Cobalt tetramethoxyphenylporphyrin functionalized graphene for oxygen reduction reaction in neutral media

Zhang, Yezhen; Liu, Shanshan; Wang, Limin; Liu, Wenmin; Sun, Ruixue; Ye, Jianshan

doi:10.1016/j.matlet.2015.01.001

Cited by 12 publications

(7 citation statements)

References 18 publications

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“…Figure shows the UV‐vis spectroscopy of the GO, Co–CuTCPP, and Co–CuTCPP/rGO‐x in ethanol. The intense Soret band of the Co–CuTCPP at 414 nm demonstrates existence of the porphyrins . Compared with the Co–CuTCPP, the Co–CuTCPP/rGO has a new absorbance at 422 nm and an obvious red shift, which could be assigned to the charge and energy transfer interaction between the GO sheets and Co–CuTCPP, demonstrating the successful adsorption of the Co–CuTCPP onto the GO.…”

Section: Resultsmentioning

confidence: 94%

“…However, the metal active centers (Cu‐N−C) had been broken in the calcining processes. Meanwhile, the complex preparation process need high requirements to the equipment, which may also increase the cost . So, how to improve the catalytic performance of copper porphyrin for OER by a facile and eco‐friendly method is still highly desired.…”

Section: Introductionmentioning

confidence: 99%

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Bimetallic Porphyrin MOF Anchored onto rGO Nanosheets as a Highly Efficient 2D Electrocatalyst for Oxygen Evolution Reaction in Alkaline Conditions

et al. 2019

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Due to consequent non‐renewable resource consumption and environmental pollution,the renewable hydrogen energy has been a new energy candidate. But the sluggish kinetics of oxygen evolution reaction (OER) still hampersthe hydrogen production by water electrolysis. So, to design and synthesize an efficient OER catalyst for electrochemical conversion technologiesstill keeps challenge. Herein, an ideal precursor of bimetallic porphyrinicMOF (Co–CuTCPP)/reduced graphene oxide (Co–CuTCPP/rGO) composite has been fabricated by an ultrathin porphyrinic MOF (Co–CuTCPP) nanosheet loaded onto graphene oxide (GO)via hydrothermal process. Owing to synergetic effect of the rGOand bimetallic porphyrin MOF scaly structure, the optimized Co–CuTCPP/rGO‐10 catalyst exhibited high electrocatalytic activity with a low overpotential of 396 mV at 10 mA cm−2 and a Tafel slope of 58 mV dec−1, and had good stabilityin alkaline conditions. So, the lowcost, stable, and heterogeneous electrocatalyst might be a promising candidate for the OER devices in alkaline conditions without requirement of pyrolysis process.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Bimetallic Porphyrin MOF Anchored onto rGO Nanosheets as a Highly Efficient 2D Electrocatalyst for Oxygen Evolution Reaction in Alkaline Conditions

et al. 2019

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“…Co and Fe tetraphenyl porphyrin (CoTPP and FeTPP) were selected as catalysts for the ORR because of their strong – stacking interactions with the carbonaceous matrix (carbon Vulcan), used as substrate, and for the good electrocatalytic activity 60 – 64 . The band structure calculation shows that the amorphous carbon has metallic characteristic, as shown in supporting information Fig.…”

Section: Introductionmentioning

confidence: 99%

Evidence of carbon-supported porphyrins pyrolyzed for the oxygen reduction reaction keeping integrity

Orellana

Loyola

Marco

et al. 2022

Sci Rep

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Fe(III) 5,10,15,20-(tetraphenyl)porphyrin chloride (FeTPP) and Co(III) 5,10,15,20-(tetraphenyl)porphyrin chloride (CoTPP) were adsorbed on carbon Vulcan and studied as electrocatalysts for the oxygen reduction reaction (ORR) before and after pyrolysis. The pyrolysis process was also simulated through ab initio molecular dynamic simulations and the minimum energy path for the O2 dissociation after the interaction with the metal center of the FeTPP and CoTPP were calculated. After the pyrolysis the FeTPP showed the best performances reducing O2 completely to H2O with increased limiting current and lower overpotential. Tafel slops for the various catalysts did not change after the pyrolytic process suggesting that the mechanism for the ORR is not affected by the heat treatment. TEM images, X-ray diffraction, XPS spectroscopy, 57Fe Mössbauer, and DFT simulations, suggest that there is no breakdown of the macrocyclic complex at elevated temperatures, and that the macro cyclic geometry is preserved. Small variations in the Metal-O2 (M-O2) binding energies and the M–N bond length were observed which is attributed to the dispersive interaction between the macrocycles and the irregular surface of the Vulcan substrate induced by the heat treatment and causing better interaction with the O2 molecule. The theoretical strategy herein applied well simulate and explain the nature of the M–N–C active sites and the performances towards the ORR.

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“…The chemical functionalization of graphene oxide (GO) has attracted a great deal of attention because of its wide application [ 9 , 10 , 11 , 12 ], such as optical limiting property [ 13 ], energy conversion [ 14 ], biosensing systems [ 15 , 16 ], gas separating membranes [ 17 , 18 ], improved electric property [ 19 , 20 ], enhanced dispersibility [ 21 ] and thermal stability [ 22 ]. Several chemical functionalization methods designed to improve the dispersion of graphene in water were reported.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Reduction and Functionalization of Graphene Oxide by 4-Hydrazinobenzenesulfonic Acid for Polymer Nanocomposites

Qiao

Qiu

et al. 2016

Nanomaterials

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Graphene oxide (GO) was functionalized and reduced simultaneously by a new reductant, 4-hydrazinobenzenesulfonic acid (HBS), with a one-step and environmentally friendly process. The hydrophilic sulfonic acid group in HBS was grafted onto the surface of GO through a covalent bond. The successful preparation of HBS reduced GO (HBS-rGO) was testified by scanning electron microscope (SEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectra (FTIR), X-ray photoelectron spectroscopic (XPS) and thermogravimetric analysis (TGA). The interlayer space of HBS-rGO was increased to 1.478 nm from 0.751 nm for GO, resulting in a subdued Van der Waals’ force between layers and less possibility to form aggregations. The aqueous dispersibility of graphene was improved to 13.49 mg/mL from 0.58 mg/mL after the functionalization. The viscosity of the epoxy resin based HBS-rGO composite could be regulated by an adjustment of the content of HBS-rGO. This study provides a new and applicable approach for the preparation of hydrophilic functionalized graphene, and makes it possible for the application of graphene in some functional polymer nanocomposites, such as specialty water-based coatings.

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Cobalt tetramethoxyphenylporphyrin functionalized graphene for oxygen reduction reaction in neutral media

Cited by 12 publications

References 18 publications

Bimetallic Porphyrin MOF Anchored onto rGO Nanosheets as a Highly Efficient 2D Electrocatalyst for Oxygen Evolution Reaction in Alkaline Conditions

Bimetallic Porphyrin MOF Anchored onto rGO Nanosheets as a Highly Efficient 2D Electrocatalyst for Oxygen Evolution Reaction in Alkaline Conditions

Evidence of carbon-supported porphyrins pyrolyzed for the oxygen reduction reaction keeping integrity

Simultaneous Reduction and Functionalization of Graphene Oxide by 4-Hydrazinobenzenesulfonic Acid for Polymer Nanocomposites

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