在电化学CO2转化过程中通过氧化脉冲对抗SnO2降解
Sven Arnouts1,2, Kevin Van Daele1, Nick Daems1
1Applied Electrochemistry and Catalysis (ELCAT), University of Antwerp 2610 Wilrijk Belgium Tom.Breugelmans@uantwerpen.be.
概括
在二氧化碳电还原 (p-eCO2R) 中周期性无极脉冲增强了氧化催化剂的稳定性. 这种方法提高了格式生产效率,延长了催化剂寿命,以实现可持续的二氧化碳转化.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 金属氧化物催化剂对于二氧化碳电还原 (CO2RR) 是至关重要的.
- 这些催化剂的现场减少限制了它们的长期稳定性和效率.
- 周期性无极脉冲 (p-eCO2R) 是一种减轻催化剂降解的潜在策略.
研究的目的:
- 为了研究p-eCO2R对基于氧化的二氧化碳电还原催化剂的疗效.
- 评估p-eCO2R对催化剂稳定性和格式生产效率的影响.
- 为了证明使用氧化活性相的p-eCO2R的首次应用.
主要方法:
- 一个石榴结构的SnO2@C纳米圈催化剂的制造.
- 在CO2电还原过程中应用周期性,长时间的阳极脉冲 (30秒在0.2V与RHE).
- 对比p-eCO2R性能与6小时的标准潜在静态条件.
主要成果:
- p-eCO2R显著提高了对格式生产的法拉代克效率.
- 在p-eCO2R下的催化剂在6小时后保持了78 ± 2%的效率.
- 在同一时期,潜在静态条件导致效率降低 (71±6%).
结论:
- 在基于锡的系统中,p-eCO2R有效抵消催化剂降解.
- 这种脉冲式方法提高了催化剂的耐用性,以实现持续的二氧化碳转化.
- p-eCO2R为更可持续的电化学二氧化碳利用提供了一个有希望的途径.
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