Photo-electrochemical properties of the TiO2-Pt system in aqueous solutions

Reduced Graphene Oxide Bipolar Membranes for Integrated Solar Water Splitting in Optimal pH

“…Ap roposed membrane-electrode assembly is depicted in Figure8,i nw hich the membrane-embedded photoelectrode bases make electrical contact with the rGO interfacial layer.I na ddition to the intrinsic electrical conductivity of the interfacial layer,t he nature of the electricalc ontact with photoelectrode materials is also ac riticala spect to transport charges efficiently.G iven that such materialsw ill be semiconductors, the junction formed with other semiconductors, such as rGO, may form ap otential barrier, which impedes charge transport and createsavoltage drop across the membrane. [1,7] Akey concern for this material, and all photoelectrode materials, is its stability in PEC environments,w hichi nclude aqueous media, photoirradiation, and charge transfer.R ecent work has shown that it is possible to passivate, and accordingly protect, the surface of Si with am onolayer of surface-attached methyl groups (Me-p-Si). [37][38][39][40] p-type Si is ap romising photocathodeb ecause of its prevalence in currentp hotovoltaic technology and favorable band alignment to the HER potential.…”

“…[1] Accomplishing this feat will requireo ptimization of the components necessary to execute the reactions, which include the light-absorbing and charge-carrier-generating semiconductors, [2] redox reaction-impelling catalysts, [3,4] and charge-a nd product-managing membrane. The usable solar energy is relianto nt he distribution of photon energies incident on the earth's surface, for which the range is furtherr educed by the minimum potential energy to split water (1.23 eV).…”

“…The realization of efficient PEC-WS is dependent on as ystem that minimizes potential drops to no more than~0.8 Vt oa chieve total workingv oltages < 2V . [1] Accomplishing this feat will requireo ptimization of the components necessary to execute the reactions, which include the light-absorbing and charge-carrier-generating semiconductors, [2] redox reaction-impelling catalysts, [3,4] and charge-a nd product-managing membrane. [5] For rudimentary electrolysis,t he latter component can be satisfied using existing materials, such as the transparent, robust proton-exchange membrane Nafion.…”

A simple and environmentally friendly method of preparing sulfide photocatalyst

“…Hydrogen is the most promising replacement for fossil fuels. The conversion of renewable and abundant solar energy to hydrogen has been considered an ideal solution to answer the environmental problems and to reduce the use of fossil fuels (Bak et al, 2002;Chen and Ye, 2007;Kudo and Sekizawa, 2000;Kudo, 2007;Liu et al, 2007;Matsumoto et al, 2004).…”

Some interesting properties of black hydrogen-treated TiO2 nanowires and their potential application in solar energy conversion

“…It has advantages of low coast, high chemical stability, and strong oxidation capability for water oxidation [2][3][4][5][6]. However, one of the major limitations of TiO 2 is its wide bandgap and thereby weak absorption in the visible and near-infrared (NIR) regions.…”