Journal
CARBON
Volume 144, Issue -, Pages 764-771Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2018.12.106
Keywords
Noble-metal-free catalyst; Transition metal; Electrode material; Sustainable energy; Energy conversion; Water electrolysis
Funding
- Center of Excellence in Nanotechnology through NT-2018-MQ at King Fahd University of Petroleum and Minerals
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Supports play crucial role in determining the catalytic activity, selectivity and overall performance of the supported catalytic nanoassemblies. Herein, ultrathin interconnected carbon nanosheets (CN) are prepared and used as a robust support for dispersion of iron phosphide (FeP) nanoparticles, and the resulting catalytic system is evaluated as low-cost electrocatalyst for hydrogen evolution reaction (HER). Carbon is derived from carbonization of sodium citrate in one-step, which is interconnected and in the form of ultrathin nanosheets (thickness <5 nm) with high surface area. Such morphological features of carbon steered the growth of small FeP nanocrystals with better dispersion qualities. As a result, the electrode comprising FeP-modified ultrathin interconnected carbon nanosheets (FeP/CN) exhibits excellent HER performance both in acidic and basic electrolytes; requires small onset and overpotential, and possesses high turnover frequency (TOF), in addition to excellent operational stability. The performance of FeP/CN electrode is compared with that of commercial carbon-supported platinum (Pt/C) and supportless FeP nanoparticles. Superior performance of the electrode comprising FeP/CN is correlated to specific surface area, electrochemically active surface area, interfacial charge transfer resistance and TOF. (C) 2018 Elsevier Ltd. All rights reserved.
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