Abstract：
Exsolution of metal nanoparticles (NPs) on perovskite oxides has been demonstrated as a reliable strategy for producing catalyst-support systems. Conventional exsolution requires high temperatures for long periods of time, limiting the selection of support materials. Plasma direct exsolution is reported at room temperature and atmospheric pressure of Ni NPs from a model A-site deficient perovskite oxide (La0.43Ca0.37Ni0.06Ti0.94O2.955). Plasma exsolution is carried out within minutes (up to 15 min) using a dielectric barrier discharge configuration both with He-only gas as well as with He/H2 gas mixtures, yielding small NPs (<30 nm diameter). To prove the practical utility of exsolved NPs, various experiments aimed at assessing their catalytic performance for methanation from synthesis gas, CO, and CH4 oxidation are carried out. Low-temperature and atmospheric pressure plasma exsolution are successfully demonstrated and suggest that this approach could contribute to the practical deployment of exsolution-based stable catalyst systems.
摘要：
金属纳米颗粒（NP）在钙钛矿氧化物上的溶出已被证明是生产催化剂-载体系统的可靠策略。传统的解决方案需要长时间的高温，限制支撑材料的选择。据报道，在室温和大气压下，NiNPs的等离子体直接溶解来自模型A位缺陷钙钛矿氧化物（La0.43Ca0.37Ni0.06Ti0.94O2.955）。使用仅He气体以及He/H2气体混合物的介质阻挡放电配置，在几分钟内（最多15分钟）内进行等离子体释放。产生小NP（<30nm直径）。为了证明解出NP的实用性，旨在评估其从合成气中甲烷化的催化性能的各种实验，CO,和CH4氧化进行。成功证明了低温和大气压等离子体溶液，并表明这种方法可能有助于基于溶液的稳定催化剂系统的实际部署。
