在纳米立方PtCo催化剂上提高甘油电氧化性能
Irina Terekhina1, Mats Johnsson1
1Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm SE-106 91, Sweden.
ACS applied materials & interfaces
|October 14, 2024
概括
贵金属催化剂,特别是-纳米颗粒,显示高选择性通过电氧化转化糖醇到有价值的C3产品. 优化的Pt60Co40催化剂在性介质中表现出卓越的性能.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 绿色化学 绿色化学
背景情况:
- 甘油 (GLY) 是一种廉价的平台分子和生物柴油副产品.
- 糖醇电氧化 (GEOR) 是一个有前途的转化方法.
- 贵金属催化剂,如 (Pt),是稳定的,对C3产品有选择性的.
研究的目的:
- 为GEOR研究立方Pt-Co纳米粒子.
- 优化催化剂组成和反应条件.
- 提高对乳酸盐和糖酸盐等C3产品的选择性.
主要方法:
- 合成的立方Pt-Co纳米颗粒 (Pt100Co0,Pt80Co20,Pt60Co40) 已经得到使用.
- 在性介质中的评估催化剂在20°C和40°C.
- 分析了不同电位 (0.67V和0.87V与RHE) 的产品选择性和反应机制.
主要成果:
- Pt60Co40表现出优越的整体性能 (活性,转化,选择性).
- 所有催化剂在0.67V与RHE相比,都实现了高C3产品选择性 (高达95%).
- 乳酸盐形成在0.67V/40°C (72%的选择性) 受到青;糖酸盐和C-C裂变在0.87V时受到青.
结论:
- 调整 Pt-Co 组成和反应条件显著影响 GEOR 的选择性.
- Pt-Co合金是从甘油中生产C3化学物质的有效催化剂.
- 优化的催化剂为提升甘油的价值提供了一条可持续的途径.
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