Journal
CHEMICAL COMMUNICATIONS
Volume 51, Issue 25, Pages 5261-5263Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cc08670h
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Funding
- National Science Foundation [CHE-1301461]
- W. M. Keck Foundation
- M. J. Murdock Charitable Trust
- ONAMI
- Air Force Research Laboratory [FA8650-051-5041]
- NSF [236200]
- University of Oregon
- Research Corporation for Science Advancement as a Cottrell Scholar
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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 over-potential (TOF = 0.38 s(-1)), accompanies significant Fe incorporation (14%). Films conditioned in Fe-free electrolyte exhibit similar to 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 (similar to 30 min) conditioning (TOF = 1.4 s(-1)).
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