为CO2的三协调单原子催化剂在大型膜电极组件中进行电解的格拉姆尺度制备
Lei Yuan1,2, Xin Li1, Guilin Li1
1Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 16, 2025
概括
一种新的,低成本的---- (Ni-N3) 单原子催化剂 (SAC) 能够有效地大规模将二氧化碳 (CO2) 电还原为一氧化碳 (CO). 这一突破为碳利用和二氧化碳生产提供了具有成本效益的解决方案.
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:
- 二氧化碳电还原的商业化受到贵金属催化剂的高成本和设备扩展挑战的阻碍.
- 高效的碳利用需要可扩展和负担得起的催化剂来转化二氧化碳.
研究的目的:
- 开发一种低成本的,格拉姆级单原子催化剂 (SAC),用于高效地将二氧化碳电还原为二氧化碳.
- 评估开发的催化剂在膜电极组件 (MEA) 细胞中的性能和可扩展性.
主要方法:
- 使用金属离子液体制造一个三协调的Ni-N3单原子催化剂 (SAC) 在克尺度上.
- 在2 × 2 cm2的MEA电池中测试催化剂的性能,以测试CO2电还原到CO (eCO2-to-CO) 的性能.
- 在扩大规模的10 × 10 cm2 MEA反应器中评估催化剂,用于连续CO2电解.
主要成果:
- 克尺度的Ni-N3 SAC (g-NiN3) 在2.8V的2×2cm2的MEA中实现了98.9%的eCO2-to-CO法拉代克效率.
- 在100小时的电解过程中,CO的选择性在100mA·cm-2.0的电解时超过了90%.
- 扩大规模的反应堆表现出97.1%的CO法拉代克效率和41.0%的CO2单通转换,能源效率为43.1%.
结论:
- g-NiN3催化剂代表了eCO2-to-CO的最先进系统,提供高效率和选择性.
- 扩展装置稳定地以高速率 (12.0 L·kW·h-1) 产生CO.
- 技术经济评估显示,二氧化碳生产成本为1.08美元/千克-1,显示出显著的利潜力.
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