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Contributions to activity enhancement via Fe incorporation in Ni-(oxy)hydroxide/borate catalysts for near-neutral pH oxygen evolution

Smith, Adam M ; Trotochaud, Lena ; Burke, Michaela S ; Boettcher, Shannon W

Chemical communications (Cambridge, England), 28 March 2015, Vol.51(25), pp.5261-3 [Rivista Peer Reviewed]

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  • Titolo:
    Contributions to activity enhancement via Fe incorporation in Ni-(oxy)hydroxide/borate catalysts for near-neutral pH oxygen evolution
  • Autore: Smith, Adam M ; Trotochaud, Lena ; Burke, Michaela S ; Boettcher, Shannon W
  • Note di contenuto: Ni-borate materials are oxygen evolution catalysts that operate at near-neutral pH and have been found previously to improve due to structural changes induced via anodic conditioning. We find that this increased activity after conditioning at 0.856 V vs. SCE, as measured on a turn-over frequency basis (TOF) at 400 mV overpotential (TOF = 0.38 s(-1)), accompanies significant Fe incorporation (14%). Films conditioned in Fe-free electrolyte exhibit ∼10 times lower activity (TOF = 0.03 s(-1)). By co-depositing Fe-Ni we demonstrate high activity without conditioning (TOF = 0.24 s(-1)) which improves further with shortened (∼30 min) conditioning (TOF = 1.4 s(-1)).
  • Fa parte di: Chemical communications (Cambridge, England), 28 March 2015, Vol.51(25), pp.5261-3
  • Lingua: Inglese
  • Tipo: Articolo
  • Identificativo: E-ISSN: 1364-548X ; PMID: 25579228 Version:1 ; DOI: 10.1039/c4cc08670h
  • Fonte: MEDLINE/PubMed (U.S. National Library of Medicine)

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