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  • Aftab, UmairDepartment of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro, Sindh, 76080, Pakistan,Mehran Univ Engn & Technol, Pakistan (författare)

Two step synthesis of TiO2–Co3O4 composite for efficient oxygen evolution reaction

  • Artikel/kapitelEngelska2021

Förlag, utgivningsår, omfång ...

  • Elsevier,2021
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:ltu-82713
  • https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-82713URI
  • https://doi.org/10.1016/j.ijhydene.2020.12.204DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-174123URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

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Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Validerad;2021;Nivå 2;2021-03-22 (johcin);Finansiär: Higher Education of Pakistan, King Saud University (RSP-2021/79)
  • Funding Agencies|Higher Education of PakistanHigher Education Commission of Pakistan [RSP-2021/79]; King Saud University, Riyadh, Saudi ArabiaKing Saud University
  • For an active hydrogen gas generation through water dissociation, the sluggish oxygen evolution reaction (OER) kinetics due to large overpotential is a main hindrance. Herein, a simple approach is used to produce composite material based on TiO2/Co3O4 for efficient OER and overpotential is linearly reduced with increasing amount of TiO2. The scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) investigations reveal the wire like morphology of composite materials, formed by the self-assembly of nanoparticles. The titania nanoparticles were homogenously distributed on the larger Co3O4 nanoparticles. The powder x-ray diffraction revealed a tetragonal phase of TiO2 and the cubic phase of Co3O4 in the composite materials. Composite samples with increasing TiO2 content were obtained (18%, 33%, 41% and 65% wt.). Among the composites, cobalt oxide-titanium oxide with the highest TiO2 content (CT-20) possesses the lowest overpotential for OER with a Tafel slope of 60 mV dec−1 and an exchange current density of 2.98 × 10−3A/cm2. The CT-20 is highly durable for 45 h at different current densities of 10, 20 and 30 mA/cm2. Electrochemical impedance spectroscopy (EIS) confirmed the fast charge transport for the CT-20 sample, which potentially accelerated the OER kinetics. These results based on a two-step methodology for the synthesis of TiO2/Co3O4 material can be useful and interesting for various energy storage and energy conversion systems.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Tahira, AneelaLinköpings universitet,Fysik, elektroteknik och matematik,Tekniska fakulteten(Swepub:liu)aneta18 (författare)
  • Gradone, AlessandroCNR-IMM, Via Piero Gobetti 101, Bologna, 40129, Italy. Chemistry Department “G.Ciamician”, University of Bologna, Bologna, 40126, Italy,CNR IMM, Italy; Univ Bologna, Italy (författare)
  • Morandi, VittorioCNR-IMM, Via Piero Gobetti 101, Bologna, 40129, Italy (författare)
  • Abro, Muhammad IshaqDepartment of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro, Sindh, 76080, Pakistan,Mehran Univ Engn & Technol, Pakistan (författare)
  • Baloch, Muhammad MoazamDepartment of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro, Sindh, 76080, Pakistan,Mehran Univ Engn & Technol, Pakistan (författare)
  • Bhatti, Adeel LiaquatInstitute of Physics University of Sindh, Jamshoro, Sindh, 76080, Pakistan,Univ Sindh, Pakistan (författare)
  • Nafady, AymanDepartment of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia,King Saud Univ, Saudi Arabia (författare)
  • Vomiero, AlbertoLuleå tekniska universitet,Materialvetenskap,Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, Via Torino 155, Venezia, Mestre, 30172, Italy,Lulea Univ Technol, Sweden; Ca Foscari Univ Venice, Italy(Swepub:ltu)albvom (författare)
  • Ibupoto, Zafar HussainDr. M.A Kazi Institute of Chemistry University of Sindh, Jamshoro, Sindh, 76080 Pakistan,Univ Sindh, Pakistan (författare)
  • Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro, Sindh, 76080, PakistanMehran Univ Engn & Technol, Pakistan (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:International journal of hydrogen energy: Elsevier46:13, s. 9110-91220360-31991879-3487

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