Structural dependence of photocatalytic hydrogen production over La/Cr co-doped perovskite compound ATiO3 (A = Ca, Sr and Ba)

233Structural variations by altering A-site cations of perovskites ATiO3 (A = Ca, Sr and Ba) strongly govern the light absorbance and catalytic performance. A long TiO bond and deviation of TiOTi bond angle away from 180° substantially deteriorate the visible light absorption and photocatalytic activity.