Effect of Pt addition to Ni/La0.7Sr0.3AlO3-δ catalyst on steam reforming of toluene for hydrogen production

Pt/Ni/La(0.7)Sr(0.3)ALO(3-delta) (Pt/Ni/LSAO) catalyst showed high catalytic activity and low coke formation for hydrogen production by steam reforming of toluene, even without pre-reduction. STEM-EDX and XAFS analyses revealed that Pt and Ni formed adjacent or alloy structure. Electron donation from supported Pt to Ni was observed by XPS observation, and the improvement of reducibility of Ni by Pt addition was observed by H-2-TPR. Catalytic activity of the reduced Ni was brought by the Pt-Ni interaction. The impregnation order of Pt and Ni affected the catalytic activity and the amount of coke formation due to the difference of the structure of supported metals. Dilution effects of Pt on Ni metal and the contact between Ni and LSAO support apparently affect the suppression of coke formation. (C) 2013 Elsevier B.V. All rights reserved.