| Literature DB >> 34355835 |
Nivedita Sikdar1, João R C Junqueira1, Stefan Dieckhöfer1, Thomas Quast2, Michael Braun3, Yanfang Song1, Harshitha B Aiyappa1, Sabine Seisel1, Jonas Weidner1, Denis Öhl1, Corina Andronescu3, Wolfgang Schuhmann4.
Abstract
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 CuxOyCz nanostruc-tured electrocatalysts derived from a Cu-based MOF as porous self-sacrificial template. Blending catalysts with polytetrafluoroethylene (PTFE) on gas diffusion electrodes (GDEs) suppressed the compete-tive hydrogen evolution reaction. 25 to 50 wt% teflonized GDEs exhi-bited a Faradaic efficiency of ~54% for C2+ products at -80 mA/cm2. The local OH- ions activity of PTFE-modified GDEs was assessed by means of closely positioning a Pt-nanoelectrode. A a substantial increase in the OH-/H2O activity ratio due to the locally generated OH- ions at increasing current densities was determined irrespective of the PTFE amount.Entities:
Keywords: CO2 Reduction; electrocatalysis; gas diffusion electrode; local pH-value; metalorganiczzm321990frameworks
Year: 2021 PMID： 34355835 DOI： 10.1002/anie.202108313
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN： 1433-7851 Impact factor: 15.336