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由Ni-ZIF-67衍生而来的Ni/Co@NC中低Ru兴奋剂诱导的接口工程,用于增强的电催化整体水分裂

Abdulwahab Salah¹, Hong-Da Ren², Nabilah Al-Ansi³

¹Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia.

ACS applied materials & interfaces

|October 23, 2024

概括

研究人员开发了一种新的三金属催化剂 (Ru/Ni/Co@NC),用于高效的电化学水分解. 这种催化剂显著改善了和氧的进化反应,为清洁能源生产提供了有前途的解决方案.

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:

电化学分水对于生产至关重要,但氧演化反应 (OER) 在动力学上具有挑战性.
高性能电催化剂对于克服OER瓶和提高整体水分裂 (OWS) 效率至关重要.

研究的目的:

为增强演化反应 (HER) 和OER合成和表征三金属异构催化剂 (Ru/Ni/Co@NC).
为了研究新型催化剂的催化性能,用于性介质中的整体水分解.

主要方法:

从Ni-ZIF-67中通过碳化合成Ni/Co@NC.
通过电替换将鲁 (Ru) 纳入中,形成Ru/Ni/Co@NC.
对HER,OER和OWS进行电催化性能测试.
密度函数理论 (DFT) 计算以阐明反应机制.

主要成果:

优化的Ru/Ni/Co@NC催化剂显示出较低的超电位:HER为34mV,OER为174mV,在10mA/cm2时.
实现了较低的Tafel斜率 (33.42 mV/dec对于HER,34.39 mV/dec对于OER),表明有效的动力学.
对于性水分裂,证明了1.44V的低电池电压.
DFT的计算证实了增强的H*吸附和减少的OER能源障碍.

结论:

Ru/Ni/Co@NC三金属异构结构对HER和OER表现出极好的电催化活性.
催化剂设计优化了活性点,电子结构和界面协同作用,以实现高效的水分裂.
由ZIF-67衍生出的催化剂显示出用于能源转换和储存应用的巨大潜力.

关键词:

在 DFT 方面,它是最重要的.在这里,我们可以看到它.这就是Ni-ZIF-67的含量.这是OER OER.卢/尼/科@NC 卢/尼/科@NC 卢/尼/科电催化剂是一种电催化剂.水的分裂是水的分裂.

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