The development of fast, selective and robust catalysts for the reduction of water and CO2 and the oxidation of water is central to converting light energy into chemical energy, as is the development of controllable and robust interfaces between these catalysts and light-absorber/charge separator structures.  We will report new polyoxometalate (POM)-based catalysts for the above processes and describe new methods for distinguishing catalysis of the above multi-electron processes by POMs, such as Na10[Co4(H2O)2(VW9O34)2], the fastest known molecular water oxidation catalyst (WOC), versus catalysis by hydrated redox-active transition-metal ions, TMn+, e.g. Co2+, that are in an in-POM = out-of-POM equilibrium, (TMn+)POM = TMn+ + POM, and metal oxide nanoparticles (such as CoOx). Dyadic and triadic structures comprising POMs and photosensitizer molecules on electrodes have been prepared and the electron transfer dynamics upon irradiation have been measured.

Polyoxometalate-based catalysts for solar fuel production

248th National Meeting (2014)

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