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将纳米颗粒热原子化为单个原子:工程高性能纳米酶的有效策略

Yuanjun Chen¹, Peixia Wang^2,3, Haigang Hao⁴

¹Department of Chemistry, Tsinghua University, Beijing 100084, China.

Journal of the American Chemical Society

|November 2, 2021

概括

研究人员开发了一种新方法来制造称为纳米酶的高效人工酶. 通过将纳米颗粒原子化为单个原子,它们显著提高了催化性能,为天然酶提供了有希望的替代品.

科学领域:

材料科学
催化剂
纳米技术

背景情况:

人工酶 (纳米酶) 是有前途的,但在催化效率方面落后于自然酶.
纳米粒子 (Pt NPs) 在纳米酶中使用,但它们的性能可能是有限的.

研究的目的:

开发一种创新的高性能纳米酶策略.
增强基纳米酶的催化活性.

主要方法:

通过逆热烧结将纳米粒子 (Pt NPs) 直接原子化.
密度函数理论 (DFT) 计算以了解电子结构和催化机制.

主要成果:

与Pt NPs相比,开发的热稳定的Pt单原子纳米酶 (Pt_TS-SAzyme) 显示出显著增强的过氧化酶类催化活性.
工程P和S原子促进了原子化,并优化了单原子Pt位点的电子结构.
DFT揭示了P,S和N原子在增强催化性能方面的协同作用.

结论:

热原子化是设计高性能单原子纳米酶的有效策略.
这种方法为设计模仿自然酶效率的人工酶提供了新的途径.
对于潜在的应用,Pt_TS-SAzyme具有优越的催化特性.

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