Freestanding Millimeter-Scale Porphyrin-Based Monoatomic Layers with 0.28â
nm Thickness for CO2 Electrocatalysis.
Angew Chem Int Ed Engl
; 59(43): 18954-18959, 2020 Oct 19.
Article
em En
| MEDLINE
| ID: mdl-32677725
ABSTRACT
Developing two-dimensional (2D) and single atomic layered materials is a fascinating challenge. Here we successfully synthesize porphyrin-based monoatomic layer (PML), a freestanding 2D porphyrin-based material of monomer-unit thickness (2.8â
Å). The solvothermal method provides a bottom-up approach for tailoring the monoatomic layer from the nanoscale to the milliscale. PMLs containing accurately tailorable M-N4 units (M=Cu and Au) were synthesized, which present metal center-dependent performance for CO2 electrocatalysis. PML with Cu-N4 centers performs high faradaic efficiencies of HCOO- and CH4 (80.86 % and 11.51 % at -0.7â
V, respectively) while PML with Au-N4 centers generates HCOO- and CO as major products (40.90 % and 34.40 % at -0.8â
V, respectively). Irreversible restructuring behavior of Cu sites is also observed. Based on the graphene-like properties and metal center-selectivity relationships, we believe that PML will play a distinct role in various applications.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article