TY - JOUR
T1 - Photo-electrochemical O2 Reduction to H2O2 Using a Co-Porphyrin Based Metal-Organic Framework
AU - Ifraemov, Raya
AU - Binyamin, Shahar
AU - Pearlmutter, Yanai
AU - Liberman, Itamar
AU - Shimoni, Ran
AU - Hod, Idan
N1 - Publisher Copyright:
© 2024 The Authors. ChemElectroChem published by Wiley-VCH GmbH.
PY - 2024/2/1
Y1 - 2024/2/1
N2 - Metal-Organic Frameworks (MOFs) hold great potential to be used as porous (photo)-electrocatalytic platforms containing large concentration of immobilized molecular catalysts. Indeed, the use of MOFs in a photo-electrochemical devices was recently demonstrated. However, so far there are no reports of MOFs used for photo-electrochemical O2 reduction to H2O2. Herein, we utilize a Co-porphyrin based MOF (Co-MOF-525), that produces H2O2 at high faradaic efficiency (95 %), both electrochemically and photo-electrochemically. Electrochemical characterization show that the active catalytic site is a MOF-tethered Co(I)-porphyrin. Additionally, under light illumination, the MOF's intrinsic catalytic rate is significantly accelerated compared to dark electrolysis conditions. Thus, this work could open a path for future implementation of photoactive MOFs in solar fuel schemes.
AB - Metal-Organic Frameworks (MOFs) hold great potential to be used as porous (photo)-electrocatalytic platforms containing large concentration of immobilized molecular catalysts. Indeed, the use of MOFs in a photo-electrochemical devices was recently demonstrated. However, so far there are no reports of MOFs used for photo-electrochemical O2 reduction to H2O2. Herein, we utilize a Co-porphyrin based MOF (Co-MOF-525), that produces H2O2 at high faradaic efficiency (95 %), both electrochemically and photo-electrochemically. Electrochemical characterization show that the active catalytic site is a MOF-tethered Co(I)-porphyrin. Additionally, under light illumination, the MOF's intrinsic catalytic rate is significantly accelerated compared to dark electrolysis conditions. Thus, this work could open a path for future implementation of photoactive MOFs in solar fuel schemes.
KW - heterogenous catalysis
KW - hydrogen peroxide generation
KW - metal-organic frameworks
KW - oxygen reduction reaction
KW - photo-electrochemical cells
KW - rotating ring-disk electrode
UR - http://www.scopus.com/inward/record.url?scp=85182469108&partnerID=8YFLogxK
U2 - 10.1002/celc.202300422
DO - 10.1002/celc.202300422
M3 - Article
AN - SCOPUS:85182469108
SN - 2196-0216
VL - 11
JO - ChemElectroChem
JF - ChemElectroChem
IS - 3
M1 - e202300422
ER -