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Synergistic amplification of catalytic hydrogen generation by a thin-film conducting polymer composite

Journal Article


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Abstract


  • This work reports a composite of polyIJ3,4-ethylenedioxythiophene) (PEDOT) that is notably more catalytically

    active for hydrogen generation than the industry-standard benchmark catalyst, Pt, under the same

    conditions. A PEDOT thin-film containing nanoparticulate Ni (nano-Ni) and reduced graphene oxide (rGO)

    in the specific molar ratio of 5.6 (C; PEDOT) : 1 (Ni) : 5.2 (C; other), (photo)catalytically generated H2 at 3.6

    mA cm−2 (including ca. 0.2 mA cm−2 due to the light illumination) after 3 h at −0.75 V (vs. Ag/AgCl) in 0.05

    M H2SO4/0.2 M Na2SO4 under 0.25 sun. A control nano-Ni/rGO film containing the same quantities of

    nano-Ni and rGO but without any PEDOT, yielded 2.1 mA cm−2, indicating that the PEDOT synergistically

    amplified the above result by 71%. Other ratios of the above PEDOT composite produced notably lower

    activities. Control PEDOT, PEDOT/nano-Ni, and PEDOT/rGO films were an order of magnitude less catalytically

    active. A control bare Pt electrode produced only 2.2 mA cm−2 under the same conditions. Studies

    suggested the origin of the synergistic amplification to involve the PEDOT electrically connecting the largest

    number of active sites by the shortest, most efficient pathways for hole transport. These results confirm

    the proposition that thin-film conducting polymers involving very specific, optimum ratios of catalyst density

    to thickness may synergistically amplify catalysis.

UOW Authors


  •   Alsultan, Mohammed (external author)
  •   Choi, Jaecheol (external author)
  •   Jalili, Rouhollah (external author)
  •   Wagner, Pawel
  •   Swiegers, Gerhard

Publication Date


  • 2018

Citation


  • Alsultan, M., Choi, J., Jalili, R., Wagner, P. & Swiegers, G. F. (2018). Synergistic amplification of catalytic hydrogen generation by a thin-film conducting polymer composite. Catalysis Science & Technology, 8 (16), 4169-4179.

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4275&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3224

Number Of Pages


  • 10

Start Page


  • 4169

End Page


  • 4179

Volume


  • 8

Issue


  • 16

Place Of Publication


  • United Kingdom

Abstract


  • This work reports a composite of polyIJ3,4-ethylenedioxythiophene) (PEDOT) that is notably more catalytically

    active for hydrogen generation than the industry-standard benchmark catalyst, Pt, under the same

    conditions. A PEDOT thin-film containing nanoparticulate Ni (nano-Ni) and reduced graphene oxide (rGO)

    in the specific molar ratio of 5.6 (C; PEDOT) : 1 (Ni) : 5.2 (C; other), (photo)catalytically generated H2 at 3.6

    mA cm−2 (including ca. 0.2 mA cm−2 due to the light illumination) after 3 h at −0.75 V (vs. Ag/AgCl) in 0.05

    M H2SO4/0.2 M Na2SO4 under 0.25 sun. A control nano-Ni/rGO film containing the same quantities of

    nano-Ni and rGO but without any PEDOT, yielded 2.1 mA cm−2, indicating that the PEDOT synergistically

    amplified the above result by 71%. Other ratios of the above PEDOT composite produced notably lower

    activities. Control PEDOT, PEDOT/nano-Ni, and PEDOT/rGO films were an order of magnitude less catalytically

    active. A control bare Pt electrode produced only 2.2 mA cm−2 under the same conditions. Studies

    suggested the origin of the synergistic amplification to involve the PEDOT electrically connecting the largest

    number of active sites by the shortest, most efficient pathways for hole transport. These results confirm

    the proposition that thin-film conducting polymers involving very specific, optimum ratios of catalyst density

    to thickness may synergistically amplify catalysis.

UOW Authors


  •   Alsultan, Mohammed (external author)
  •   Choi, Jaecheol (external author)
  •   Jalili, Rouhollah (external author)
  •   Wagner, Pawel
  •   Swiegers, Gerhard

Publication Date


  • 2018

Citation


  • Alsultan, M., Choi, J., Jalili, R., Wagner, P. & Swiegers, G. F. (2018). Synergistic amplification of catalytic hydrogen generation by a thin-film conducting polymer composite. Catalysis Science & Technology, 8 (16), 4169-4179.

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=4275&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3224

Number Of Pages


  • 10

Start Page


  • 4169

End Page


  • 4179

Volume


  • 8

Issue


  • 16

Place Of Publication


  • United Kingdom