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Nano Research 2018, 11(9): 4535-4548 https://doi.org/10.1007/s12274-018-2034-8
Research Article | Issue | Published: 16 March 2018

A strategy for highly dispersed Mo2C/MoN hybrid nitrogen-doped graphene via ion-exchange resin synthesis for efficient electrocatalytic hydrogen reduction

Show Author's Information Jiabo Wang1,  Weilin Chen1( ),  Ting Wang1,  Nasen Bate2,  Chunlei Wang3,  Enbo Wang1( )
Key Laboratory of Polyoxometalate Science of the Ministry of EducationFaculty of ChemistryNortheast Normal UniversityChangchun130024China
Autonomous Region Level Experimental Teaching Demonstration CenterYili Normal UniversityYining835000China
Library of Northeast Normal UniversityChangchun130024China
Keywords:
electrocatalyst, hydrogen evolution reaction, polymolybdate, ion exchange, Tafel slope
Cite this article:
Wang J, Chen W, Wang T, et al. A strategy for highly dispersed Mo2C/MoN hybrid nitrogen-doped graphene via ion-exchange resin synthesis for efficient electrocatalytic hydrogen reduction. Nano Research, 2018, 11(9): 4535-4548. https://doi.org/10.1007/s12274-018-2034-8
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Abstract Full text About this article

Molybdenum carbide/molybdenum nitride hybrid N-doped graphene (abbreviated as Mo2C/MoN/NG), as an efficient electrocatalyst for the hydrogen evolution reaction (HER), was synthesized via simple ion-exchange resin synthesis followed by a two-step annealing process, which increased the dispersion degree of the electrocatalyst's active sites on the support skeleton and simplified the synthetic conditions. Additionally, N-doped graphene (NG) enhanced the electron transfer and reduced the inner resistance. The material has a graphene-like morphology and highly dispersed Mo2C/MoN nanoparticles about 2 nm in diameter on the NG. X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy revealed that Mo2C/MoN/NG consisted of Mo2C and MoN composited together. Finally, Mo2C/MoN/NG exhibited remarkable performance as an electrocatalyst for the HER with a small overpotential of 78.82 mV and a small Tafel slope of 39.3 mV·dec-1 in a 0.5 mol·L-1 H2SO4 solution. Its activity was approximately 30% lower than that of 20% Pt/C and 60% higher than that of NG. Also, it exhibited a low onset overpotential of 24.82 mV, which is similar to the theoretical HER potential. Our work provides a foundation for advanced HER applications of molybdenum compounds.


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About this article

A strategy for highly dispersed Mo2C/MoN hybrid nitrogen-doped graphene via ion-exchange resin synthesis for efficient electrocatalytic hydrogen reduction

Show Author's information Jiabo Wang1, Weilin Chen1( ), Ting Wang1, Nasen Bate2, Chunlei Wang3, Enbo Wang1( )
Key Laboratory of Polyoxometalate Science of the Ministry of EducationFaculty of ChemistryNortheast Normal UniversityChangchun130024China
Autonomous Region Level Experimental Teaching Demonstration CenterYili Normal UniversityYining835000China
Library of Northeast Normal UniversityChangchun130024China

Abstract

Molybdenum carbide/molybdenum nitride hybrid N-doped graphene (abbreviated as Mo2C/MoN/NG), as an efficient electrocatalyst for the hydrogen evolution reaction (HER), was synthesized via simple ion-exchange resin synthesis followed by a two-step annealing process, which increased the dispersion degree of the electrocatalyst's active sites on the support skeleton and simplified the synthetic conditions. Additionally, N-doped graphene (NG) enhanced the electron transfer and reduced the inner resistance. The material has a graphene-like morphology and highly dispersed Mo2C/MoN nanoparticles about 2 nm in diameter on the NG. X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy revealed that Mo2C/MoN/NG consisted of Mo2C and MoN composited together. Finally, Mo2C/MoN/NG exhibited remarkable performance as an electrocatalyst for the HER with a small overpotential of 78.82 mV and a small Tafel slope of 39.3 mV·dec-1 in a 0.5 mol·L-1 H2SO4 solution. Its activity was approximately 30% lower than that of 20% Pt/C and 60% higher than that of NG. Also, it exhibited a low onset overpotential of 24.82 mV, which is similar to the theoretical HER potential. Our work provides a foundation for advanced HER applications of molybdenum compounds.

Keywords: electrocatalyst, hydrogen evolution reaction, polymolybdate, ion exchange, Tafel slope

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Publication history
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Acknowledgements

Publication history

Received: 05 January 2018
Revised: 22 February 2018
Accepted: 25 February 2018
Published: 16 March 2018
Issue date: September 2018

Copyright

© Tsinghua University Press and Springer‐Verlag GmbH Germany, part of Springer Nature 2018

Acknowledgements

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 21373044), the Fundamental Research Funds for the Central Universities (No. 2412017FZ012), the Natural Science Foundation of Jilin Province (No. 20180101298JC), the Science and Technology Research Foundation of the Thirteenth Five Years of Jilin Educational Committee, the Technology Foundation for Selected Overseas Chinese Scholars of Personnel Ministry of China, Science and Technology Activities Project Preferential Funding for Selected Overseas Chinese Scholars of Jilin Province Human Resources and Social Bureau, and the Analysis and Testing Foundation of Northeast Normal University.

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