Fan Tingting, Wu Qiuling, Yang Zhou, Song Yipeng, Zhang Jiguang, Huang Pingping, Chen Zhou, Dong Yunyun, Fang Weiping, Yi Xiaodong
National Engineering Laboratory for Green Chemical Productions of, Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China.
College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P.R. China.
ChemSusChem. 2020 May 22;13(10):2677-2683. doi: 10.1002/cssc.201903558. Epub 2020 Mar 31.
Electrochemical conversion of CO into valuable products by utilizing renewable electricity is a thriving research field. For electrochemical reduction of CO to CO, uniform sponge-like porous Ag nanocubes (SPC-Ag) integrated on carbon paper are prepared by using an electrochemically driven method. The SPC-Ag has a 3 D porous structure and a large specific surface area, which affords abundant active sites for the CO reduction reaction (CO RR), as well as reducing impedance to accelerate the CO RR kinetics. This distinctive organization affords SPC-Ag with outstanding electrocatalytic performance for CO reduction to CO. High faradaic efficiency (>90 %) and large partial current density for CO with excellent durability are observed in a wide potential window, with a maximum value of 93 % at -0.9 V versus reversible hydrogen electrode.
利用可再生电力将CO电化学转化为有价值的产品是一个蓬勃发展的研究领域。为了将CO电化学还原为CO，采用电化学驱动的方法制备了集成在碳纸上的均匀海绵状多孔Ag纳米立方体（SPC-Ag）。SPC-Ag具有三维多孔结构和大比表面积，为CO还原反应（CO RR）提供了丰富的活性位点，同时降低了阻抗以加速CO RR动力学。这种独特的结构赋予SPC-Ag优异的将CO还原为CO的电催化性能。在较宽的电位窗口内观察到了高法拉第效率（>90%）和较大的CO分电流密度，且具有出色的耐久性，相对于可逆氢电极在-0.9 V时最大值为93%。
