Table 1 XPS data for the as-obtained Cr2O3 and its calcination products (400°–800 °C).
From: Non-noble, efficient catalyst of unsupported α-Cr2O3 nanoparticles for low temperature CO Oxidation
Test catalyst | Surface composition | ||
|---|---|---|---|
Emission | Species# | BE(eV) | |
Cr2O3-RT | O(1s) | O2− | 529.6 |
O(1s) | O2− | 531.2 | |
O(1s) | OH/H2O | 533.2 | |
Cr(2p3/2) | Cr3+ | 576.8 | |
Cr(2p3/2) | Cr6+ | 578.9 | |
Cr(2p1/2) | Cr3+ | 586.5 | |
Cr(2p1/2) | Cr6+ | 588.3 | |
Cr2O3-4 | O(1s) | O2− | 529.9 |
O(1s) | O2− | 531.6 | |
O(1s) | OH/H2O | 533.5 | |
Cr(2p3/2) | Cr3+ | 576.0 | |
Cr(2p3/2) | Cr6+ | 577.9 | |
Cr(2p1/2) | Cr3+ | 585.7 | |
Cr(2p1/2) | Cr6+ | 587.9 | |
Cr2O3-6 | O(1s) | O2− | 529.8 |
O(1s) | O2− | 531.4 | |
O(1s) | OH− | 532.9 | |
Cr(2p3/2) | Cr3+ | 576.2 | |
Cr(2p3/2) | Cr6+ | 578.3 | |
Cr(2p1/2) | Cr3+ | 585.9 | |
Cr(2p1/2) | Cr6+ | 588.1 | |
Cr2O3-8 | O(1s) | O2− | 529.6 |
O(1s) | O2− | 531.5 | |
O(1s) | OH− | 533.1 | |
Cr(2p3/2) | Cr3+ | 576.0 | |
Cr(2p3/2) | Cr6+ | 578.2 | |
Cr(2p1/2) | Cr3+ | 585.7 | |
Cr(2p1/2) | Cr6+ | 587.9 | |
