evolved on said projecting surface of the partly embedded catalytic particles at a reduced potential at which the underlying lead or lead alloy of said base remains electrochemically inactive and thereby essentially serves as a current-conducting support for said partly embedded catalytic particles of valve metal with a small amount of said catalyst.