Chemical and physical properties of the Co catalysts.
| Catalyst | Surface areaa (m2 gcat−1) | H2 chemisorptionb (μmol gcat−1) | Particle sizec (nm) | Crystallite sized (nm) | Density of basic sitese (μmol m−2) |
|---|---|---|---|---|---|
| Co | 23.4 | 164 | 25 | 15 | 7.8 |
| 5Ca–Co | 22.3 | 169 | 26 | 17 | 9.0 |
| 5Ba–Co | 8.4 | 133 | 52 | 25 | 13.1 |
| (5Ca + 5Ba)–Co | 11.5 | 138 | 43 | 24 | 11.7 |
a
Estimated from the BET method.
b
Estimated by using H2-TPD.
c
Average Co particle size estimated from the STEM-EDX images (Fig. 5–8), and the corresponding particle size histograms are presented in Fig. S7.
d
Average Co crystallite size estimated from the FWHM value obtained from full pattern refinement utilising the Rietveld method ('size and strain' in High Score Plus software).
e
Estimated by using CO2-TPD.