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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, 2015, Vol.51(25), pp.5261-5263 [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: Niborate 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 FeNi 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, 2015, Vol.51(25), pp.5261-5263
  • Tipo: Articolo
  • Identificativo: ISSN: 1359-7345 ; E-ISSN: 1364-548X ; DOI: 10.1039/c4cc08670h
  • Fonte: Royal Society of Chemistry

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