核心外ZIF-8@ZIF-67衍生CoP纳米颗粒嵌入N-Doped碳纳米管空心多面体,用于高效的整体水分离
Yuan Pan1,2, Kaian Sun2, Shoujie Liu1,3
1Department of Chemistry, Tsinghua University , Beijing 100084, China.
Journal of the American Chemical Society
|January 18, 2018
概括
研究人员在添加碳纳米管空心多面体 (NCNHP) 中开发了一种新的化物纳米粒子 (CoP NP) 催化剂,以实现高效的整体水分. 这种混合催化剂在和氧进化反应中表现出极高的活性和稳定性.
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 开发高效的非贵金属电催化剂用于整体水分离对于可持续的生产至关重要.
- 现有的催化剂通常具有低活性,不稳定性或高成本.
研究的目的:
- 合成和描述一种用于增强电催化水分裂的新型混合纳米结构.
- 研究化物纳米粒子和化碳纳米管空心多面体之间的协同作用.
主要方法:
- 使用核心外ZIF-8@ZIF-67作为前体,采用了热解-氧化-化策略.
- 由此产生的嵌入在N-doped碳纳米管空心多面体 (NCNHP) 中的CoP纳米粒子 (NP) 得到了特征.
- 评估了整体水分裂的电催化性能,包括活性和长期稳定性.
- 进行密度函数理论 (DFT) 计算以了解催化机制.
主要成果:
- CoP/NCNHP混合体在整体水分解方面表现出卓越的双功能电催化性能.
- 需要1.64V的低电位才能达到10mA·cm-2的电流密度.
- 催化剂在36小时以上的时间内表现出优异的活性和稳定性,且潜在的衰变是可以忽略的.
- 由于从NCNHP转移到CoP,DFT计算显示了增强的电子状态和结合强度.
结论:
- CoP/NCNHP混合纳米结构作为一个高度活跃和稳定的非贵金属电催化剂,用于整体的水分解.
- CoP NPs和NCNHP之间的协同作用,以及增强的电子特性,有助于提高催化性能和稳定性.
- 这项工作为设计用于清洁能源应用的先进电催化剂提供了有前途的策略.
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