氧化核心外催化剂用于乙醇的高效电氧化
Wenxin Du1, Guangxing Yang, Emily Wong
1Department of Chemical Engineering, University of New Hampshire , Durham, New Hampshire 03824, United States.
Journal of the American Chemical Society
|July 18, 2014
概括
-锡纳米颗粒显示了增强的乙醇氧化,破坏了与CO2的C-C键. 与纯相比,核心Pt-SnO2催化剂显著增加了二氧化碳的产生.
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:
- -锡 (Pt/Sn) 双纳米粒子是已知的乙醇氧化反应 (EOR) 的电催化剂.
- 然而,它们分解乙醇的C-C键,这是完全氧化到二氧化碳的关键步骤的能力是有限的.
- 了解结构属性关系对于改善催化剂性能至关重要.
研究的目的:
- 调查用于EOR的Pt/Sn催化剂的详细结构特性.
- 评估不同Pt/Sn催化剂结构的现场二氧化碳生成能力.
- 为了确定在乙醇氧化过程中增强C-C键断裂的Pt/Sn化合物.
主要方法:
- 使用二氧化碳微电极进行现场二氧化碳生成测量.
- 描述Pt/Sn催化剂的组成和晶体结构.
- 对各种Pt/Sn催化剂的乙醇氧化性能进行比较分析.
主要成果:
- 锡元素的组成和晶体结构在EOR期间显著影响二氧化碳的产生.
- 与纯Pt和金属间Pt/Sn.相比,非合金Pt46-(SnO2) 54核心外纳米颗粒表现出优越的C-C键破解能力.
- 这些核心外颗粒产生了4.1倍高的CO2峰值部分压力从EOR比商业Pt/C催化剂.
结论:
- Pt/Sn催化剂结构,特别是锡的形式,对于有效的乙醇氧化到CO2至关重要.
- 核心Pt-SnO2纳米颗粒代表了一个有前途的催化剂设计,用于增强EOR中的C-C键裂解.
- 对定制的Pt/Sn纳米结构的进一步研究可以导致更有效的电催化剂,用于完全氧化乙醇.
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