Details

Autor(en) / Beteiligte

• Meng, Xiangzhan
• Li, Zengxi
• Zhang, Yongqiang
• Yan, Ruiyi
• Wang, Hui

Titel

Deactivation behavior and aggregation mechanism of supported Au nanoparticles in the oxidation of monoethanolamine to glycine

Ist Teil von

• Catalysis communications, 2020-11, Vol.146, p.106127, Article 106127

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2020

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Deactivation behaviors of gold catalysts in the liquid-phase oxidation of monoethanolamine to glycine were revealed. Properties of the catalysts including Au loading, the valence distribution, and particle size of Au nanoparticles before and after batch reactions were investigated by BET, ICP, XRD, XPS, and TEM. It was found that the main reason for the catalytic deactivation was aggregation of Au nanoparticles. The Au aggregation mechanism of oxidative dissolution-reductive deposition in the reaction was proposed and this mechanism could help to understand the common aggregation of Au nanoparticles in the liquid-phase oxidation of alcohols. [Display omitted] •Deactivation of Au catalysts in the oxidation of monoethanolamine was revealed.•The main reason for deactivation was aggregation of Au nanoparticles.•Aggregation mechanism of oxidative dissolution-reductive deposition was proposed.