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通过削弱Mo-H键强度,将Ce促进器设计成一个三维多孔的Mo2C@NC异构结构,用于通过减弱Mo-H键强度进行进化电催化

Xiao-Bing Wang¹, Xue-Zhi Song¹, Xiao-Feng Wang²

¹School of Chemical Engineering, Ocean and Life Sciences, Dalian University of Technology, 2 Dagong Road, Liaodongwan New District, Panjin 124221, China.

Inorganic chemistry

|August 27, 2024

概括

为化演化反应 (HER) 开发高效的电催化剂对于水的分裂至关重要. 这项研究设计了一种新的CeOCl-CeO2/Mo2C异构结构,通过优化Mo-H结合来增强HER活性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

高效的电催化剂对于化演化反应 (HER) 在水分裂中至关重要.
基于Mo2C的材料面临着诸如聚合和强大的MoH结合等挑战,阻碍了它们的性能.

研究的目的:

设计和合成一种新的CeOCl-CeO2/Mo2C异构结构,以改善 HER 催化.
通过形态学和异质接口工程来解决Mo2C聚合和MoH结合的问题.

主要方法:

制造一个3D多孔的基合碳矩阵,嵌入CeOCl-CeO2/Mo2C异构结构.
对HER进行电催化性能测试,包括超电位和Tafel斜率测量.
密度函数计算以研究电子结构和Mo-H结合相互作用.

主要成果:

最佳的CeOCl-CeO2(0.2) /Mo2C@3DNC催化剂表现出极好的HER活性.
在10 mA cm-2时达到156 mV的低超电位,Tafel斜率为62.20 mV dec-1.
CeOCl-CeO2促进剂诱导了电场和电子再分配,削弱了Mo-H合.

结论:

设计的CeOCl-CeO2/Mo2C异构接口有效调节中介吸附,以实现高级HER催化.
这种结合基于Ce的促进器的战略为设计用于能源转换的先进电催化剂提供了一个有希望的途径.

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