articleAdvanced Functional MaterialsApr 9, 2016Closed access

Hierarchical NiCo 2 S 4 Nanowire Arrays Supported on Ni Foam: An Efficient and Durable Bifunctional Electrocatalyst for Oxygen and Hydrogen Evolution Reactions

ASArumugam SivananthamPGP. GanesanSSSangaraju Shanmugam

Daegu Gyeongbuk Institute of Science and Technology

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Abstract

A recent approach for solar‐to‐hydrogen generation has been water electrolysis using efficient, stable, and inexpensive bifunctional electrocatalysts within strong electrolytes. Herein, the direct growth of 1D NiCo 2 S 4 nanowire (NW) arrays on a 3D Ni foam (NF) is described. This NiCo 2 S 4 NW/NF array functions as an efficient bifunctional electrocatalyst for overall water splitting with excellent activity and stability. The 3D‐Ni foam facilitates the directional growth, exposing more active sites of the catalyst for electrochemical reactions at the electrode–electrolyte interface. The binder‐free, self‐made NiCo 2 S 4 NW/NF electrode delivers a hydrogen production current density of 10 mA cm –2 at an…

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Topics & keywords

Topics
Keywords
  • Electrocatalyst
  • Bifunctional
  • Overpotential
  • Oxygen evolution
  • Water splitting
  • Materials science
  • Electrolyte
  • Electrolysis
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