Issue 5, 2020

Vertical kinetically oriented MoS2–Mo2N heterostructures on carbon cloth: a highly efficient hydrogen evolution electrocatalyst

Abstract

Rationally designed nanostructures can synergistically provide more active sites to optimize the electrocatalytic properties and decrease the energy barrier of the hydrogen evolution reaction (HER). Although MoS2 is a promising two dimensional (2D) electrocatalyst, the curved nanoplates adversely affect the delivery of H2 during the HER. Herein, kinetically oriented MoS2 nanoflakes are prepared vertically on Mo2N nanoneedles anchored on flexible carbon cloth (MoS2–Mo2N/CC). The three-dimensional (3D) skeleton composed of carbon cloth (CC) and Mo2N prevents collapse of MoS2 during fabrication and electrochemical reactions. Moreover, the strong electronic interactions between MoS2 and Mo2N enhance charge transfer, moderate the hydrogen binding energy, and decrease the reaction energy thermodynamically. MoS2–Mo2N/CC delivers moderate hydrogen binding energy and fast H2 desorption further enhancing the HER activity. Owing to the optimized hybrid structure, MoS2–Mo2N/CC exhibits a small overpotential of 121 mV at 10 mA cm−2, small Tafel slope of 49.6 mV dec−1, and outstanding stability of 97.4% at 50 mA cm−2. The results reveal the large potential of vertically oriented HER catalysts in energy storage and conversion.

Graphical abstract: Vertical kinetically oriented MoS2–Mo2N heterostructures on carbon cloth: a highly efficient hydrogen evolution electrocatalyst

Supplementary files

Article information

Article type
Paper
Submitted
03 جمادى الثانية 1441
Accepted
02 رجب 1441
First published
03 رجب 1441

Sustainable Energy Fuels, 2020,4, 2201-2207

Vertical kinetically oriented MoS2–Mo2N heterostructures on carbon cloth: a highly efficient hydrogen evolution electrocatalyst

C. Huang, Q. Ruan, H. Song, Y. Luo, H. Bai, B. Gao and P. K. Chu, Sustainable Energy Fuels, 2020, 4, 2201 DOI: 10.1039/D0SE00144A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements