Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



FeS2 Crystal Lattice Promotes Nanostructure and Enhances Electrocatalytic Performance of WS2 Nanosheet for Oxygen Evolution Reaction

Abstract

The control of surface elements and nanostructures is one of the effective ways to design and synthesize high performance catalysts. Herein, we, for the first time, prepare FeS2 crystal lattice on WS2 nanosheet (FeS2 CL@WS2 NS) by solvothermal methods for oxygen evolution reaction (OER). FeS2 CL effectively prevents the oxidation and aggregation of WS2 nanosheets and increases electrochemical active surface area. The abundant surface defect in FeS2 CL@WS2 NS electrocatalyst reduces the stress between crystal lattices of FeS2 and that of WS2. The overpotential (260 mV) of FeS2 CL@WS2 NS electrocatalyst for OER at a current density of 10 mA cm−2 is superior to that of WS2 NS/Ni foam (310 mV) and IrO2/Ni foam (300 mV) in 1.0 M KOH solution. Electrochemical-kinetic study shows that the tafel slope of 54 mV/decade for FeS2 CL@WS2 NS electrocatalyst is lower than those of WS2 NS (102 mV/decade) and IrO2/Ni foam (77 mV/decade). In addition, the charge transport resister (2.3 Ω) of FeS2 CL@WS2 NS electrocatalyst for OER is smaller than that of WS2 NS. These faster kinetics properties, in turn, explain the high catalytic activity of FeS2 CL@WS2 NS electrocatalyst for OER. The XPS and HRTEM results of post stability sample confirm that Fe2+, W4+ are oxidized after durability measurement. Thus, we think that FeS2 CL@WS2 NS electrocatalyst is a promising candidate for efficient, low-cost, and stable non-noble-metal-based OER electrocatalysts.

Back to tab navigation

Supplementary files

Article information


Submitted
07 May 2020
Accepted
23 Jun 2020
First published
24 Jun 2020

Dalton Trans., 2020, Accepted Manuscript
Article type
Paper

FeS2 Crystal Lattice Promotes Nanostructure and Enhances Electrocatalytic Performance of WS2 Nanosheet for Oxygen Evolution Reaction

G. Zhang, Z. Hao, J. Yin, C. Wang, J. Zhang, Z. Zhao, D. Wei, H. Zhou and Z. Li, Dalton Trans., 2020, Accepted Manuscript , DOI: 10.1039/D0DT01660H

Social activity

Search articles by author

Spotlight

Advertisements