Spectroscopic investigation of redox and acidic properties of Co-substituted aluminophosphate CoAPO-11

Acid sites in Co-substituted aluminophosphate CoAPO-11 and its redox properties have been investigated using UV-VIS and IR spectroscopy. The acquired data revealed the absence of the bridged OH groups as a common feature of M II -containing aluminophosphates. The behavior of Co 2+ /Co 3+ couple in redox reactions was very different from that characteristic of supported cobalt ions.