通过改善双金属节点的质量转移和电荷转移来增强进化反应
Zhihui Li1, Xinyu Zhang1, Yiran Teng2
1Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC), Jiangsu Engineering and Technology Research Center of Environmental Cleaning Materials (ECM), Joint International Research Laboratory of Climate and Environment Change (ILCEC), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, 219 Ningliu Road, Nanjing 210044, China.
开发双金属NiCo-BTC电催化剂显著提高了演化反应 (HER) 的性能. 一个新的甲醇氧化反应 (MOR) 电解电池节省能源,提高低成本气生产的效率.
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:
- 通过水电解生产的高成本阻碍了商业化.
- 高效的电催化剂和创新的电解电池对于经济高效的气发电至关重要.
- 双金属金属有机框架 (MOFs) 提供了一个有前途的策略,以提高电催化性能,而不是单金属MOFs.
研究的目的:
- 为演化反应 (HER) 合成和评估双金属NiCo-BTC.
- 与Ni-BTC相比,研究NiCo-BTC的电化学特性和催化机制.
- 开发和评估一种利用甲醇氧化反应 (MOR) 产生的新型电解电池.
主要方法:
- 双金属NixCo<0xE1><0xB5><0xA7>-BTC的热水合成.
- 电化学特征包括循环电压测量,电化学阻抗光谱 (EIS) 和线性扫描电压测量.
- 电子磁共振 (EPR) 和密度函数理论 (DFT) 的计算.
- 基于甲醇氧化反应 (MOR) 的电解细胞的制造和测试.
主要成果:
- 对于HER,Ni0.8Co0.2-BTC在 -0.203 V 与 RHE 之间达到10 mA cm−2,明显低于Ni-BTC (-0.341 V 与 RHE).
- 尼科-BTC表现出更好的电荷和质量转移动力学,由EIS和DRT分析证实.
- DFT的计算表明,在NiCo-BTC上有有利的H+,OH−和H2O吸附.
- 基于MOR的电解电池在1.85V下运行,达到50mA cm-2,与基于OER的电池相比,节省了16.7%的能量,具有更高的法拉第效率 (98.2% vs 94.5%).
结论:
- 双金属NiCo-BTC由于增强的质量转移和电子特性,对HER表现出优越的电催化活性.
- 开发的基于MOR的电解电池为气生产提供了更节能和有效的途径.
- 这项研究提出了推进低成本气发电技术的可行战略.
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