Tailoring copper valence states in CuO delta/gamma-Al2O3 catalysts by an in situ technique induced superior catalytic performance for simultaneous elimination of NO and CO

An in situ technique is employed to tailor the valence states of copper in CuO delta/gamma-Al2O3 catalysts with the purpose of inducing superior catalytic performance for simultaneous elimination of NO and CO. The catalyst with zero-valent copper exhibits excellent catalytic performance, which is comparable with the conventional supported noble-metal catalysts.