A substoichiometric tungsten oxide catalyst provides a sustainable and efficient counter electrode for dye-sensitized solar cells

Abstract

Article:Uppachai, P, Harnchana, V, Pimanpang, S et al. (3 more authors) (2014) A substoichiometric tungsten oxide catalyst provides a sustainable and efficient counter electrode for dye-sensitized solar cells. Electrochimica Acta, https://doi.org/10.1016/j.electacta.2014.08.096 eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request.

Hydrogenolysis of Glycerol to Monoalcohols over Supported Mo and W Catalysts

“…Similar substoichiometric WO3. 62 For WO3/SiO2, similar oxidation observations were also made with the MoO3 catalysts which states are found, but clearly there is a greater concentration of could be due to the low concentration of the reductant (5% H2 the lower oxidation states. in Ar) used for the reduction.…”

Optical and structural analysis of solar selective absorbing coatings based on AlSiOx:W cermets

“…The peaks appearing at 30.5 eV and 30.6 eV binding energies can be associated with metallic tungsten in D1 and D2 samples, respectively (Xie et al, 2012;Wong et al, 2000). While the peaks at 36 eV, 34.8 eV and 33.1 eV can be ascribed to the oxidation states of W 6+ , W 5+ and W 4+ , respectively, (Xie et al, 2012;Uppachai et al, 2014;Zhang et al, 2009;Yang et al, 2014), and the peaks at 31.6-31.7 eV can be attributed to the intermediate W 1+ , W 2+ and W 3+ oxidation states commonly known as the W x+ oxidation state (Xie et al, 2012;Yang et al, 2014). This W x+ oxidation can be explained by tungsten ions bonded to oxygen and tungsten ions.…”

Polaron mobility in oxygen-deficient and lithium-doped tungsten trioxide

“…Substoichiometric W O 3−x also shows multifarious electrochromic behavior, demonstrating different degrees of coloration depending on the concentration of oxygen vacancies [36,37]. Thus, experiments clearly indicate that both doping (H, Li) and oxygen vacancies can influence W O 3 optical properties [33,[37][38][39].…”

“…Based on neutron diffraction data [34,35] this difference between H and Li has been explained by the formation of O − H bonds upon hydrogen insertion. At the same time alkali metal ions show no tendency of binding to the oxygen atoms of the oxide matrix.Substoichiometric W O 3−x also shows multifarious electrochromic behavior, demonstrating different degrees of coloration depending on the concentration of oxygen vacancies [36,37]. Thus, experiments clearly indicate that both doping (H, Li) and oxygen vacancies can influence W O 3 optical properties [33,[37][38][39].Two general concepts of the colouration mechanism in tungsten oxide have been suggested: inter-valence charge transfer [4] and polaron models [40,41], the latter being more commonly accepted.…”