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同中心的2D金属有机框架的高催化活性向双功能的氧气演变和减少反应:由旋转极化效应合理化
Liang Hu1, Feifan Wang1, Yu Jing1
1Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
--氧-4 (CoNO4-) 单层表现出强大的双功能催化活性,用于氧化演化和还原反应 (OER/ORR). 旋转势头被确定为预测2D金属有机框架 (MOF) 中OER/ORR性能的一个关键描述符.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 纳米技术纳米技术
背景情况:
- 具有CoX4 (X = NH,S,O) 图案的金属有机框架 (MOF) 显示出高的催化活性,但原因尚不清楚.
- 了解二维MOF中的结构-属性-性能关系对于设计高效的电催化剂至关重要.
研究的目的:
- 作为模型系统,提出和研究由过渡金属--氧-4 (TMNO4-) 和三三角基 (TOT) 构建的2D MOF.
- 为了澄清二维MOF中的氧演变反应 (OER) 和氧减少反应 (ORR) 的结构-性质-性能关系.
- 为了确定可靠的描述器来预测催化活性.
主要方法:
- 将TMNO4-图案与TOT连接的单层的计算建模.
- 对OER和ORR的催化活动的评估.
- 分析电子结构和与中间物种的相互作用.
- 作为活动描述符的旋转动量的识别.
主要成果:
- CoNO4-单层对OER和ORR都表现出强大的双功能催化活性,优于许多现有的二维MOF和单原子催化剂 (SAC).
- 催化活性与和关键中间体之间的温和相互作用有关,可通过协调原子调节.
- 旋转动量被证实是这些二维MOF中的OER/ORR活动的可靠描述符.
结论:
- 该研究阐明了OER/ORR的2DMOF中的结构-活动关系.
- 旋转动量是合理催化剂设计的一个有价值的描述符.
- 这些发现为开发有效的双功能OER/ORR电催化剂铺平了道路.
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