Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 114, Issue 34, Pages 8986-8990Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1710443114
Keywords
hydrogen evolution reaction; dual-pulse plating; nickel/nickel hydroxide interface; graphite rod electrode
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Funding
- University Grants Commission of India for a fellowship
- Department of Science and Technology, India [SR/NM/Z-07/2015]
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Electrochemical dual-pulse plating with sequential galvanostatic and potentiostatic pulses has been used to fabricate an electrocatalytically active Ni/Ni(OH)(2)/graphite electrode. This electrode design strategy to generate the Ni/Ni(OH)(2) interface on graphite from Ni deposits is promising for electrochemical applications and has been used by us for hydrogen generation. The synergetic effect of nickel, colloidal nickel hydroxide islands, and the enhanced surface area of the graphite substrate facilitating HO-H cleavage followed by H(ad) recombination, results in the high current density [200 mA/cm(2) at an overpotential of 0.3 V comparable to platinum (0.44 V)]. The easy method of fabrication of the electrode, which is also inexpensive, prompts us to explore its use in fabrication of solar-driven electrolysis.
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