Jump to main content
Jump to site search


Graphitized Carbon-Coated Vanadium Carbide Nanoboscages Modified by Nickel with Enhanced Electrocatalytic Activity for Hydrogen Evolution in both Acid and Alkaline Solution

Abstract

Developing active and stable electrocatalysts based on earth-abundant element for water splitting is an important challenge for effcient energy conversion and storage. Herein, a controllable structure-engineering to construct 3-dimensional (3D) vanadium carbide (VC) nanoboscages with graphitic carbon coating is reported by inventively employing Ni as a crystalline inducer. The incorporation of Ni at the atom scale in the vanadate precursor not only promotes the generation of active VC during the carbonization process but also catalyzes the in-situ formation of graphitized carbon on the surface of the VC to construct a carbon coating. Due to the excellent electronic properties of active sites and improved charge and mass transport capability derived from the unique structure and morphology, the Ni-VC@C samples are endowed with favorable catalytic activities. The optimized Ni-VC@C achieves high HER efficiencies in both acid (η@10mA/cm2=138 mV) and alkaline (η@10mA/cm2=146 mV) environment with excellent stability, surpassing those carbide based HER catalysts reported previously. The “metal induced crystallization” strategy for preparing such nanostructures opens up opportunities for exploring low-cost, high performance electrocatalysts for various applications.

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Aug 2017, accepted on 27 Sep 2017 and first published on 27 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA07275A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
  •   Request permissions

    Graphitized Carbon-Coated Vanadium Carbide Nanoboscages Modified by Nickel with Enhanced Electrocatalytic Activity for Hydrogen Evolution in both Acid and Alkaline Solution

    L. Peng, J. Shen, L. Zhang, Y. Wang, R. Xiang, J. Li, L. Li and Z. Wei, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA07275A

Search articles by author

Spotlight

Advertisements