Donor-π-acceptor dye-sensitized photoelectrochemical and photocatalytic hydrogen evolution by using Cu2WS4 co-catalyst. (15th January 2019)

• Record Type: Journal Article
• Authors: Patir, Imren Hatay; Aslan, Emre; Yanalak, Gizem; Karaman, Merve; Sarilmaz, Adem; Can, Mumin; Can, Mustafa; Ozel, Faruk
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 3(2019)
• Page Start: 1441
• Page End: 1450
• Publication Date: 2019-01-15
• Subjects: Hydrogen evolution -- Dye sensitization -- Donor-π-acceptor dyes; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.11.161
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Photoelectrochemical and photocatalytic hydrogen evolution reaction (HER) have been investigated by using metal free donor-acceptor (D-A) and donor-π-acceptor (D-π-A) dyes, which are abbreviated as MC-32 and MC-048, respectively, sensitized TiO2 as a photocatalyst with or without Cu2 WS4 co-catalyst. This co-catalyst is synthesized by a low-cost and simple hot injection method, under visible light illumination. The photoactivities of these dyes have been clarified according to their structural, optical and electrochemical properties. Photocatalytic activities have been slightly increased when added the Cu2 WS4 co-catalyst (dye/TiO2 /Cu2 WS4 ). This catalytic activity is also compared to that of noble metal Pt (dye/TiO2 /Pt). It has been found that 121 μmolg −1 h −1, 179 μmolg −1 h −1, 348 μmolg −1 h −1, 212 μmolg −1 h −1, 422 μmolg −1 h −1 and 1139 μmolg −1 h −1 hydrogen have been evolved by using MC-32/TiO2, MC-32/TiO2 /Cu2 WS4, MC-32/TiO2 /Pt, MC-048/TiO2, MC-048/TiO2 /Cu2 WS4 and MC-048/TiO2 /Pt, respectively. Graphical abstract: Highlights: MC-32 and MC-048 dyes are used for photocatalytic hydrogen evolution for first time. Noble metal free Cu2 WS4 co-catalyst is used on photocatalytic hydrogen evolution. Cu2 WS4 is synthesized by hot-injection method. Photoactivities are investigated by chromatographic and electrochemical methods. This work shows hydrogen evolution using dye-TiO2 -metal sulfide catalysts.