Borophene Nanosheets as High-Efficiency Catalysts for the Hydrogen Evolution Reaction
Guoan Tai1, Maoping Xu1,2, Chuang Hou1
1The State Key Laboratory of Mechanics and Control of Mechanical Structures, Laboratory of Intelligent Nano Materials and Devices of Ministry of Education, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
ACS Applied Materials & Interfaces
|December 17, 2021
Summary
Researchers synthesized borophene nanosheets for catalysis. This novel material demonstrates excellent electrocatalytic hydrogen evolution reaction (HER) performance, paving the way for advanced energy applications.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Borophene is theoretically predicted to exhibit exceptional catalytic properties due to its electron deficiency and numerous active sites.
- Experimental validation of borophene's catalytic potential, particularly for high-efficiency applications, has been lacking.
Purpose of the Study:
- To experimentally synthesize borophene nanosheets.
- To evaluate the electrocatalytic performance of borophene for the hydrogen evolution reaction (HER).
- To elucidate the mechanisms behind borophene's enhanced catalytic activity.
Main Methods:
- Chemical vapor deposition (CVD) using sodium borohydride as the boron source and hydrogen gas as the carrier gas.
- Fabrication of borophene nanosheets on a carbon cloth substrate.
- Electrochemical characterization, including Tafel slope analysis and cycling stability tests in sulfuric acid.
- First-principles calculations to investigate electronic structure and active sites.
Main Results:
- Successfully synthesized borophene nanosheets with a crystal structure matching theoretical α'-borophene.
- Demonstrated good electrocatalytic hydrogen evolution reaction (HER) activity with a Tafel slope of 69 mV/dec.
- Exhibited excellent cycling stability in a 0.5 M H₂SO₄ solution.
- First-principles calculations confirmed enhanced performance due to inherent metallicity and abundant active sites.
Conclusions:
- Synthesized borophene nanosheets show promising electrocatalytic activity and stability for the hydrogen evolution reaction.
- The material's performance is attributed to its rich surface active sites and low charge transfer resistance.
- Borophene holds significant potential for high-efficiency energy applications, including catalysis and batteries.
Keywords:
borophenecarbon clothchemical vapor depositionhydrogen evolution reactiontwo-dimensional materialsMore Related Videos
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