支持三维碳网络的黑色-异质连接:一种高效的电催化剂,用于高速氧化进化
Di Han1, Gaohui Du2, Yunting Wang1
1Materials Institute of Atomic and Molecular Science, Shaanxi University of Science and Technology, Xi'an 710021, China.
Journal of colloid and interface science
|August 7, 2023
概括
这项研究通过创建BP-Co异构连接来增强黑 (BP) 在电催化中的稳定性. 这种新材料显示出更好的氧化演化反应 (OER) 性能和耐用性.
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:
- 黑 (BP) 是一种具有有前途的电催化性能的二维材料.
- 然而,BP在氧气/水环境中的不良稳定性限制了其应用.
- 开发稳定的基于BP的电催化剂至关重要.
研究的目的:
- 在CNT@NC的支持下合成和描述BP-Co异质连接,用于增强电催化.
- 调查BP-Co Schottky结对BP稳定性和电子性能的影响.
- 为了评估新型催化剂的氧化演化反应 (OER) 性能.
主要方法:
- 合成BP-Co/CNT@NC通过热解ZnCo-化石化伊米达酸框架和溶热处理.
- 材料结构和电子性能的表征.
- 密度函数理论 (DFT) 计算分析界面电子转移和带结构.
- 对OER性能进行电催化测试,包括超电位,Tafel斜率和长期稳定性.
主要成果:
- 在BP-Co Schottky交叉路口显著改善了BP的稳定性和导电性.
- DFT的计算证实了电子再分配和BP-Co接口的一个强大的内置场.
- 优化的BP-Co/CNT@NC催化剂表现出优异的OER性能,具有较低的超电位 (370 mV在100 mA/cm2) 和40 mV/dec的Tafel斜率.
- 在高电流密度 (100-400 mA/cm2) 下观察到优异的OER性能.
结论:
- 开发的BP-Co/CNT@NC异质连接有效地提高了黑的稳定性和电催化活性.
- 这一战略为在苛刻的电催化应用中利用基于BP的材料提供了一条途径.
- 改进的OER性能突显了Schottky连接在催化剂设计中的潜力.
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