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A Comprehensive Understanding of the Melting Temperature of Nanocrystals: Implications for Catalysis
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-01-17 , DOI: 10.1021/acsanm.9b02365 Tiedan Chen 1 , Yanli Ma 1 , Xianliang Fu 1 , Ming Li 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-01-17 , DOI: 10.1021/acsanm.9b02365 Tiedan Chen 1 , Yanli Ma 1 , Xianliang Fu 1 , Ming Li 1
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The melting temperature of nanocrystals, an important property determining the thermal stability and catalytic activity of nanocatalysts, can be tailored by manipulating the size, dimensionality, interface, and composition. Although many studies have been performed on this topic, a comprehensive understanding of the melting temperature of nanocrystals remains deficient. To clarify the synergistic influences of the aforementioned parameters, a thermodynamic model is established from the perspective of the Gibbs free energy along with the size-dependent interface energy. The established model, containing no adjustable parameters, is valid for determining the melting temperature of nanocrystals (single-component nanocrystals or binary nanoalloys) of different sizes, dimensionalities, interface conditions, and compositions. Subsequently, the model calculations are compared with the corresponding experimental and simulation values. The observed consistency between the former and the latter confirms the validity and universality of the established model, which provides an opportunity to better understand the melting behaviors of nanocrystals.
中文翻译：
对纳米晶体熔化温度的全面理解：催化的意义。
纳米晶体的熔化温度是决定纳米催化剂的热稳定性和催化活性的重要特性，可以通过控制尺寸，尺寸，界面和组成来调整。尽管已经对该主题进行了许多研究，但是仍然缺乏对纳米晶体的熔化温度的全面理解。为了阐明上述参数的协同影响，从吉布斯自由能以及尺寸依赖的界面能的角度建立了一个热力学模型。建立的模型，不包含可调整的参数，对于确定不同尺寸，尺寸，界面条件和组成的纳米晶体（单组分纳米晶体或二元纳米合金）的熔化温度有效。后来，将模型计算与相应的实验和仿真值进行比较。前者和后者之间观察到的一致性证实了所建立模型的有效性和普遍性，这为更好地了解纳米晶体的熔融行为提供了机会。
更新日期：2020-01-17
中文翻译：
对纳米晶体熔化温度的全面理解：催化的意义。
纳米晶体的熔化温度是决定纳米催化剂的热稳定性和催化活性的重要特性，可以通过控制尺寸，尺寸，界面和组成来调整。尽管已经对该主题进行了许多研究，但是仍然缺乏对纳米晶体的熔化温度的全面理解。为了阐明上述参数的协同影响，从吉布斯自由能以及尺寸依赖的界面能的角度建立了一个热力学模型。建立的模型，不包含可调整的参数，对于确定不同尺寸，尺寸，界面条件和组成的纳米晶体（单组分纳米晶体或二元纳米合金）的熔化温度有效。后来，将模型计算与相应的实验和仿真值进行比较。前者和后者之间观察到的一致性证实了所建立模型的有效性和普遍性，这为更好地了解纳米晶体的熔融行为提供了机会。
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