Controlled synthesis and catalytic properties of supported In-Pd intermetallic compounds

DTA/TG/MS measurements were used to investigate the temperature-dependent and successive phase formation of different intermetallic In-Pd compounds by controlled reduction of PdO/In2\O3 with hydrogen. Reduction procedures were developed to obtain supported intermetallic InPd and In3Pd2 particles by reactive metal-support interaction (RMSI) without detectable amounts of other compounds. In7Pd3 could only be obtained in admixture with elemental indium due to the direct reduction of the In2O3 support at temperatures above 350 degrees C. All materials exhibit catalytic activity for methanol steam reforming and exhibit high CO2 selectivities up to 98%. Long-term measurements proved the superior stability of the In-Pd/In2O3 materials in comparison with Cu-based systems over 100 h times on stream with high selectivity. (C) 2016 Elsevier Inc. All rights reserved.