法拉第效率
合成气
催化作用
水溶液
选择性
电化学
无机化学
化学
电催化剂
钴
材料科学
化学工程
电极
物理化学
有机化学
工程类
作者
Shi‐Yuan Zhang,Yuanyuan Yang,Yue‐Qing Zheng,Hong–Lin Zhu
标识
DOI:10.1016/j.jssc.2018.04.007
摘要
Electrocatalytic reduction of CO2 to useful fuels or chemicals is a promising path for carbon recycling. In this study, a novel mixed-metallic MOF [Ag4Co2(pyz)PDC4][Ag2Co(pyz)2PDC2] was synthesized, and it transformed into Ag doped Co3O4 catalyst, which exhibits excellent electro-catalytic performance for reduction of CO2 in water to syngas (H2 + CO). The as-prepared Ag/Co3O4 material exhibits a high selectivity of CO in 0.1 M KHCO3 aqueous solution (CO2 saturated) with the corresponding faradaic efficiency up to 55.6%. Compared with the Ag/Co3O4 electrode, the maximum faradaic efficiency (FE) of CO of pure Co3O4 is 21.3% at − 1.8 V vs. SCE. The results show that the presence of Ag can improve the efficiency of CO significantly, thereby inhibiting the production of H2. The stability of the samples can be maintained for more than 10 h at − 1.8 V vs. SCE. The ratio of production between H2 and CO can be controlled by varying the potential values.
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