Mesoporous Al-La-Mn oxides are prepared via spray pyrolysis and are applied to the catalytic decomposition of hydrogen peroxide. The characteristics of the mesoporous Al-La-Mn oxides are examined using N-2 adsorption, X-ray diffraction, and X-ray fluorescence measurements. The surface area and pore size of the Al-La-Mn oxides prepared via spray pyrolysis are larger than those of the Al-La-Mn oxides prepared using a precipitation method. The catalytic performance of the materials during the decomposition of hydrogen peroxide is examined in a pulse-injection reactor. It is confirmed that the mesoporous Al-La-Mn oxides prepared via spray pyrolysis exhibit higher catalytic activity and stability in the decomposition of hydrogen peroxide than Al-La-Mn oxides prepared using a conventional precipitation method. (C) 2016 Elsevier Ltd. All rights reserved.