On-surface catalysis

Molecular-scale study of the Oxygen Reduction Reaction mechanism using surface supported Fe-phthalocyanines as catalysts

nmat3453-s2.mov

Oxygen reduction reaction on Ag(110)-supported Fe phthalocyanine

The catalytic activity of FePc can be tuned changing the arrangement and the adsorption sites of the molecule on the metal substrate.
Sedona, F., Di Marino, M., Forrer, D., Vittadini, A., Casarin, M., Cossaro, A., ... & Sambi, M. (2012). Tuning the catalytic activity of Ag (110)-supported Fe phthalocyanine in the oxygen reduction reaction. Nature materials, 11(11), 970.

Switching the Fe phthalocyanine Magnetic Moment with oxygen

The consequences of the evolution of the active site in the oxygen reduction reaction catalyzed by iron phthalocyanine submonolayers deposited on the Ag(110) surface are explored. The capacity of reversibly and sharply switching the magnetic state of FePc molecules by chemical means is conclusively evidenced by X-ray magnetic circular dichroism (XMCD) at the Fe L_2,3absorption edge.
Bartolomé, J., Bartolomé, F., Brookes, N. B., Sedona, F., Basagni, A., Forrer, D., & Sambi, M. (2015). Reversible Fe magnetic moment switching in catalytic oxygen reduction reaction of Fe-phthalocyanine adsorbed on Ag (110). The Journal of Physical Chemistry C, 119(22), 12488-12495.

Dioxygen bond dissociation on Fe phthalocyanine on Ag(100)

Even if dioxygen adsorbs in the end-on configuration on-top of the Fe atoms, we give the first experimental evidence of the substrate involvement in the O2 bond dissociation.
Sedona, F., Cicero, M. L., Carlotto, S., Basagni, A., Fakhrabadi, M. M. S., Casarin, M., & Sambi, M. (2018). Substrate involvement in dioxygen bond dissociation catalysed by iron phthalocyanine supported on Ag (100). Chemical Communications, 54(68), 9418-9421.

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