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Transition-Metal Porphyrin-Based MOFs In Situ-Derived Hybrid Catalysts for Electrocatalytic CO2Reduction
- Source :
- Inorganic Chemistry; May 2024, Vol. 63 Issue: 19 p8948-8957, 10p
- Publication Year :
- 2024
-
Abstract
- Excellent electrocatalytic CO2reduction reaction activity has been demonstrated by transition metals and nitrogen-codoped carbon (M–N–C) catalysts, especially for transition-metal porphyrin (MTPP)-based catalysts. In this work, we propose to use one-step low-temperature pyrolysis of the isostructural MTPP-based metal–organic frameworks (MOFs) and electrochemical in situ reduction strategies to obtain a series of hybrid catalysts of Co nanoparticles (Co NPs) and MTPP, named Co NPs/MTPP (M = Fe, Co, and Ni). The in situ introduction of Co NPs can efficiently enhance the electrocatalytic ability of MTPP (M = Fe, Co, and Ni) to convert CO2to CO, particularly for FeTPP. Co NPs/FeTPP endowed a high CO faradaic efficiency (FECOmax= 95.5%) in the H cell, and the FECO> 90.0% is in the broad potential range of −0.72 to −1.22 VRHE. In addition, the Co NPs/FeTPP achieved 145.4 mA cm–2at a lower potential of −0.70 VRHEwith an FECOof 94.7%, and the CO partial currents increased quickly to reach 202.2 mA cm–2at −0.80 VRHEwith an FECOof 91.6% in the flow cell. It is confirmed that Co NPs are necessary for hybrid catalysts to get superior electrocatalytic activity; Co NPs also can accelerate H2O dissociation and boost the proton supply capacity to hasten the proton-coupled electron-transfer process, effectively adjusting the adsorption strength of the reaction intermediates.
Details
- Language :
- English
- ISSN :
- 00201669 and 1520510X
- Volume :
- 63
- Issue :
- 19
- Database :
- Supplemental Index
- Journal :
- Inorganic Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs66358869
- Full Text :
- https://doi.org/10.1021/acs.inorgchem.4c01049