将Fe引入基于Cu的催化剂,以促进5-氧甲基的电催化化
Zhefei Zhao1,2,3, Ruopeng Yu1, Siqi Wang1
1Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
我们开发了类似纳米花的新型铜铁 (CuFe) 电催化剂,通过电催化化 (ECH) 将生物质衍生的5-甲 (HMF) 转化为2,5-二甲 (DHMF). 优化的催化剂实现了DHMF生产的高选择性和产量.
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:
- 从5-甲基 (HMF) 到2,5-二甲基 (DHMF) 的电催化化 (ECH) 是生物质转化的一个经济和环保的途径.
- 催化剂的性能依赖于调节电催化剂表面的 (H*) 和HMF吸附/激活.
研究的目的:
- 设计和合成基于CuFe的新型纳米花式电催化剂,支持铜泡 (CF),以实现高效的HMF化.
- 研究催化机制,了解Fe在增强选择性和活性方面的作用.
主要方法:
- 在铜泡 (CuFeOx/CF) 上合成基于CuFe的电催化剂.
- 电催化化 (ECH) 反应用于HMF转化.
- 在现场减弱总反射里埃变换红外光谱 (ATR-FTIR) 观测中间体.
- 现场拉曼光谱分析催化剂结构.
- 密度函数理论 (DFT) 计算以阐明反应机制.
主要成果:
- 最佳的CuFeOx/CF催化剂实现了93.3%的选择性和90.1%的DHMF产量.
- 现场光谱学证实了H*,HMF和产品的存在,并揭示了催化剂重建到低价值CuFe双金属.
- DFT的计算表明,Fe doping会改变Cu位点的电子结构,促进H*生成和HMF吸附,同时抑制二分化.
结论:
- 类似纳米花的CuFe基电催化剂对通过ECH从HMF生产高价值的DHMF有效.
- 在Cu电催化剂中加入Fe是一种有前途的策略,可以提高ECH反应的选择性和活性.
- 这项研究为设计用于生物质价值化的非贵金属双金属电催化剂提供了洞察力.
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