具有高氧降解反应活性的边缘功能化聚氨酸网络
Shaoxuan Yang1,2, Yihuan Yu1,2, Meiling Dou1,2
1State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P.R. China.
Journal of the American Chemical Society
|September 18, 2020
概括
研究人员开发了先进的二维结合芳香网络 (CAN),以实现高效的电催化. 这些新材料在氧降解反应和空气电池中表现出卓越的性能,为催化剂提供了有希望的替代品.
科学领域:
- 材料科学
- 电化学
- 纳米技术
背景情况:
- 双维 (2D) 结合芳香网络 (CAN) 对于能源应用至关重要.
- 开发高效的氧降解反应电催化剂对于清洁能源技术至关重要.
研究的目的:
- 使用球磨技术制造新的二维CAN.
- 评估这些CAN的ORR电催化活性及其在空气电池中的性能.
主要方法:
- 通过聚合物甲前体的球磨制造二维CAN.
- 使用芳香酸无水化物替代剂 (四甲) 的功能化.
- 材料特性 (层厚,表面积,活性点) 和电化学测试.
主要成果:
- 最佳的CAN表现为均的薄层 (2.9 nm),具有高的BET表面积 (92 m2 g-1).
- 获得了明确和高度暴露的Co-N4活性位点.
- 电催化ORR活性为44mA mg-1,超过Pt/ C催化剂的1. 2 - 6. 0倍.
- 采用这些催化剂的气电池实现了高功率密度 (面积为137mW cm−2,质量为0.68W mg−1).
结论:
- 开发的无支和无热解策略为二维材料合成提供了一条新途径.
- 这些二维CAN显示出作为清洁能源转换和储存的高效电催化剂的巨大潜力.
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