A combined experimental and theoretical approach revealing a direct mechanism for bifunctional water splitting on doped copper phosphide

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 13
  • Download : 0
A cost-effective electrocatalyst should have a high dispersion of active atoms and a controllable surface structure to optimize activity. Additionally, bifunctional characteristics give an added benefit for the overall water splitting. Herein, we report the synthesis and fabrication of Fe-doped Cu/Cu3P supported on a flexible carbon cloth (CC) with a hydrophilic surface for efficient bifunctional water electrolysis under alkaline conditions. Surface doping of Fe in the hexagonal Cu3P does not alter the lattice parameters, but it promotes the surface metallicity by stimulating Cu delta+ and Cu-0 sites in Cu3P, resulting in an augmented electroactive surface area. Cu2.75Fe0.25P composition exhibits unprecedented OER activity with a low overpotential of 470 mV at 100 mA cm(-2). Under a two electrode electrolyzer system the oxygen and hydrogen gas was evolved with an unprecedented rate at their respective electrode made of same catalyst. Density functional theory further elucidates the role of the Fe center toward electronic state modulation, which eventually alters the entire adsorption behavior of the reaction intermediates and reduces the overpotential on Fe-doped system over pristine Cu3P.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2020-09
Language
English
Article Type
Article
Citation

NANOSCALE, v.12, no.34, pp.17769 - 17779

ISSN
2040-3364
DOI
10.1039/d0nr03414b
URI
http://hdl.handle.net/10203/276629
Appears in Collection
CH-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0