单原子催化剂具有异常的活性和稳定性,用于合成二甲基碳酸盐
Xiang-Bin Shao1, Hao-Cheng Xu1, Zhi-Wei Xing2
1State Key Laboratory of Materials-Oriented Chemical Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), College of Chemical Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.
Journal of colloid and interface science
|March 26, 2025
概括
研究人员在N-化碳上开发了新的单原子催化剂,以实现高效和稳定的转化,产生二甲基碳酸盐. 这一进步为化学反应中的传统固体基提供了一个可持续的替代方案.
科学领域:
- 不同质的催化剂.
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- 固基催化剂提供了诸如低腐蚀和环境可持续性等优势.
- 目前固体基础的局限性包括中度活动和不稳定性,阻碍了更广泛的应用.
- 烯酸伊米达酸框架 (ZIF-8) 衍生N-化碳 (NPC) 是一个有前途的支持材料.
研究的目的:
- 设计和制造增强型固基催化剂,以提高活性和稳定性.
- 为了研究ZIF-8衍生NPC支持的 (Ca) 单原子催化剂,用于转化.
- 探索Ca-N4图案作为生产二甲基碳酸盐 (DMC) 的活性中心的潜力.
主要方法:
- 在使用ZIF-8衍生材料的N-化碳 (Ca1/NPC) 上制造单原子固体基.
- 使用Ca-N4图案作为活性催化中心.
- 测试催化剂在甲醇和乙烯碳酸盐的转化过程中的性能,以产生DMC.
主要成果:
- 在DMC生产中,Ca1/NPC催化剂表现出高活性 (35.1%) 和稳定性 (5个周期没有失活).
- 性能明显超过传统的CaO/NPC和其他报告的/土金属基催化剂.
- 实现了123.0h-1的高周转频率 (TOF),超过了传统和超基础催化剂的性能.
结论:
- 支持N-化碳的单原子催化剂在转 Ester 化方面表现出优越的催化性能.
- 已确定Ca-N4基因为一个高效的活性位点,可增强催化活性和稳定性.
- 这项研究为开发各种异质反应的先进单原子固体基催化剂提供了新的途径.
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