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Anodization in KBi.opj

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CVs after putting in clean buffer.opj

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Multiple Washings.opj

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Washed single.opj

full_archive archive 10322 disk0/00/00/02/27 2015-10-20 17:27:03 2025-09-29 08:22:44 2015-10-28 09:54:40 data_collection show Symes M.D. 15851 Roger Barba I. glaresearchdata:2015-10-22-227 pub 30100000 Electrolytic water oxidation using earth-abundant elements is a key challenge in the quest to develop cheap, large surface area arrays for solar-to-hydrogen conversion. There have been numerous studies in this area in recent years, but there remains an imperative to demonstrate that the current densities reported are indeed due to the species under consideration, and not due to the presence of adventitious (yet possibly highly active) contaminants at low levels. Herein, we show that adventitious nickel at concentrations as low as 17 nM can act as a water oxidation catalyst in mildly basic aqueous solutions, achieving stable (tens of hours) current densities of 1 mA / cm2 at overpotentials as low as 540 mV at pH 9.2 and 400 mV at pH 13. This nickel was not added to the electrolysis baths deliberately, but was found to be present in the electrolytes as an impurity by ICP-MS. The presence of nickel on anodes from extended-time bulk electrolysis experiments was confirmed by XPS. In showing that such low levels of nickel can perform water oxidation at overpotentials comparable to many recently-reported water oxidation catalysts, this work serves to raise the burden of proof required of new materials in this field: contamination by adventitious metal ions at trace loadings must be excluded as a possible cause of any observed water oxidation activity. 2015-10-22 published University of Glasgow 10.5525/gla.researchdata.227 Other University of Glasgow 62131 1 Upgrading the small scale equipment base for early career researchers in the engineering and physical sciences Miles Padgett Engineering & Physical Sciences Research Council (EPSRC) EP/K031732/1 S&E P&A - PHYSICS & ASTRONOMY Data files were produced using OriginPro 8.5 analysis software (www.originlab.com) FALSE en The data are licensed under CC BY-SA 4.0 http://dx.doi.org/10.1021/jacs.5b08139 article 2035-09-30 R 2025-09-29 AA: Previous retention date 2025-10-22. Extended to 10 years from last access. FALSE FALSE http://eprints.gla.ac.uk/id/eprint/111301