模仿酶的三维几何结构的电催化纳米粒子:纳米酶
Tania M Benedetti1, Corina Andronescu2, Soshan Cheong3
1School of Chemistry and Australian Centre for NanoMedicine , University of New South Wales , Sydney 2052 , Australia.
Journal of the American Chemical Society
|September 25, 2018
概括
我们开发了纳米酶, 纳米颗粒与刻画的通道, 模仿酶改善电催化. 这些纳米酶由于纳米封闭的反应体积显著增强了氧降解反应活性.
科学领域:
- 材料科学
- 电化学
- 纳米技术
背景情况:
- 酶具有深入嵌入的活性位点,为高催化周转创造纳米封闭体积.
- 电催化通常需要高效的反应环境来增强活性.
研究的目的:
- 提出并研究具有蚀刻基质通道的纳米粒子,称为纳米酶,作为电催化剂的简化酶模拟物.
- 增强氧降解反应 (ORR) 的电催化活性.
主要方法:
- 制造- (PtNi) 纳米粒子与蚀刻的基板通道.
- 使用oleylamine封闭层阻外部纳米粒子表面.
- 氧降解反应 (ORR) 的电催化评估.
主要成果:
- 具有隔离基质通道的PtNi纳米酶表现出增强的ORR活性.
- 道内的纳米封闭反应体积促进了ORR,与散装电解质条件不同.
- 与未蚀刻的纳米粒子相比,电化学活性表面积正常化的活性增加了3.3倍,与中孔纳米粒子相比,增加了2.1倍.
结论:
- 带有蚀刻通道的纳米酶提供了一种模仿电催化酶活性位点的有希望的策略.
- 嵌入道中的纳米环境显著提高了电催化性能.
- 这种方法为设计高效的电催化剂提供了新的途径.
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