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

Abstract 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/In 2 O 3 with hydrogen. Reduction procedures were developed to obtain supported intermetallic InPd and In 3 Pd 2 particles by reactive metal–support interaction (RMSI) without detectable amounts of other compounds. In 7 Pd 3 could only be obtained in admixture with elemental indium due to the direct reduction of the In 2 O 3 support at temperatures above 350 °C. All materials exhibit catalytic activity for methanol steam reforming and exhibit high CO 2 selectivities up to 98%. Long-term measurements proved the superior stability of the In–Pd/In 2 O 3 materials in comparison with Cu-based systems over 100 h times on stream with high selectivity.