A method is disclosed for manufacturing one or more oxygen scavenging particles, wherein the particle(s) comprises an oxidizable metal particle, such as elemental iron； an acidifying electrolyte such as sodium or potassium bisulfate and optionally a water hydrolysable Lewis acid, such as aluminum chloride. The method comprises the step of coating the oxidizable particle with a first compound and then reacting the first compound with a second compound to form a third compound, wherein the third compound promotes the reaction of the oxidizable particle with oxygen.
