Role of valency of copper in the direct decomposition of nitrogen monoxide over well characterized La2xA′xCu1–yB′yO4

Abstract
Catalytic activity is closely related to the valency of copper in the direct decomposition of NO over well characterized La2x A′xCu1-yB′yO4 catalysts (K2NiF4 structure; A′= Sr, B′= Al, Zr, x= 0–1.0, y = 0, 0.2); the formal valency of copper was controlled in the range 1.60–2.30.