Implanting Numerous Hydrogen-Bonding Networks in a Cu-Porphyrin-Based Nanosheet to Boost CH4 Selectivity in Neutral-Media CO2 Electroreduction.
Yi-Rong WangMing LiuGuang-Kuo GaoYi-Lu YangRu-Xin YangHui-Min DingYifa ChenShun-Li LiYa-Qian LanPublished in: Angewandte Chemie (International ed. in English) (2021)
The exploration of novel systems for the electrochemical CO2 reduction reaction (CO2 RR) for the production of hydrocarbons like CH4 remains a giant challenge. Well-designed electrocatalysts with advantages like proton generation/transferring and intermediate-fixating for efficient CO2 RR are much preferred yet largely unexplored. In this work, a kind of Cu-porphyrin-based large-scale (≈1.5 μm) and ultrathin nanosheet (≈5 nm) has been successfully applied in electrochemical CO2 RR. It exhibits a superior FE CH 4 of 70 % with a high current density (-183.0 mA cm-2 ) at -1.6 V under rarely reported neutral conditions and maintains FE CH 4 >51 % over a wide potential range (-1.5 to -1.7 V) in a flow cell. The high performance can be attributed to the construction of numerous hydrogen-bonding networks through the integration of diaminotriazine with Cu-porphyrin, which is beneficial for proton migration and intermediate stabilization, as supported by DFT calculations. This work paves a new way in exploring hydrogen-bonding-based materials as efficient CO2 RR catalysts.
Keyphrases
- metal organic framework
- room temperature
- electron transfer
- ionic liquid
- photodynamic therapy
- density functional theory
- gold nanoparticles
- single cell
- stem cells
- molecular dynamics
- molecularly imprinted
- label free
- cell therapy
- molecular docking
- risk assessment
- high resolution
- mass spectrometry
- quantum dots
- crystal structure