Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 869, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159335
Keywords
Electrocatalysis; Nitrogen fixation; 2D MXene; Co-doping; Synergistic performance; Energy storage
Categories
Funding
- National Natural Science Foundation of China [21603157]
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
- Sichuan Science and Technology Program [2020YJ0086]
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The co-doping strategy was employed to design the electronic configuration and structural mechanic of Ti3C2Tx catalysts for efficient NRR, leading to improved electron/ion transport capacity and increased catalytic active sites. The NS-Ti3C2Tx nanosheets showed excellent electrocatalytic stability with high NH3 yield and Faraday efficiency, demonstrating promising potential for energy storage applications.
High-polluting industrial ammonia synthesis runs counter to the intentions of a low-carbon society. In contrast, the electrocatalytic nitrogen reduction reaction (NRR) is expected to provide fascinating and broad prospects for green ammonia synthesis, which urgently requires efficient and low-cost catalysts. Although it has been proven that two-dimensional (2D) transition metal carbides and carbonitrides (MXenes) have great potential for NRR, there is still need to further improve their activity. In this work, a co-doping strategy was employed to design the electronic configuration and structural mechanic of Ti3C2Tx catalysts for efficient NRR. As expected, the synergistic effect of N and S dopants in Ti3C2Tx (NS-Ti3C2Tx) significantly improves the electron/ion transport capacity and increases the catalytic active sites. Specifically, the as-prepared NS-Ti3C2Tx nanosheets demonstrated an excellent electrocatalytic stability with NH3 yield of 34.23 mu g h(-1) mg(cat)(-1) at -0.55 V vs. RHE, and a Faraday efficiency of 6.6% in 0.05 M H2SO4. Therefore, this work opens up a new research approach for preparing high-performance catalysts for energy storage applications through efficient nitrogen fixation technology. (C) 2021 Elsevier B.V. All rights reserved.
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