Jump to main content
Jump to site search


Hierarchical heterostructures NiCo2O4@CoMoO4/NF as efficient bifunctional electrocatalyst for overall water splitting

Abstract

Design of efficient and economical noble-metal-free bifunctional electrocatalysts for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) fulfills promise hydrogen production technologies through overall water splitting. Herein, hierarchical NiCo2O4@CoMoO4 on Ni foam (NF) was synthesized via a facile two-step method which involves hydrothermal and calcination processes. In addition, to explore mechanism for the growth of hierarchical NiCo2O4 @CoMoO4/NF nanostructures, variable time-dependent experiments were carried out. Results showed that optimal NiCo2O4@CoMoO4/NF-7 electrode exhibits superior electrocatalytic performance and excellent durability for OER, HER and overall water splitting, which presents a low overpotential of 265 mV at a current density of 20 mA cm-2 for OER and 121 mV at a current density of 10 mA cm-2 for HER in 1.0 M KOH. Meanwhile, when used as electrocatalyst electrode for overall water splitting, NiCo2O4@CoMoO4/NF-7 shows a quite low cell voltage of 1.55 V at 10 mA cm-2 and long-term durability during a 12 h stability test at a current density of 10 mA cm-2 in 1.0 M KOH. The study demonstrates that synergistic effects between NiCo2O4 and CoMoO4 in NiCo2O4@CoMoO4/NF heterostructures can effectively enhance electrochemistry performance and provides a wide range of posiblilities for further development inexpensive electrode materials for overall splitting.

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 May 2018, accepted on 08 Aug 2018 and first published on 08 Aug 2018


Article type: Paper
DOI: 10.1039/C8TA04325F
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
  •   Request permissions

    Hierarchical heterostructures NiCo2O4@CoMoO4/NF as efficient bifunctional electrocatalyst for overall water splitting

    Y. Gong, Y. Zhi, L. Yu, J. Wang, H. Pan and Z. Xu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA04325F

Search articles by author

Spotlight

Advertisements