Affiliation:
1. State Key Laboratory of Subtropical Silviculture Zhejiang A&F University Hangzhou 311300 P. R. China
2. School of Environment and Resources Zhejiang A&F University Hangzhou 311300 P. R. China
3. School of Science RMIT University Melbourne VIC 3000 Australia
Abstract
AbstractMXenes have recently emerged as a new class of electrocatalysts for diverse energy conversion reactions, but they are generally considered to be catalytically inert. Herein, a strategy of interfacial polarization is put forward to improve the catalytic activity of MXenes, with the construction of an interfacial structure consisting of black phosphorus (BP) nanoflakes and Nb2C MXene nanosheets for electrochemical nitrate reduction to ammonia as a proof of concept. The experimental and computational results reveal that a strong interfacial polarization is built between BP nanoflakes and Nb2C nanosheets in the prepared BP/Nb2C composite. The polarization of Nb centers by adjacent BP sites gives rise to the formation of positively centered Nb atoms and BP‐polarized Nb atoms, which synergistically catalyze the cleavage of N–O bonds in HNO2* to form NO*. In addition, the stabilization of monatomic *N by the BP/Nb2C composite is also enhanced compared with BP nanoflakes and Nb2C nanosheets. As a result, both the ammonia yield rate and Faraday efficiency of the BP/Nb2C composite are much higher than that of BP nanoflakes and Nb2C nanosheets. Overall, this work shows the great potential for constructing a strong interfacial polarization to improve the catalytic performance of MXenes‐based electrocatalysts.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Overseas Expertise Introduction Project for Discipline Innovation
Australian Research Council
Australian Government
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment
Cited by
4 articles.
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