Developing low cost, highly active and stable electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) using the same electrolyte has remained a major challenge. Herein, we report a novel and robust material comprised of Nickel-Cobalt nanoparticles coated on a porous nitrogen-doped carbon (NC) thin film synthesized via a two-step pulsed laser deposition technique. The optimized sample (Ni0.5Co0.5/NC) achieved lowest overpotentials of 176 mV and 300 mV at a current density of 10 mAcm-2 for HER and OER, respectively. The optimized OER activity might be attributed to the available metal oxide nanoparticles with effective electronic structure configuration and enhanced mass/charge transport capability. At the same time, the porous nitrogen doped carbon incorporated with cobalt and nickel species can serve as an excellent HER catalyst. As a result, the newly developed electrocatalysts manifest high current densities and strong electrochemical stability in overall water splitting, outperforming most of the previously reported non-precious metal-based catalysts.

Highly active nickel–cobalt/nanocarbon thin films as efficient water splitting electrodes

RUSSO, VALERIA;CASARI, CARLO SPARTACO;
2016-01-01

Abstract

Developing low cost, highly active and stable electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) using the same electrolyte has remained a major challenge. Herein, we report a novel and robust material comprised of Nickel-Cobalt nanoparticles coated on a porous nitrogen-doped carbon (NC) thin film synthesized via a two-step pulsed laser deposition technique. The optimized sample (Ni0.5Co0.5/NC) achieved lowest overpotentials of 176 mV and 300 mV at a current density of 10 mAcm-2 for HER and OER, respectively. The optimized OER activity might be attributed to the available metal oxide nanoparticles with effective electronic structure configuration and enhanced mass/charge transport capability. At the same time, the porous nitrogen doped carbon incorporated with cobalt and nickel species can serve as an excellent HER catalyst. As a result, the newly developed electrocatalysts manifest high current densities and strong electrochemical stability in overall water splitting, outperforming most of the previously reported non-precious metal-based catalysts.
2016
NITROGEN-DOPED CARBON; ELECTROCATALYTIC HYDROGEN EVOLUTION; PULSED-LASER DEPOSITION; OXYGEN EVOLUTION; NANOWIRE ARRAYS; FUEL-CELLS; IN-SITU; OXIDE; CATALYSTS; NANOSHEETS
File in questo prodotto:
File Dimensione Formato  
MS-Submitted.pdf

accesso aperto

Descrizione: articolo principale
: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 1.65 MB
Formato Adobe PDF
1.65 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1011215
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 51
  • ???jsp.display-item.citation.isi??? 51
social impact