Evidence of a unique electron donor-acceptor property for platinum nanoparticles as studied by XPS
Limei Qiu1, Fen Liu, Liangzhong Zhao
1Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, PR China.
Abstract:
In the interaction of PVP with Pt nanoparticles <7 nm in size, charge transfer is from carbonyl groups in PVP to Pt nanoparticles, whereas in the interaction of PVP with bulk Pt or Pt nanoparticles >25 nm in size, charge transfer is from Pt metal to the polymer side chain of PVP. There exists a critical nanoparticle size between 7 and 25 nm that would lead to a switch in the electron donor-acceptor property.


