溢出能增强酸化为工业活动与ppm级单原子
Nai-Liang Wang1, Tong-Hui Li1, Xin Wang1
1Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Ningxia, 212013, P.R. China.
高贵的单原子催化剂在化中表现出增强的活性. 来自支的溢出大大提高了催化剂的性能和稳定性,提供了一个可行的工业途径.
科学领域:
- 不同质的催化剂.
- 材料科学 是一种材料科学.
- 表面化学 表面化学
背景情况:
- 单原子催化剂 (SAC) 提供高原子效率,但在工业应用中 (如化) 通常存在低活性和时空产量.
- 与传统工业催化剂相比,高贵SAC的微量载荷受到其性能的限制.
- 制定加强SAC活动的战略对于其实际实施至关重要.
研究的目的:
- 为了研究碳涂层支 (Ni@C) 的溢出对单原子催化剂 (Pt SACs) 在酸化中的性能的影响.
- 为了实现与工业化催化剂可比的时空产量.
- 探索溢出在调节催化活性和稳定性的作用.
主要方法:
- 在碳涂材料 (Pt1/Ni@C) 上支持的单原子催化剂的合成.
- 为了评估各种条件下的催化活性和稳定性,进行了亚酸化反应.
- 密度函数理论 (DFT) 的计算被用来阐明溢出的机制及其对化能量屏障的影响.
主要成果:
- Pt1/Ni@C催化剂的转换频率 (TOF) 增加了25.7倍,达到44.1s-1,相当于1重%的Pd/C工业催化剂.
- 催化剂在酸性,基本性和氧化环境中表现出极好的稳定性.
- DFT的计算显示,溢出显著降低了化能障碍,其效果与Pt单个原子上吸附的溢出的密度相关.
结论:
- 来自Ni@C的溢出是一种高度有效的策略,可以促进酸化的SACs的活性和稳定性.
- 吸附溢出的密度可以预测SAC催化化中的协同效应,指导未来的催化剂设计.
- 这种方法为开发高效和与工业相关的SAC提供了一个有希望的途径.
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