Hydrothermal synthesis of core-shell MoO2/α-Mo2C heterojunction as high performance electrocatalyst for hydrogen evolution reaction

Hydrothermal synthesis of core-shell MoO2/α-Mo2C heterojunction as high performance... Article history: Cost-effective electrocatalysts for hydrogen evolution reaction are attractive for energy conversion and Received 18 July 2017 storage processes. Herein, a variety of molybdenum-based catalysts have been synthesized by means of Received in revised form 7 August 2017 a simple hydrothermal method using cyclodextrin as structural guiding agent and carbon source. With Accepted 15 August 2017 optimizing the usage of cyclodextrin, both molybdenum oxidate and -type molybdenum carbide can Available online 19 August 2017 be controllable synthesized in terms of phase composition, morphology and porosity. X-ray diffraction patterns and high resolution transition electronic images show that the as-prepared sample appears a Keywords: core-shell structure of MoO /-Mo C heterojunction. Surprisingly, such heterojunction as an electrocat- 2 2 Core-Shell alyst exhibits a remarkable hydrogen evolution reaction (HER) performance with low overpotential of -Mo C 100 mV in alkaline electrolyte, and of 152 mV in acidic condition at a current density 10 mA/cm , with Heterojunction very low Tafel slope of 50 mV/dec and 65 mV/dec, respectively. This specific activity of presented material Electrocatalyst Hydrogen evolution reaction is found to be superior to those of the most active Mo-based electrocatalysts reported so far. We believe that our finding of cost-effective http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Hydrothermal synthesis of core-shell MoO2/α-Mo2C heterojunction as high performance electrocatalyst for hydrogen evolution reaction

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2017.08.098
Publisher site
See Article on Publisher Site

Abstract

Article history: Cost-effective electrocatalysts for hydrogen evolution reaction are attractive for energy conversion and Received 18 July 2017 storage processes. Herein, a variety of molybdenum-based catalysts have been synthesized by means of Received in revised form 7 August 2017 a simple hydrothermal method using cyclodextrin as structural guiding agent and carbon source. With Accepted 15 August 2017 optimizing the usage of cyclodextrin, both molybdenum oxidate and -type molybdenum carbide can Available online 19 August 2017 be controllable synthesized in terms of phase composition, morphology and porosity. X-ray diffraction patterns and high resolution transition electronic images show that the as-prepared sample appears a Keywords: core-shell structure of MoO /-Mo C heterojunction. Surprisingly, such heterojunction as an electrocat- 2 2 Core-Shell alyst exhibits a remarkable hydrogen evolution reaction (HER) performance with low overpotential of -Mo C 100 mV in alkaline electrolyte, and of 152 mV in acidic condition at a current density 10 mA/cm , with Heterojunction very low Tafel slope of 50 mV/dec and 65 mV/dec, respectively. This specific activity of presented material Electrocatalyst Hydrogen evolution reaction is found to be superior to those of the most active Mo-based electrocatalysts reported so far. We believe that our finding of cost-effective

Journal

Applied Surface ScienceElsevier

Published: Jan 1, 2018

References

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