Table 1. Physicochemical Properties of Reduced Materials.
material | EA,wt % | particle size,a nm | CO chemisorption,b molCO molPd–1 (ĐCO) | H2 chemisorption, molH2 molPd–1 | H/CO ratio | terminal CO stretch, cm–1 | bridging CO stretch, cm–1 |
---|---|---|---|---|---|---|---|
PdGa@SiO2 | Pd: 1.08 | 1.6 ± 0.4 | 0.55 (55%) | 0.56 | 2.0 | 2086 | 1960 |
Ga: 1.66 | |||||||
Pd@SiO2 | Pd: 1.61 | 1.6 ± 0.3 | 0.61 (61%) | 0.91 | 3.0 | 2094 | 1967 |
Particle size determined by TEM.
Dispersion assumes 1:1 ratio CO/Pdsurface.