Rahimi Mohammad, Catalini Giulia, Puccini Monica, Hatton T Alan
Department of Chemical Engineering, Massachusetts Institute of Technology Cambridge MA 02139 USA
Department of Civil and Industrial Engineering, University of Pisa Largo Lucio Lazzarino 2 561226 Pisa Italy.
RSC Adv. 2020 Apr 29;10(29):16832-16843. doi: 10.1039/d0ra02450c.
A thorough experimental investigation of a bench-scale apparatus of the proton concentration process with two symmetrical MnO electrodes is presented, with the aim of continuous desorption of CO from a KCO solution. The electrodes were fabricated through cathodic deposition, and their chemical states, morphology, and microstructural architecture were characterized with X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Successful formation of MnO film was confirmed by XPS analysis, and the SEM images showed a uniform distribution of the film across the carbon substrate surface and along the strand, with an average thickness of ∼500 nm, thus making proton ion diffusion possible. Continuous and efficient desorption of CO from a KCO solution was obtained when electrodeposited MnO electrodes were used in a flow-based proton concentration process. The amount of CO desorbed per area of the electrode was 12-fold higher than that of a similar system. The electrochemical nature of the proton concentration process offers substantial practical advantages for the future, especially if electricity can be sustainably produced from renewable sources.
本文介绍了对一种带有两个对称MnO电极的质子浓缩过程的台式装置进行的全面实验研究，目的是从KCO溶液中连续解吸CO。电极通过阴极沉积制备，并用X射线光电子能谱（XPS）和扫描电子显微镜（SEM）对其化学状态、形态和微观结构进行了表征。XPS分析证实了MnO膜的成功形成，SEM图像显示该膜在碳基底表面和沿碳链均匀分布，平均厚度约为500nm，从而使质子离子扩散成为可能。当将电沉积MnO电极用于基于流动的质子浓缩过程时，从KCO溶液中实现了连续且高效的CO解吸。电极单位面积解吸的CO量比类似系统高12倍。质子浓缩过程的电化学性质为未来提供了显著的实际优势，特别是如果能从可再生能源可持续地生产电力的话。
