可调节的C3产品选择性在立方和树突型Pt纳米催化剂上的甘电氧化
Irina Terekhina1, Mats Johnsson1
1Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm SE-106 91, Sweden. mats.johnsson@mmk.su.se.
Nanoscale
|June 26, 2024
概括
具有立方体和树突形状的纳米粒子有效催化糖电氧化. 立方纳米颗粒显示出优越的活性和选择性,用于生产有价值的三碳产品,如乳酸盐.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 糖醇是生物柴油生产的易于获得,低成本的副产品.
- 将糖回收成增值化学品对于可持续的化学过程至关重要.
- 电催化甘氧化为甘的价值化提供了一个有前途的途径.
研究的目的:
- 为了研究纳米粒子 (Pt) 与立方体 (PtCUBE) 和树突 (PtDEND) 形态作为催化剂糖醇电氧化反应 (GEOR).
- 为了优化电催化性能和对三碳 (C3) 产品 (乳酸盐,糖酸盐,酸盐) 的选择性.
- 研究催化剂形态,电解质组成和应用潜力的对GEOR的影响.
主要方法:
- 合成和PtCUBE和PtDEND纳米粒子的表征.
- 使用循环电压测量和时电压测量对GEOR的电化学评估.
- 使用像HPLC这样的技术分析反应产品.
- 糖醇度,电解质和应用潜力的系统变化.
主要成果:
- 对于C3产品,PtCUBE和PtDEND在0.67V和RHE之间都表现出高选择性 (高达91%).
- 在低度的甘油中,特别是在PtDEND上,C-C键裂变受到青.
- 与PtDEND相比,PtCUBE的质量和特异性活动更高.
- 乳酸是主要的C3产品,在PtCUBE上达到68%的最大选择性.
结论:
- 在GEOR中观察到Pt纳米粒子的形态依赖的电催化活性和选择性.
- PtCUBE纳米颗粒为糖电氧化提供了卓越的性能,对C3产品产生了高选择性.
- 这项研究突出了定制纳米结构的潜力,以高效地提升甘油的价值.
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