Tailoring of cobalt phosphide anchored nitrogen and sulfur co-doped three dimensional graphene hybrid: Boosted electrocatalytic performance towards hydrogen evolution reaction

KARAMAN C., KARAMAN O., ATAR N., Yola M. L.

ELECTROCHIMICA ACTA, cilt.380, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 380
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.electacta.2021.138262
  • Dergi Adı: ELECTROCHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Cobalt phosphide, Electrocatalysts, Hydrogen evolution reaction, Non-precious metal, Three-dimensional graphene, BIFUNCTIONAL ELECTROCATALYSTS, EFFICIENT ELECTROCATALYST, CATALYTIC-ACTIVITY, OXYGEN REDUCTION, CARBON NANOTUBES, NANOPARTICLES, MOS2, NANOSHEETS
  • Akdeniz Üniversitesi Adresli: Evet

Özet

The tailoring of a high-performance, low-cost hybrid electrocatalysts with excellent stability in acidic media for hydrogen evolution reaction (HER) has gain paramount importance. Herein, the cobalt phosphide decorated nitrogen and sulfur co-doped three dimensional graphene (CoP@N,S-3D-GN) electrocatalyst was synthesized via a simple two step production pathway including hydrothermal self-assembly and low-temperature phosphidation. Compared both with CoP-anchored 3D-GN (CoP@3D-GN) and N,S-co-doped 3D-GN (N,S-3D-GN) samples, profiting from the synergistic merits of co-doping and metal phosphide, CoP@N,S-3D-GN delivers boosted electrocatalytic activity towards HER with an overpotential of only 118 mV at 10 mA.cm(-2), a Tafel slope of 50 mV.dec(-1) and an exchange current density of 2.2 x 10(-2) mA.cm(-2). Furthermore, it preserves its electrocatalytic activity for both after 1000 cyclic voltammetry cycles at 100 mV.s(-1) potential scan rate and at least 50 h under 120 mV overpotential. This work provides rational route for engineering of metal phosphides anchored 3D-graphene hybrid electrocatalysts to boost the HER catalytic performance. (C) 2021 Elsevier Ltd. All rights reserved.