介电屏障等离子体放电 纳米粒子在室温和大气压下溶解
Atta Ul Haq1, Fiorenza Fanelli2,3, Leonidas Bekris4
1School of Engineering, Ulster University, Belfast, BT37 0QB, UK.
概括
等离子体溶解使矿氧化物上低温,快速的纳米粒子生成成为可能. 这种方法可以产生稳定的催化剂支持系统,用于诸如甲化和氧化反应等应用.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术纳米技术
背景情况:
- 在矿氧化物上金属纳米粒子 (NP) 的脱离是先进的催化剂支持系统的关键策略.
- 传统的溶解方法需要高温和长时间,限制材料选择和能源效率.
研究的目的:
- 引入和展示等离子体直接溶解作为NP生成的新低温方法.
- 使用等离子技术研究 (Ni) NPs在氧化物支上的快速形成.
主要方法:
- 使用介电屏障放电配置在室温和大气压下进行等离子体溶解.
- 采用了一种模型矿氧化物 (La0.43Ca0.37Ni0.06Ti0.94O2.955) 与He-only和He/H2气体混合物.
- 描述了被溶解的Ni NPs,其直径通常在30nm以下.
主要成果:
- 通过使用等离子体治疗,成功地在几分钟内 (长达15分钟) 实现了Ni NP溶解.
- 在甲化和CO/CH4氧化反应中证明了溶解的NP的催化性能.
- 证实了小而分散的纳米粒子的形成.
结论:
- 等离子体直接溶解是一种可行的,快速的,低温的替代传统溶解技术.
- 这种方法促进了用于实际应用的稳定催化剂支持系统的开发.
- 该方法有望为基于溶解的催化剂的更广泛采用提供希望.
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