Issue 11, 2018

Ultrafine molybdenum phosphide nanocrystals on a highly porous N,P-codoped carbon matrix as an efficient catalyst for the hydrogen evolution reaction

Abstract

High-performance and affordable electrocatalysts from earth-enriched materials are desirable for many sustainable energy conversion and storage systems. Highly crystalline MoP nanocrystals with ultrasmall sizes embedded in an N,P-codoped carbon matrix (MoP@NPCS) were designed and fabricated for hydrogen evolution. Due to the highly active catalytic nature of the MoP nanocrystals, the ultrasmall MoP nanoparticles on the conductive carbon matrix, the high surface area of the carbon matrix with abundant N and P dopants, and the strong coupling effect between the MoP nanoparticles and the carbon matrix, the designed MoP@NPCS catalysts show excellent hydrogen evolution behaviour, with an onset potential of −47 mV and an overpotential of 107 mV, to achieve a current density of 10 mA cm−2 in 1.0 M KOH, along with robust operational durability. Specially, the fabricated N,P-codoped carbon matrix (NPCS) exhibits high OER catalytic activity with an overpotential of 390 mV to afford 10 mA cm−2 and excellent stability. Finally, a two-electrode electrolyzer using MoP@NPCS and NPCS as the cathode and anode electrodes, respectively, requires a low voltage of 1.70 V to achieve 10 mA cm−2 over long-term operation. Due to this impressive performance, MoP@NPCS is a promising electrocatalyst for practical hydrogen production from electrocatalytic water splitting.

Graphical abstract: Ultrafine molybdenum phosphide nanocrystals on a highly porous N,P-codoped carbon matrix as an efficient catalyst for the hydrogen evolution reaction

Supplementary files

Article information

Article type
Research Article
Submitted
10 mai 2018
Accepted
22 jun 2018
First published
25 jun 2018

Mater. Chem. Front., 2018,2, 1987-1996

Ultrafine molybdenum phosphide nanocrystals on a highly porous N,P-codoped carbon matrix as an efficient catalyst for the hydrogen evolution reaction

J. Ren, L. Chen, C. Weng and Z. Yuan, Mater. Chem. Front., 2018, 2, 1987 DOI: 10.1039/C8QM00226F

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