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在NiSe/FeO_x异构接口上进行红素辅助电子调制,以促进电催化氧演化反应的发生

Xiaowen Zhong¹, Jianglin Liu¹, Bowen Liu¹

¹Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.

International journal of biological macromolecules

|July 3, 2024

概括

一种由素衍生的新型碳封装催化剂 (NiSe-FeOx@LC) 显示出氧化演化反应 (OER) 的出色性能,这是水分裂的关键步骤. 这种持久的催化剂为清洁能源应用提供了一个有希望的,具有成本效益的替代方案.

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:

氧进化反应 (OER) 对于水的分裂至关重要,但在动力学上受到阻碍.
开发高效和稳定的非贵金属催化剂对于成本效益高的生产至关重要.
现有的催化剂往往由于耐用性差和活性低而受到损害.

研究的目的:

为了合成和描述一种新的NiSe-FeOx异质连接,封装在素衍生的碳中 (NiSe-FeOx@LC).
为了评估 NiSe-FeOx@LC 的氧化演化反应 (OER) 的电催化性能.
阐明开放式资源活动和稳定性增强背后的机制.

主要方法:

用于催化剂合成的水热自组装和现场热解.
电化学测试 (超电位,Tafel斜率,长期稳定性) 来评估OER性能.
密度函数理论 (DFT) 计算以了解电子结构和反应机制.

主要成果:

NiSe-FeOx@LC表现出优异的OER活动,具有较低的超电位 (265 mV在50 mA·cm−2) 和出色的Tafel斜率 (83 mV·dec−1).
催化剂表现出了显著的长期稳定性,这表明它对浸出和聚合的抗性.
DFT的计算证实,FeOx兴奋剂优化了NiSe-FeOx接口,增强了d带轨道杂交并促进了电子转移.

结论:

素衍生的碳封装有效地保护了活性NiSe-FeOx成分,确保了催化剂的耐用性.
在碳矩阵内,NiSe和FeOx之间的协同相互作用显著提高了OER性能.
这项工作突出了由素衍生的碳封装金属催化剂对于高效的电催化水分解的潜力.

关键词:

生物炭是一种生物炭.异面接口异面接口在Lignin的基础上.氧的演化反应反应的反应.

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