用于化学循环氧化脱的双功能Mo-V-O混合氧化物中的调节晶格氧气
Sai Chen1, Liang Zeng1, Rentao Mu1
1Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology , Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China.
Journal of the American Chemical Society
|November 9, 2019
概括
双功能的Mo-V-O混合氧化物通过化学循环氧化脱 (CL-ODH) 实现了选择性转化. 这种方法实现了高选择性和产量,克服了传统脱方法的局限性.
科学领域:
- 催化剂
- 材料科学
- 化学工程
背景情况:
- 在脱过程中,氧化学对选择性C-H键裂变至关重要.
- 传统的氧化脱 (ODH) 往往由于过度氧化而导致低选择性.
- 为选择性功能化开发高效的催化剂仍然是一个重大挑战.
研究的目的:
- 开发一种用于选择性转化的新型催化系统.
- 研究一种替代性的化学循环氧化脱方法 (CL-ODH).
- 了解金属-氧相互作用在增强选择性的作用.
主要方法:
- 合成和描述双功能的Mo-V-O混合氧化物.
- 在500°C的脱过程中对催化性能进行评估.
- 研究涉及晶格氧和原子级兴奋剂的反应机制.
- 在100个脱-再生周期中分析催化剂稳定性.
主要成果:
- 使用Mo-V-O催化剂在36%的转化时达到89%的选择性.
- 在100个周期中证明了高催化剂稳定性.
- 通过Mo兴奋剂确定了批量格子氧的精确调制作为选择性的关键.
- 显示增加V-O键的结合能量对的选择性至关重要.
结论:
- 使用Mo-V-O催化剂的CL-ODH方法为选择性脱提供了一个有希望的策略.
- 对催化剂的性能至关重要的是原子尺度的注和金属-氧键的调节.
- 这项研究为选择性氧化反应提供了金属氧化学的基本见解.
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