Monolithic Photoelectrochemical Device for 19% Direct Water Splitting

Photoelectrochemical Tandem Cell with Bipolar Dye-Sensitized Electrodes for Vectorial Electron Transfer for Water Splitting

Direct water electrolysis was achieved with a novel monolithic photoelectrochemical cell. Bipolar WO3/Pt and dye-sensitized TiO2/Pt semiconductor panels, capable of vectorial electron transfer, have been used for water splitting to yield hydrogen and oxygen; light is the only energy input. The hydrogen production efficiency of this tandem cell, based on the short-circuit current, was 1.9% and t...

Direct hydrogen gas generation by using InGaN epilayers as working electrodes

We report on the growth and exploitation of InGaN epilayers as a photoelectrochemical cell PEC material for direct generation of hydrogen by splitting water using photoelectrochemical hydrolysis. Under white light illumination, a drastic dependence of the photocurrent density on the In content was observed. Direct hydrogen gas generation by splitting water was accomplished using an n-type InxGa...

Energy & Environmental Science Experimental Demonstrations of Spontaneous, Solar-driven Photoelectrochemical Water Splitting † Broader Context

Laboratory demonstrations of spontaneous photoelectrochemical (PEC) solar water splitting cells are reviewed. Reported solar-to-hydrogen (STH) conversion efficiencies range from o1% to 18%. The demonstrations are categorized by the number of photovoltaic junctions employed (2 or 3), photovoltaic junction type (solid–solid or solid–liquid) and the ability of the systems to produce separated reac...

Comparison of a-Fe2O3 electrodes grown by direct plasma and thermal oxidation of iron for photoelectrochemical water splitting

An Inexpensive Co-Intercalated Layered Double Hydroxide Composite with Electron Donor-Acceptor Character for Photoelectrochemical Water Splitting

In this paper, the inexpensive 4,4-diaminostilbene-2,2-disulfonate (DAS) and 4,4-dinitro-stilbene-2,2- disulfonate (DNS) anions with arbitrary molar ratios were successfully co-intercalated into Zn2Al-layered double hydroxides (LDHs). The DAS(50%)-DNS/LDHs composite exhibited the broad UV-visible light absorption and fluorescence quenching, which was a direct indication of photo-induced electro...