不同原子构建了氧气电催化和可充电的空气电池的共价有机框架
Anup Kumar Pradhan1, Bhushan Kishor Nandre1, Pandiyan Sivasakthi1
1Department of Chemistry, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Jawahar Nagar, Kapra Mandal, Medchal District, Telangana 500078, India. pralokkumar.samanta@hyderabad.bits-pilani.ac.in.
概括
两个无金属的供体-受体COF显示了双功能氧气电催化. 富含N,S的BTTh-TZ-COF提供了卓越的电荷传输和增强的固态ZAB性能.
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
- 纳米技术纳米技术
背景情况:
- 无金属有机材料正在成为电催化剂的可持续替代品.
- 捐赠者-接受者共价有机框架 (COF) 提供可调节的电子特性和高表面积.
- 氧气演变反应 (OER) 和氧气减少反应 (ORR) 的双功能催化剂对于储能和转换装置至关重要.
研究的目的:
- 为了合成和描述两个新的低带隙,无金属的捐赠者-接受器COFs.
- 调查这些COFs的双功能OER/ORR电催化活性.
- 为了评估N,S丰富的COF在固态空气电池 (ZAB) 的性能.
主要方法:
- 通过已知的聚合方法合成捐赠者-接受者COFs.
- 电化学表征包括循环电压测量,线性扫描电压测量和电化学阻抗光谱.
- 使用合成的COF作为催化剂制造和测试固态ZAB设备.
主要成果:
- 两种合成的COF都显示出双功能OER和ORR活动.
- 与其他COF相比,富含N,S的BTTh-TZ-COF表现出优越的电荷传输特性.
- BTTh-TZ-COF显示出更高的活性位点密度和增强的催化性能.
- 使用BTTh-TZ-COF的固态ZAB设备显示了改进的性能指标.
结论:
- 无金属供体-接受体COF是双功能氧反应的可行的电催化剂.
- 富含N,S的BTTh-TZ-COF是高性能固态ZAB的有希望的候选者,因为其增强的电荷传输和活跃站点.
- 这项工作突出了针对先进能源应用量身定制的COF结构的潜力.
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