AI Article Synopsis
- The electrochemical reduction of nitrogen (N) into ammonia (NH) faces challenges due to nitrogen's chemical inertness and competing hydrogen reactions.
- Researchers developed a method to connect ruthenium (Ru) nanocrystals that form intraparticle grain boundaries and stacking faults, improving the N reduction.
- The new Ru nanoparticles achieved a yield rate of 29.3 μg cm h for NH production with 7.0% faradaic efficiency, attributed to their decreased work function and enhanced electron transfer from defects created during the connection process.
Article Abstract
The electrochemical reduction of N into NH under ambient conditions is an attractive topic in the chemical industry, but the chemical inertness of N and the competing hydrogen evolution reaction hamper the activity and selectivity of this reaction. Herein, we connected Ru nanocrystals through a facile annealing process, which constructed intraparticle grain boundaries and stacking faults in the connection regions to enhance the N reduction reaction. The connected Ru nanoparticles exhibited an enhanced yield rate and faradaic efficiency for NH production. At -0.1 V RHE, the connected Ru nanoparticles exhibited a maximum yield rate of 29.3 μg cm h (148.0 μg mg h) for NH production with a faradaic efficiency of 7.0%. Mechanistic study revealed that the promotion of the electrochemical reduction of N over connected Ru nanoparticles could be attributed to the decreased work function and facilitated electron transfer, which originated from the abundant defects in the connection region.
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| http://dx.doi.org/10.1039/d2cp00340f | DOI Listing |
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