从模型和真实多元组件溶液中与非贵金属结合的Pt,Pd,Rh和Ru纳米颗粒的沉
Martyna Rzelewska-Piekut1, Zuzanna Wolańczyk1, Marek Nowicki2,3
1Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, ul. Berdychowo 4, 60-965 Poznan, Poland.
Molecules (Basel, Switzerland)
|July 14, 2023
概括
贵金属纳米粒子 (Pt,Pd,Rh,Ru) 用各种还原剂合成,非贵金属如Fe和Cu也沉. 这些纳米材料在减少4-尼托醇方面表现出高的催化活性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 催化剂是一种催化剂.
背景情况:
- 贵金属 (Pt,Pd,Rh,Ru) 是有价值的催化剂.
- 金属纳米粒子 (NP) 的高效合成对于催化应用至关重要.
- 从工业废物流中回收贵金属在经济和环境上都很重要.
研究的目的:
- 为了研究从多元组合溶液中金组金属 (PGM) 和非贵金属的沉.
- 评估非贵金属对PGM产量和催化性能的影响.
- 评估合成的基于PGM的纳米催化剂的催化性能.
主要方法:
- 使用降解剂 (NaBH4,酸,酸盐,酸) 和聚烯立稳定剂,降低Pt,Pd,Rh,Ru,Fe和CuNP的沉.
- 使用扫描电子显微镜-能量分散光谱 (SEM-EDS) 和传输电子显微镜 (TEM) 进行纳米粒子形态的表征.
- 通过将4-尼托醇 (NPh) 减少为4-氨基醇 (NAf) 来评估催化活性.
主要成果:
- 化 (NaBH4) 从多组分溶液中有效地沉了Pt,Pd,Rh,Fe和CuNP (>80%的效率).
- 合成的PGM纳米粒子的大小不超过5nm.
- 含有Pt/Pd/FeNP的纳米催化剂,来自水的汽车催化剂,表现出高的催化活性 (86%的NPh在pH11下在30分钟内转化).
结论:
- 在NP合成过程中,非贵金属与PGM共同沉.
- 非贵金属的存在可以影响基于PGM的纳米材料的特性.
- 合成的PGM/非贵金属纳米催化剂显示出化学合成和潜在的贵金属回收应用的前景.
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