Autor: |
Chengfeng Du, Xianhu Liu, Kewei Tang, Qinghua Liang, Xiangyuan Zhao, Hong Yu, Weihong Qi, Wei Fang, Lan Yang, Qingyu Yan |
Rok vydání: |
2021 |
Předmět: |
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Zdroj: |
Materials Chemistry Frontiers. 5:2338-2346 |
ISSN: |
2052-1537 |
DOI: |
10.1039/d0qm00898b |
Popis: |
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. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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