Li Shoujie, Chen Wei, Dong Xiao, Zhu Chang, Chen Aohui, Song Yanfang, Li Guihua, Wei Wei, Sun Yuhan
Low-Carbon Conversion Science and Engineering Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, PR China.
University of Chinese Academy of Sciences, Beijing, 100049, PR China.
Nat Commun. 2022 Jun 2;13(1):3080. doi: 10.1038/s41467-022-30733-6.
Efficient conversion of CO to commodity chemicals by sustainable way is of great significance for achieving carbon neutrality. Although considerable progress has been made in CO utilization, highly efficient CO conversion with high space velocity under mild conditions remains a challenge. Here, we report a hierarchical micro/nanostructured silver hollow fiber electrode that reduces CO to CO with a faradaic efficiency of 93% and a current density of 1.26 A · cm at a potential of -0.83 V vs. RHE. Exceeding 50% conversions of as high as 31,000 mL · g · h CO are achieved at ambient temperature and pressure. Electrochemical results and time-resolved operando Raman spectra demonstrate that enhanced three-phase interface reactions and oriented mass transfers synergistically boost CO production.
通过可持续方式将一氧化碳高效转化为商品化学品对于实现碳中和具有重要意义。尽管在一氧化碳利用方面已经取得了相当大的进展，但在温和条件下以高时空速度进行高效一氧化碳转化仍然是一个挑战。在此，我们报道了一种分级微/纳米结构的银空心纤维电极，该电极在相对于可逆氢电极（RHE）为-0.83 V的电位下，将一氧化碳还原为一氧化碳的法拉第效率为93%，电流密度为1.26 A·cm。在室温和常压下，实现了高达31,000 mL·g·h一氧化碳超过50%的转化率。电化学结果和时间分辨的原位拉曼光谱表明，增强的三相界面反应和定向传质协同促进了一氧化碳的生成。
