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Graphene-supported [{Ru4O4(OH)2(H 2O)4}(γ-SiW10O36) 2]10- for highly efficient electrocatalytic water oxidation

Journal Article


Abstract


  • The electrochemistry of the Ru-containing polyoxometalate (POM) water oxidation molecular catalyst, Rb8K2[{Ru4O 4(OH)2(H2O)4}(γ-SiW 10O36)2]10- (Rb8K 2-1), has been studied by cyclic and rotating disk electrode voltammetric methods in aqueous media under acidic and neutral pH conditions using bare glassy carbon (GC) and graphene modified GC electrodes. High concentrations of supporting electrolyte are needed in neutral pH conditions to overcome the electrical double layer effect associated with the highly negatively charged 1. Complex 1 can be confined within the highly porous wet graphene film to form a stable modified electrode, which shows excellent catalytic activity and high stability toward the water oxidation reaction under neutral pH conditions, particularly in the presence of 1.0 M Ca(NO 3)2. The catalytic activity of the graphene supported 1 electrode is nearly two orders of magnitude higher than that reported with a polymer coated multiwalled carbon nanotube supported 1 electrode when both are employed at a moderate overpotential of 0.35 V. © 2013 The Royal Society of Chemistry.

UOW Authors


  •   Guo, Si Xuan. (external author)
  •   Liu, Yuqing (external author)
  •   Lee, Chong Yong
  •   Bond, Alan M. (external author)
  •   Zhang, Jie (external author)
  •   Geletii, Yurii V. (external author)
  •   Hill, Craig L. (external author)

Publication Date


  • 2013

Citation


  • Guo, S. Xuan., Liu, Y., Lee, C., Bond, A. M., Zhang, J., Geletii, Y. V. & Hill, C. L. (2013). Graphene-supported [{Ru4O4(OH)2(H 2O)4}(γ-SiW10O36) 2]10- for highly efficient electrocatalytic water oxidation. Energy and Environmental Science, 6 (9), 2654-2663.

Scopus Eid


  • 2-s2.0-84882445181

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1672

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 2654

End Page


  • 2663

Volume


  • 6

Issue


  • 9

Place Of Publication


  • United Kingdom

Abstract


  • The electrochemistry of the Ru-containing polyoxometalate (POM) water oxidation molecular catalyst, Rb8K2[{Ru4O 4(OH)2(H2O)4}(γ-SiW 10O36)2]10- (Rb8K 2-1), has been studied by cyclic and rotating disk electrode voltammetric methods in aqueous media under acidic and neutral pH conditions using bare glassy carbon (GC) and graphene modified GC electrodes. High concentrations of supporting electrolyte are needed in neutral pH conditions to overcome the electrical double layer effect associated with the highly negatively charged 1. Complex 1 can be confined within the highly porous wet graphene film to form a stable modified electrode, which shows excellent catalytic activity and high stability toward the water oxidation reaction under neutral pH conditions, particularly in the presence of 1.0 M Ca(NO 3)2. The catalytic activity of the graphene supported 1 electrode is nearly two orders of magnitude higher than that reported with a polymer coated multiwalled carbon nanotube supported 1 electrode when both are employed at a moderate overpotential of 0.35 V. © 2013 The Royal Society of Chemistry.

UOW Authors


  •   Guo, Si Xuan. (external author)
  •   Liu, Yuqing (external author)
  •   Lee, Chong Yong
  •   Bond, Alan M. (external author)
  •   Zhang, Jie (external author)
  •   Geletii, Yurii V. (external author)
  •   Hill, Craig L. (external author)

Publication Date


  • 2013

Citation


  • Guo, S. Xuan., Liu, Y., Lee, C., Bond, A. M., Zhang, J., Geletii, Y. V. & Hill, C. L. (2013). Graphene-supported [{Ru4O4(OH)2(H 2O)4}(γ-SiW10O36) 2]10- for highly efficient electrocatalytic water oxidation. Energy and Environmental Science, 6 (9), 2654-2663.

Scopus Eid


  • 2-s2.0-84882445181

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1672

Has Global Citation Frequency


Number Of Pages


  • 9

Start Page


  • 2654

End Page


  • 2663

Volume


  • 6

Issue


  • 9

Place Of Publication


  • United Kingdom