纳米集群化无形纳米薄膜用于高度选择性的酸盐到氨的电还原
Minghang Jiang1, Mengfei Zhu2, Junjie Ding3
1Department of Chemistry, School of Science, Xihua University, Chengdu, Sichuan 610039, China; State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, Tianchang New Materials and Energy Technology Research Center, Research Institute of Green Chemistry and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China.
碳纤维上的无形纳米膜是中性介质中降解反应 (NITRR) 的高效电催化剂. 这种新型催化剂在氨生产中达到91.15%的法拉代克效率,性能优于传统的材料.
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:
- 为酸盐还原反应 (NITRR) 开发高效的电催化剂仍然是一个重大挑战.
- 无形和低晶度金属纳米结构具有独特的催化性能.
- 为中性介质优化电催化剂对于实际应用至关重要.
研究的目的:
- 为NITRR合成和评估碳纤维上的无形/低晶度金属纳米膜.
- 确定最佳的催化剂组成和结构,以有效地减少酸盐.
- 阐明反应机制,了解无形结构在催化中的作用.
主要方法:
- 在碳纤维上合成14种不同的金属纳米膜的快速热蒸发.
- 电化学表征以评估催化性能,包括法拉第效率 (FENH3).
- 在现场的里埃变换红外光谱 (FTIR) 和密度函数理论 (DFT) 计算来研究反应中间体和机制.
主要成果:
- 无形纳米薄膜 (Co-NFs/CP) 显示出优异的NITRR性能,FENH391.15%在-0.9V与RHE.
- 协同NFs/CP催化剂的性能明显优于商业薄膜 (39%) 和粉 (20%).
- DFT的计算显示,低坐标的原子和无形结构增强了酸盐中间吸附,并降低了速率决定阶段的能量屏障.
结论:
- 碳纤维上的无形纳米膜代表了中性介质中NITRR的高效电催化剂.
- 该研究强调了无形/低晶度结构在电催化应用中的优点.
- 这项工作为设计各种反应的先进电催化剂提供了新的策略.
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