Jump to main content
Jump to site search

Issue 44, 2017
Previous Article Next Article

Engineering Co9S8/WS2 array films as bifunctional electrocatalysts for efficient water splitting

Author affiliations

Abstract

An elaborate design of highly active, low-cost and durable bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) in water splitting is undoubtedly vital but challenging to develop the hydrogen economy. Herein, we report a novel kind of three-dimensional Co9S8/WS2 electrocatalyst with array structures as efficient bifunctional electrocatalysts for overall water splitting. The resulting hierarchically Co9S8/WS2, as a robust integrated 3D hydrogen-evolving electrode, can deliver a current density of 10 mA cmgeometric area−2 at an overpotential of 138 mV in alkaline media, together with high stability. Combined with density functional theory calculations, the superior electrocatalytic activity is attributed to the unique structures and synergistic effect of chemical and electronic couplings between Co9S8 and WS2. Furthermore, this bifunctional electrode enables a high-performance alkaline water electrolyzer with 10 mA cm−2 at a cell voltage of 1.65 V. Therefore, this unique 3D architecture opens an exciting new avenue to explore the use of composite sulfides toward full water splitting.

Graphical abstract: Engineering Co9S8/WS2 array films as bifunctional electrocatalysts for efficient water splitting

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Sep 2017, accepted on 04 Oct 2017 and first published on 04 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA08518D
Citation: J. Mater. Chem. A, 2017,5, 23361-23368
  •   Request permissions

    Engineering Co9S8/WS2 array films as bifunctional electrocatalysts for efficient water splitting

    S. Peng, L. Li, J. Zhang, T. L. Tan, T. Zhang, D. Ji, X. Han, F. Cheng and S. Ramakrishna, J. Mater. Chem. A, 2017, 5, 23361
    DOI: 10.1039/C7TA08518D

Search articles by author

Spotlight

Advertisements