Publications

Detailed Information

Lattice Strain Formation through Spin-Coupled Shells of MoS2 on Mo2C for Bifunctional Oxygen Reduction and Oxygen Evolution Reaction Electrocatalysts

Cited 50 time in Web of Science Cited 49 time in Scopus
Authors

Tiwari, Anand P.; Yoon, Yeoheung; Novak, Travis G.; Azam, Ashraful; Lee, Minhe; Lee, Sun Sook; Lee, Gwan-hyoung; Srolovitz, David J.; An, Ki-Seok; Jeon, Seokwoo

Issue Date
2019-11
Publisher
John Wiley and Sons Ltd
Citation
Advanced Materials Interfaces, Vol.6 No.22, p. 1900948
Abstract
Identifying effective means to improve the electrocatalytic performance of transition metal dichalcogenides in alkaline electrolytes is a significant challenge. Herein, an advanced electrocatalyst possessing shells of molybdenum disulfide (MoS2) on molybdenum carbide (Mo2C) for efficient electrocatalytic activity in alkaline electrolytes is reported. The strained sheets of curved MoS2 surround the surface of Mo2C, turning the inactive basal planes of MoS2 into highly active electrocatalytic sites in the alkaline electrolyte. The van der Waals layers, which even possess van der Waals epitaxy along (100) facets of MoS2 and Mo2C, enhance the spin coupling between MoS2 and Mo2C, providing an easy electron transfer path for excellent electrocatalytic activity in alkaline electrolytes and solving the stability issue. In addition, it is found that curved MoS2 sheets on Mo2C show 3.45% tensile strain in the lattice, producing excellent catalytic activity for both oxygen reduction reaction (ORR) (with E-1/2 = 0.60 V vs RHE) and oxygen evolution reaction (OER) (overpotential = 1.51 V vs RHE at 10 mA cm(-2)) with 60 times higher electrochemical active area than pristine MoS2. The unique structure and synthesis route outlined here provide a novel and efficient approach toward designing highly active, durable, and cost-effective ORR and OER electrocatalysts.
ISSN
2196-7350
URI
https://hdl.handle.net/10371/202094
DOI
https://doi.org/10.1002/admi.201900948
Files in This Item:
There are no files associated with this item.
Appears in Collections:

Related Researcher

  • College of Engineering
  • Department of Materials Science & Engineering
Research Area 2D materials, 2D crystal structures , 2D materials and fabrication processing, Advanced battery materials, Next-generation electronic devices

Altmetrics

Item View & Download Count

  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Share