使用耐酸分子电催化剂进行二氧化碳减少的零间隙双极膜电解器
Bhavin Siritanaratkul1, Mark Forster1, Francesca Greenwell1
1Stephenson Institute for Renewable Energy and the Department of Chemistry, University of Liverpool, Liverpool L69 7ZF, United Kingdom.
Journal of the American Chemical Society
|April 22, 2022
概括
扩大电化学二氧化碳 (CO2) 减少需要克服碳酸盐的形成. 零间隔装置中的耐酸催化剂可选择性转化二氧化碳,证明了有效的碳捕获和利用的途径.
科学领域:
- 电化学
- 催化剂
- 碳捕获和利用
背景情况:
- 在性介质中碳酸盐的形成阻碍了电化学二氧化碳的缩放.
- 具有双极膜 (BPM) 的零间隙细胞提供了一个解决方案,但在酸性环境中面临着催化剂稳定性的挑战.
- 由于催化剂降解,的演变往往占比于BPM装置中的二氧化碳减少.
研究的目的:
- 在零间隙BPM装置中开发和评估耐酸电催化剂.
- 在BPM设置下的性条件下研究Ni分子电催化剂的性能.
- 使用纯水和二氧化碳料证明有效的二氧化碳转化.
主要方法:
- 使用零间隙细胞配置与反向偏差双极膜 (BPM).
- 使用耐酸Ni分子电催化剂减少二氧化碳.
- 用各种电流密度的纯水和二氧化碳来操作装置.
- 分析了产品的选择性,并确定了性能限制.
主要成果:
- 在零间隙BPM装置中使用耐酸Ni分子电催化剂实现了选择性CO2降低 (> 60%).
- 用纯水和二氧化碳料成功转化,避免碳酸盐的损失.
- 由于可逆性产品抑制,在较高电流密度 (100 mA cm-2) 时观察到CO选择性降低 (> 30%).
- 证实了Ni分子催化剂在BPM中的酸性环境中的可行性.
结论:
- 耐酸催化剂对于零间隙BPM装置的高效电化学二氧化碳减排至关重要.
- 分子电催化剂显示出选择性二氧化碳转化,克服碳酸盐形成和催化剂降解的挑战.
- 为了在更高的电流密度下优化性能,需要对减轻产品抑制进行进一步的研究.
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