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工程氧介质在无形NiFe合金上吸附,用于高活性和选择性的电化学生物质转化

Lei Shi¹, Weizheng Cai², Feng Zhang¹

¹Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150001, P. R. China.

Angewandte Chemie (International ed. in English)

|January 28, 2025

概括

在无形NiFeB合金中的兴奋剂增强了5-甲 (HMF) 到2,5-甲酸 (FDCA) 的电化学氧化,通过优化氧介质吸附,达到88%的选择性.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

电化学氧化5-基甲基 (HMF) 是一个关键的生物质转化途径.
氧进化反应 (OER) 经常存在竞争,从而降低了对所需产品的选择性,例如2,5-furandicarboxylic acid (FDCA).
无形NiFe合金被探索为催化剂,但优化选择性仍然是一个挑战.

研究的目的:

开发一种用于无形NiFe合金的兴奋剂策略,以增强选择性电化学HMF氧化到FDCA.
调查兴奋剂对氧中间体吸附和催化性能的影响.
为了阐明FDCA形成的反应途径.

主要方法:

与 (Mn) 和 (Mo) 合的无形NiFeB合金的合成.
电化学表征包括循环电压测量和时电压测量.
操作和现场光谱技术 (例如红外光谱) 用于研究反应机制.
表面表征分析电子特性和中间吸附.

主要成果:

无形的Mn-doped NiFeB合金对HMF氧化具有较低的开始潜力 (1.35V与RHE).
在1.4V与RHE之间实现了100%的HMF转换和88%的FDCA选择性.
胺兴奋剂优化了电子密度,与未兴奋剂和胺兴奋剂合金相比,加强了氧中间吸附.
操作研究证实了活性Ni3+物种形成的发病潜力降低.
在现场的红外光谱检测显示了HMFCA路径,而不是DFF,用于FDCA生产.

结论:

无形NiFeB合金的轻松合是一种有效的策略,可以促进选择性的电化学HMF氧化到FDCA.
胺兴奋剂通过调整电子结构和中间吸附,显著提高了催化性能.
这项研究提供了对选择性HMF氧化途径的机制性见解,有利于HMFCA中间体的形成.

关键词:

5-基甲基酸的氧化过程合金化合金化合金化电触媒溶解是一种电触媒.有氧物种的吸附吸附.

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