Flux-mediated doping of SrTiO₃photocatalysts for efficient overall water splitting

Abstract

SrTiO3 doped with Al and treated with SrCl2 flux showed an apparent quantum efficiency of 30% at 360 nm in the photocatalytic overall water splitting reaction.

Topotactic Epitaxy of SrTiO3 Mesocrystal Superstructures with Anisotropic Construction for Efficient Overall Water Splitting

“…[10] The deposition of mixed-oxide Rh 2Àx Cr x O 3 was confirmed by XPS (Supporting Information, Figure S14). [10] The deposition of mixed-oxide Rh 2Àx Cr x O 3 was confirmed by XPS (Supporting Information, Figure S14).…”

“…The SrTiO 3 mesocrystal exhibits three times the efficiency for the hydrogen evolution of conventional disordered systems in alkaline aqueous solution. [10] Wang et al incorporated this material into photocatalyst sheet systems with an oxygen evolution photocatalyst (Mo-doped BiVO 4 )a nd aA ul ayer in which good electric contacts between the particulate semiconductors and Au are necessary to reduce the resistance and thus increase reaction efficiency. [1] As ap rototypical perovskite,s trontium titanate (SrTiO 3 )w ith ac ubic crystal structure has attracted growing attention in the fields of electromagnetic devices [2] and solar energy conversion systems.…”

“…[3] With the prospect of further reducing human energy usage and alleviating environmental pollution, [4] heterogeneous solid photocatalysts have been expected to exhibit promising solar-to-chemical energy conversion from water since 1972. [10] Wang et al incorporated this material into photocatalyst sheet systems with an oxygen evolution photocatalyst (Mo-doped BiVO 4 )a nd aA ul ayer in which good electric contacts between the particulate semiconductors and Au are necessary to reduce the resistance and thus increase reaction efficiency. [9] For instance,La-and Rh-codoped SrTiO 3 has been shown to work as an efficient hydrogen evolution reaction (HER) photocatalyst for overall water splitting under visible-light irradiation.…”

“…[5] To promote the reaction efficiency,n umerous strategies have been developed, including band engineering, [6] morphology tailoring, [7] co-catalysts assistance, [8] and reaction environment optimization. [10] Wang et al incorporated this material into photocatalyst sheet systems with an oxygen evolution photocatalyst (Mo-doped BiVO 4 )a nd aA ul ayer in which good electric contacts between the particulate semiconductors and Au are necessary to reduce the resistance and thus increase reaction efficiency. [10] Wang et al incorporated this material into photocatalyst sheet systems with an oxygen evolution photocatalyst (Mo-doped BiVO 4 )a nd aA ul ayer in which good electric contacts between the particulate semiconductors and Au are necessary to reduce the resistance and thus increase reaction efficiency.…”

Introductory lecture: sunlight-driven water splitting and carbon dioxide reduction by heterogeneous semiconductor systems as key processes in artificial photosynthesis

“…and Ga2O3 doped with Zn and Ca and loaded with a Rh2-yCryO3 cocatalyst54 have been shown to decompose water into hydrogen and oxygen stoichiometrically with AQY values of 56% at 270 nm and 71% at 254 nm, respectively. More recently, it was found that SrTiO3 doped with Al in the presence of a SrCl2 flux and loaded with a Rh2-yCryO3 cocatalyst shows an AQY of 30% at 360 nm 55. These photocatalysts are, however, not applicable to solar energy conversion because of their short absorption edge wavelengths.…”