Hydrogen Bubble Templating of Fractal Ni catalyst for Water Oxidation in Alkaline Media

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dc.contributor.authorHao, M.
dc.contributor.authorCharbonneau, V.
dc.contributor.authorFomena, N.N.
dc.contributor.authorGaudet, J.
dc.contributor.authorBruce, D.R.
dc.contributor.authorGarbarino, S.
dc.contributor.authorHarrington, David A.
dc.contributor.authorGuay, D.
dc.date.accessioned2020-02-28T20:44:00Z
dc.date.copyright2019en_US
dc.date.issued2019
dc.description.abstractDynamic hydrogen bubble templating of Ni (NiDHBT) electrodes was used to prepare highly porous films with enhanced properties toward the oxygen evolution reaction (OER). Upon varying the electrodeposition conditions, Ni films with a macroporous primary structure and highly porous cauliflowerlike secondary structure were formed. These films are able to develop an extended electrochemically active surface area, up to 270-fold increase compared to a Ni plate. They exhibit stable overpotential (η250 = 540 mV) at j = 250 mA cmgeometric–2 in 1 M KOH electrolyte, which is 300 mV less positive than at the Ni plate. Fe incorporation onto these NiDHBT structures can further lower OER overpotentials to η250 = 310 mV. NiDHBT films are remarkably stable over prolonged polarization and are characterized by a low Tafel slope (29 mV/decade) that extends up to j = 100 mA cmgeometric–2, attributed to both superaerophobic characteristics with a contact angle of ca. 160° between the surface and an air bubble and superhydrophilic characteristics with less than 25° between the surface and a water droplet.en_US
dc.description.embargo2020-08-01
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis research was conducted as part of the Engineered Nickel Catalysts for Electrochemical Clean Energy project administered from Queen’s University and supported by Grant No. RGPNM 477963-2015 under the Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Frontiers Program. One of us (V.C.) would also like to acknowledge the Natural Sciences and Engineering Research Council (NSERC) for an Undergraduate Research Award.en_US
dc.identifier.citationHao, M., Charbonneau, V., Fomena, N.N., Gaudet, J., Bruce, D.R., Garbarino, S., Harrington, D.A. & Guay, D. (2019). Hydrogen Bubble Templating of Fractal Ni catalyst for Water Oxidation in Alkaline Media. ACS Applied Energy Materials, 2(8), 5734-5743. https://doi.org/10.1021/acsaem.9b00860en_US
dc.identifier.urihttps://doi.org/10.1021/acsaem.9b00860
dc.identifier.urihttp://hdl.handle.net/1828/11593
dc.language.isoenen_US
dc.publisherACS Applied Energy Materialsen_US
dc.subjectBubblesen_US
dc.subjectRadiologyen_US
dc.subjectElectrical propertiesen_US
dc.subjectElectrodesen_US
dc.subjectDepositionen_US
dc.titleHydrogen Bubble Templating of Fractal Ni catalyst for Water Oxidation in Alkaline Mediaen_US
dc.typePostprinten_US

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