催化作用
电化学
法拉第效率
材料科学
电催化剂
化学
氧化还原
化学工程
离子
多孔性
扩散
电极
无机化学
纳米技术
物理化学
有机化学
复合材料
热力学
物理
工程类
作者
Nivedita Sikdar,João R. C. Junqueira,Stefan Dieckhöfer,Thomas Quast,Michael Braun,Yuxin Song,Harshitha Barike Aiyappa,Sabine Seisel,Jonas Weidner,Denis Öhl,Corina Andronescu,Wolfgang Schuhmann
标识
DOI:10.1002/anie.202108313
摘要
Developing highly efficient and selective electrocatalysts for the CO2 reduction reaction to produce value-added chemicals has been intensively pursued. We report a series of Cux Oy Cz nanostructured electrocatalysts derived from a Cu-based MOF as porous self-sacrificial template. Blending catalysts with polytetrafluoroethylene (PTFE) on gas diffusion electrodes (GDEs) suppressed the competitive hydrogen evolution reaction. 25 to 50 wt % teflonized GDEs exhibited a Faradaic efficiency of ≈54 % for C2+ products at -80 mA cm-2 . The local OH- ions activity of PTFE-modified GDEs was assessed by means of closely positioning a Pt-nanoelectrode. A substantial increase in the OH- /H2 O activity ratio due to the locally generated OH- ions at increasing current densities was determined irrespective of the PTFE amount.
科研通智能强力驱动
Strongly Powered by AbleSci AI