Interfacial electron transfer on cytochrome-c sensitised conformally coated mesoporous TiO2 films

A functionalised nickel cyclam catalyst for CO2 reduction: electrocatalysis, semiconductor surface immobilisation and light-driven electron transfer

“…4. 34,35 In contrast the electrochemical response of nc-TiO 2 -2 is markedly different with the presence of a new reductive feature at À1.5 V (vs. Fc/Fc + ), assigned to the reduction of the Ni II of complex 2, indicating that the catalyst remains electrochemically active on the semiconductor surface and that electron transfer from the semiconductor to the catalyst is achievable. The dependence of the current response on increasing scan rate (Fig.…”

Fully Reversible Electrically Induced Photochromic-Like Behaviour of Ag:TiO2 Thin Films

“…The mp TiO 2 films combine transparency in the visible region of the electromagnetic spectrum with a high surface area accessible to molecules from a surrounding solution (e.g., AgNPs). In many cases in the past, this allowed the adsorbed molecules (dyes, proteins, electrochromic species and surfactants) to achieve the densities required for informative electronic absorption spectroscopy, whether that was for the development of solar cells, electrochemical biosensors, electrochromic devices or catalytic applications [3,4,9,27,38,39]. Therefore, the transparency of the electrodes can be useful as it could allow the AgNPs adsorption process and their electrochromic properties to be monitored by UV-Vis absorption spectroscopy, which is a technique also used by other authors for the structural characterization of the AgNPs in a dielectric matrix [27,[38][39][40][41].…”

“…Mesoporous (mp) nanocrystalline titanium dioxide (TiO 2 ) films are optically transparent for wavelengths greater than 390 nm due to their wide energy band gap, at ca. 3.2 eV [3]. The TiO 2 films comprise a rigid, porous network which is built with 10-40 nm nanocrystalline TiO 2 nanoparticles.…”

Thickness-Dependent Bioelectrochemical and Energy Applications of Thickness-Controlled Meso-Macroporous Antimony-Doped Tin Oxide

“…Such porous electrodes open the way for hybrid photovoltaic [1][2][3][4][5][6][7][8][9], battery [10], photocatalytic [11][12][13][14] and sensing [15,16] applications. The high surface area provided by mesopores allows for high surface coverage of redox-active species on an electrode [7,[17][18][19][20], while the co-presence of openly connected macropores facilitates the better diffusivity of solvent and solutes for better electrochemical performance [9,[21][22][23] and is crucial for diffusion of bulky molecules through the entire coating thickness [15,16,24]. Macroporous coatings of transparent conducting oxides (TCOs), namely of SnO 2 and TiO 2 -based materials, have been synthesized by various methods.…”