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构建有孔的和共碳的自组装策略,作为有效的ORR电催化剂,用于空气电池
Yuying Fu1, Cancan Cao1, Wenrui Song1
1College of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, 450001, P.R. China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|March 15, 2024
概括
新的多孔B,N联合化碳催化剂 (BCN-P) 通过使用库库比特[7]uril和closo-[B12H12]2-.合成. 这些催化剂在氧降解反应和空气电池中表现出色,与金相比.
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:
- 用 (N) 和 (B) 杂碳纳米材料可以通过促进电荷极化来增强氧降解反应 (ORR).
- N和B原子之间的协同作用可以改善O2吸附,并削弱O-O键,这对于高效的ORR至关重要.
研究的目的:
- 使用易于自组装的策略,合成新的多孔B,N共碳基催化剂 (BCN-P).
- 研究 BCN-P 对氧降解反应的催化活性及其在空气电池中的应用.
主要方法:
- 采用一种自组装策略,使用甲[7]uril (CB7) 作为源和closo-[B12H12]2-作为源.
- 使用聚烯微球来引入多孔性,增强活性部位的暴露.
- 在性介质中评估了电化学性能,包括开始电位和半波电位.
主要成果:
- 合成的 BCN-P 催化剂在性溶液中表现出高的ORR起始电位 (Eonset = 0.846 V) 和半波电位 (E1/2 = 0.74 V).
- 与 BCN-P 组装的空气电池表现出高工作电压 (1.42 V) 和峰值功率密度 (128.7 mW cm−2).
- BCN-P催化剂显示出稳定的充/放电循环性能,与碳 (Pt/C) 上的商业相美.
结论:
- 通过自组装方法,可以有效地合成多孔B,N联合化碳催化剂 (BCN-P).
- B和N原子的协同合效应,以及多孔结构,显著增强ORR活动.
- BCN-P为空气电池提供了对Pt/C的有希望,高性能和成本效益的替代方案.
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