Cobalt porphyrin intercalation into zirconium phosphate layers for electrochemical water oxidation

A cobalt porphyrin molecule, namely CoTcPP (TcPP = the dianion of meso -tetra(4-carboxyphenyl)porphyrin), is intercalated into zirconium phosphate (ZrP) layers as an effective way to heterogenize a porphyrin-based molecular electrocatalyst. Fourier-transform infrared (FT-IR) spectroscopy, X-ray powd...

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Bibliographic Details
Published in:Sustainable energy & fuels 2021-01, Vol.5 (2), p.43-437
Main Authors: Barraza Alvarez, Isabel, Wu, Yanyu, Sanchez, Joel, Ge, Yulu, Ramos-Garcés, Mario V, Chu, Tong, Jaramillo, Thomas F, Colón, Jorge L, Villagrán, Dino
Format: Article
Language:English
Subjects:
Anions
Aqueous solutions
Catalysts
Cobalt
Durability
Electrocatalysts
Electrochemistry
Fourier transforms
Inductively coupled plasma mass spectrometry
Infrared spectroscopy
Intercalation
Mass spectrometry
Mass spectroscopy
NMR
Nuclear magnetic resonance
Oxidation
Photoelectron spectroscopy
Photoelectrons
Porphyrins
Spectroscopy
X ray photoelectron spectroscopy
X ray powder diffraction
Zirconium
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Summary:A cobalt porphyrin molecule, namely CoTcPP (TcPP = the dianion of meso -tetra(4-carboxyphenyl)porphyrin), is intercalated into zirconium phosphate (ZrP) layers as an effective way to heterogenize a porphyrin-based molecular electrocatalyst. Fourier-transform infrared (FT-IR) spectroscopy, X-ray powder diffraction (XRPD) measurements, UV-Vis spectroscopy, elemental mapping, energy dispersive X-ray (EDX) analysis, inductively coupled plasma mass spectrometry (ICP-MS) and X-ray photoelectron spectroscopy (XPS) were utilized to determine the successful intercalation of CoTcPP into ZrP. While the CoTcPP molecule is not amendable to be used as a heterogeneous catalyst in basic environment due to the carboxylic groups, the intercalated species (CoTcPP/ZrP) is effective towards water oxidation from KOH aqueous solution when utilized as a heterogeneous electrocatalyst and shows remarkable catalytic durability. Electrochemical results show that CoTcPP/ZrP requires an overpotential of 0.467 V to achieve a current density of 10 mA cm −2 while the pristine α-ZrP shows negligible electrocatalytic OER behavior. A cobalt porphyrin molecule, namely CoTcPP (TcPP = the dianion of meso -tetra(4-carboxyphenyl)porphyrin), is intercalated into zirconium phosphate (ZrP) layers as an effective way to heterogenize a porphyrin-based molecular electrocatalyst.
ISSN:2398-4902
2398-4902
DOI:10.1039/d0se01134g