4.6 Article

NiCoSe2-x/N-doped C mushroom-like core/shell nanorods on N-doped carbon fiber for efficiently electrocatalyzed overall water splitting

Journal

ELECTROCHIMICA ACTA
Volume 272, Issue -, Pages 161-168

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.04.032

Keywords

N-doped carbon; Nickel-cobalt diselenide; Core/shell nanorod; Selenization; Overall water splitting

Funding

  1. National Natural Science Foundation of China (NSFC) [51573166]
  2. Fundamental Research Funds for the Central Universities [JB171401]
  3. Starting Research Fund of Xidian University [10251170002]

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Developing stable and efficient bifunctional catalysts for overall water splitting is a critical step in the production of renewable energy sources. Here we report a stable and highly active electrocatalyst comprised of NiCoSe2-x/N-doped carbon mushroom-like core/shell nanorods on silk-derived carbon fiber through one step selenization. The unique one-dimensional nanorod structure facilitates the charge transport, and the N-doped carbon shell also increases the electrical conductivity, resulting in a remarkable enhancement of the catalytic activity. The N-doped carbon shell also functions as a protection layer. The composite catalyst therefore exhibits outstanding OER and HER performance, it can also stably drive the overall water splitting at a low cell voltage of 1.53 V in base solution. The present work provides an efficient strategy for the fabrication of stable and active electrocatalysts with earth-abundant elements. (C) 2018 Elsevier Ltd. All rights reserved.

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