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- W4366256937 abstract "In the carbon dioxide reduction reaction (CO2RR), the activity of transition metal center depends largely on its electronic structure, since the electronic rich region enhances the adsorption of intermediates at active sites, thus improving the selectivity to reduction products. In this work, we prepared CuPc/DG composite (CuPc: copper phthalocyanine; DG: defective graphene) to achieve selective CO2-to-formic acid (HCOOH) electrochemical conversion through modulating the electronic structure of Cu active centers with DG via π-π stacking. Evaluated as the electrocatalyst, the CuPc/DG composite displays a high faradaic efficiency (FE) of 44.6% −0.78 V vs. RHE for CO2RR to HCOOH. Partial current density is 5.28 mA cm−2 for HCOOH together with an exceptional stability throughout at least 20 h of reaction. On the basis of density functional theory (DFT) calculation results, defects in DG can effectively promote the charge redistribution of dispersed CuPc, where electrons transfer to CuPc from defects, forming rich electronic environment around Cu sites. The abundance of electrons makes the d-band center of Cu approach to the Fermi level and decrease the energy barrier of CuPc/DG composite for the intermediate of ∗OCHO, thus accelerating the reduction of CO2 to HCOOH." @default.
- W4366256937 created "2023-04-20" @default.
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- W4366256937 date "2023-04-01" @default.
- W4366256937 modified "2023-10-16" @default.
- W4366256937 title "Selective CO2-to-formic acid electrochemical conversion by modulating electronic environment of copper phthalocyanine with defective graphene" @default.
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- W4366256937 doi "https://doi.org/10.1016/j.cjsc.2023.100089" @default.
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