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Issue 5, 2021
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Ni nanoparticles/V4C3Tx MXene heterostructures for electrocatalytic nitrogen fixation

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Abstract

Electrocatalytic nitrogen reduction reaction (NRR) to generate ammonium is a promising renewable technology for nitrogen cycling. Engineering the composition and surface states of an electrocatalyst is critical to improve the intrinsic NRR performance. Here, a facile preparation of Ni nanoparticles (NPs) loaded on V4C3Tx MXene (denoted as Ni@MX) as a highly efficient NRR electrocatalyst is reported. Remarkably, the Ni@MX nanocomposite presents an ammonia yield rate of 21.29 μg h−1 mgcat−1 at 0.2 mA cm−2. The presented NRR activity is considerably higher than that of the recently reported MXene derivatives and is even comparable to that of the noble-metal-based electrocatalysts. Combined with various characterization methods and the density functional theory (DFT) simulation, we propose that the improved NRR activity was ascribed to a synergistic NRR route by Ni sites in the nanoparticles and the surface O vacancy of V4C3Tx MXene. Given the remarkable improvement of NRR activity on the MXene-based nanocomposites, this work demonstrates the critical role of MXene and its derivatives with surface modification as electrocatalysts.

Graphical abstract: Ni nanoparticles/V4C3Tx MXene heterostructures for electrocatalytic nitrogen fixation

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Supplementary files

Article information


Submitted
03 Nov 2020
Accepted
08 Jan 2021
First published
14 Jan 2021

Mater. Chem. Front., 2021,5, 2338-2346
Article type
Research Article

Ni nanoparticles/V4C3Tx MXene heterostructures for electrocatalytic nitrogen fixation

C. Du, L. Yang, K. Tang, W. Fang, X. Zhao, Q. Liang, X. Liu, H. Yu, W. Qi and Q. Yan, Mater. Chem. Front., 2021, 5, 2338
DOI: 10.1039/D0QM00898B

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