Spadoni Francesco, Perina Sofia, Castellani Gaia, Tosi Paolo, Fornasiero Paolo, Sglavo Vincenzo M, Martini Luca Matteo
Department of Physics, University of Trento, Via Sommarive 14, 38123, Trento, Italy.
Department of Chemical and Pharmaceutical Sciences, Centre for Energy, Environment and Transport Giacomo Ciamician, Consortium INSTM, Trieste Research Unit and ICCOM-CNR Trieste Research Unit, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy.
ChemSusChem. 2025 Jul 1;18(13):e202402778. doi: 10.1002/cssc.202402778. Epub 2025 May 5.
Plasma catalysis combines the high-energy chemistry of plasma with the speed and selectivity of chemical reactions in catalysis. However, unlike well-established thermal catalysis, a better understanding of fundamental mechanisms is needed, as evidenced by the contrasting results reported in the literature. One main challenge is that not only the genuine catalytic effect may play a role, but both the support and the catalyst also impact the plasma, complicating the understanding. In this study, exploring the impact of support by comparing a single metal on various substrates made of the same material is focused on. Herein, silver on γ-alumina is used to investigate ammonia synthesis in N/H plasma discharges. Beyond confirming the beneficial role of silver in ammonia formation, it is also found that the influence of support is crucial and it is affected by the preparation method. These findings contribute to clarifying the discrepancies in the literature results despite using the same materials.
等离子体催化将等离子体的高能化学与催化反应的速度和选择性结合起来。然而，与成熟的热催化不同，由于文献报道的结果相互矛盾，需要更好地理解其基本机制。一个主要挑战是，不仅真正的催化作用可能起作用，而且载体和催化剂都会影响等离子体，这使得理解变得复杂。在本研究中，重点是通过比较单一金属在由相同材料制成的各种基底上的情况来探索载体的影响。在此，使用γ-氧化铝上的银来研究N/H等离子体放电中的氨合成。除了证实银在氨形成中的有益作用外，还发现载体的影响至关重要，并且它受制备方法的影响。尽管使用相同的材料，但这些发现有助于澄清文献结果中的差异。
