Use of chemically derivatized n-type silicon photoelectrodes in aqueous media. Photooxidation of iodide, hexacyanoiron(II), and hexaammineruthenium(II) at ferrocene-derivatized photoanodes

XPS and electrochemical studies of ferrocene derivatives anchored on n- and p-Si(100) by Si–O or Si–C bonds

“…The anchoring of such molecules via a covalent bond on the surface of H-terminated Si(1 0 0) through wet-chemistry methods was the primary step towards a robust device. The two commercially available ferrocene derivatives were not used so far to produce monolayers on Si from a solution, despite the widespread interest in the subject, documented by reports on 1,1 0 -ferrocenediyldichlorosilane [12], ferrocenemethanol and N,N-dimethylaminomethylferrocene [13], ferrocenylphosphine [14], and 4-(hydroxymethyl)phenylferrocene [11]. The main difference displayed by VFC and FCA in terms of their reactivity towards H-Si consists of the functional groups C@C vs. C(H)@O.…”

Chemically derivatized semiconductor photoelectrodes

“…Table III summarizes Auger and cyclic voltammetry analyses of electrode surfaces bearing pQ 2 + that were exposed to H 2 0/0.1 M K 2 SO4/K2IrCI 6 . (33) Note that under the conditions employed, the Ir complex is u1-imat~ly present in the polylmer as the IrCl6 3 and that >25 pM IrCl 6 e-is sufficient to completely charge comRensate the-PQ 2+ system. At low IrCl 6 2 -concentrations the S04 -is competitively bound to the surface and there is an excellent correlation with Cl (from IrCl6 3 -) Auger signal intensity with the cyclic voltammetry data.…”

Chemically Derivatized Semiconductor Photoelectrodes

“…Table III summarizes Auger and cyclic voltammetry analyses of electrode surfaces bearing pQ 2 + that were exposed to H 2 0/0.1 M K 2 SO4/K2IrCI 6 . (33) Note that under the conditions employed, the Ir complex is u1-imat~ly present in the polylmer as the IrCl6 3 and that >25 pM IrCl 6 e-is sufficient to completely charge comRensate the-PQ 2+ system. At low IrCl 6 2 -concentrations the S04 -is competitively bound to the surface and there is an excellent correlation with Cl (from IrCl6 3 -) Auger signal intensity with the cyclic voltammetry data.…”