The Growth of Photoactive Porphyrin-Based MOF Thin Films Using the Liquid-Phase Epitaxy Approach and Their Optoelectronic Properties

Ndjawa, Guy Olivier Ngongang; Tchalala, Mohamed Rachid; Shekhah, Osama; Khan, Jafar Iqbal; Mansour, Ahmed E.; Czaban‐Jóźwiak, Justyna; Weseliński, Łukasz J.; Ahsaine, Hassan Ait; Amassian, Aram; Eddaoudi, Mohamed

doi:10.3390/ma12152457

Cited by 13 publications

(5 citation statements)

References 38 publications

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“…This lower angle diffraction peak might correspond to the formation of small covalent assemblies of PhFCC molecules during low-temperature pyrolysis (400-500 °C). [54][55][56] However, this lower angle diffraction peak was neither found in the pristine samples nor in catalysts pyrolyzed at higher temperatures. Graphitic diffraction peaks at 2θ values of 26°, 42.8°, and 44.5° were attributed to the (002), (100), and (101) reflections of MWCNT, respectively, in all catalysts.…”

Section: Characterization Of Mwcnt-supported Phfcc Electrocatalystsmentioning

confidence: 87%

Synergistic Dual‐Atom Molecular Catalyst Derived from Low‐Temperature Pyrolyzed Heterobimetallic Macrocycle‐N4 Corrole Complex for Oxygen Reduction

Samireddi

Aishwarya

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et al. 2021

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layer are a major drawback to their cost-effective commercialization. To date, although platinum-group metal-based catalysts have been recognized as the best-performing ORR electrocatalysts, their future use as cathode catalysts is limited by scarcity and high costs, meaning that alternative economic cathode catalysts are greatly needed. [1] Among tremendous research efforts toward developing non-precious electrocatalysts, transition-metal-based metal-N4 (MN4) macrocyclic compounds have emerged as promising non-platinum group metal electrocatalysts after the pioneering breakthrough of Jasinski in 1964, who reported a cobalt phthalocyaninebased electrocatalyst. [2] Recent studies have reported a broad range of macrocyclic MN4 centers, such as Co and Fecoordinated porphyrins, phthalocyanines, corrins, and corroles, that possess promising non-precious metal active catalytic sites for the ORR. [2][3][4][5] A common feature of these macrocyclic MN4 systems is a single transition metal atom with biomimetic ligands, and with the maintenance of these single-metal-atom MN4 active sites as electrocatalysts being the most important factor in improving the ORR. Therefore, the use of these N4 macrocyclic complexes for developing A heterobimetallic corrole complex, comprising oxygen reduction reaction (ORR) active non-precious metals Co and Fe with a corrole-N4 center (PhFCC), is successfully synthesized and used to prepare a dual-atom molecular catalyst (DAMC) through subsequent low-temperature pyrolysis. This low-temperature pyrolyzed electrocatalyst exhibited impressive ORR performance, with onset potentials of 0.86 and 0.94 V, and half-wave potentials of 0.75 and 0.85 V, under acidic and basic conditions, respectively. During potential cycling, this DAMC displayed half-wave potential losses of only 25 and 5 mV under acidic and alkaline conditions after 3000 cycles, respectively, demonstrating its excellent stability. Single-cell Nafion-based proton exchange membrane fuel cell performance using this DAMC as the cathode catalyst showed a maximum power density of 225 mW cm −2 , almost close to that of most metal-N4 macrocycle-based catalysts. The present study showed that preservation of the defined CoN4 structure along with the cocatalytic Fe-Cx site synergistically acted as a dual ORR active center to boost overall ORR performance. The development of DAMC from a heterobimetallic CoN4macrocyclic system using low-temperature pyrolysis is also advantageous for practical applications.

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Section: Characterization Of Mwcnt-supported Phfcc Electrocatalystsmentioning

confidence: 87%

Synergistic Dual‐Atom Molecular Catalyst Derived from Low‐Temperature Pyrolyzed Heterobimetallic Macrocycle‐N4 Corrole Complex for Oxygen Reduction

Samireddi

Aishwarya

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et al. 2021

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“…In industry, MOVPE is likely to dominate by more than one order of magnitude. Two other papers used Liquid Phase Epitaxy [8] and magnetron sputtering [10]. Both techniques are much cheaper than MOVPE and MBE, and may find, in future, some niche applications.…”

Section: Epitaxial Growth Methodsmentioning

confidence: 99%

“…Photovoltaic applications are represented by polymorphism-based MOF (metalorganic frameworks) [ 8 ]. Many electronic devices, as memories, thermochromic smart windows, or Mott field effect transistors, are based on vanadium oxide, as described by Yuanjun Yang [ 9 ].…”

Section: Applications Of the Materials Examinedmentioning

confidence: 99%

Special Issue “Advances in Epitaxial Materials”-Editorial Preface

Leszczyński

2020

Materials

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In this Special Issue, we have 10 excellent papers on epitaxy. In this editorial preface, I will make comments on the following issues: (1) applications of the materials examined, (2) lattice mismatch, (3) epitaxial growth methods used, (4) characterization methods used, (5) material problems: solved and still to be solved. The “Advances in Epitaxial Materials” has a big advantage of having, in one issue, papers on different materials, but in every paper the reader should find interesting information on epitaxial growth and characterization.

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“…The organic elements, TCPP, Pd‐TCPP, and Pt‐TCPP show Soret bands (404 nm) and Q‐bands (508–647 nm) all at a similar position. For the spectra of TCPP, the observed four Q‐bands are typically an indicator that the porphyrin is not metallated [26] . For the Pd‐MOF and the Pt‐MOF also characteristic peaks of the porphyrins are observed, i.e.…”

Section: Figurementioning

confidence: 97%

2D Metal–Organic Framework Nanosheets based on Pd‐TCPP as Photocatalysts for Highly Improved Hydrogen Evolution

Kim,

Wu,

Zdrazil

et al. 2024

Angew Chem Int Ed

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In this report, a 2D MOF nanosheet derived Pd single‐atom catalyst, denoted as Pd‐MOF, was fabricated and examined for visible light photocatalytic hydrogen evolution reaction (HER). This Pd‐MOF can provide a remarkable photocatalytic activity (a H2 production rate of 21.3 mmol/gh in the visible range), which outperforms recently reported Pt‐MOFs (with a H2 production rate of 6.6 mmol/gh) with similar noble metal loading. Notably, this high efficiency of Pd‐MOF is not due to different chemical environment of the metal center, nor by changes in the spectral light absorption. The higher performance of the Pd‐MOF in comparison to the analogue Pt‐MOF is attributed to the longer lifetime of the photogenerated electron‐hole pairs and higher charge transfer efficiency.

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The Growth of Photoactive Porphyrin-Based MOF Thin Films Using the Liquid-Phase Epitaxy Approach and Their Optoelectronic Properties

Cited by 13 publications

References 38 publications

Synergistic Dual‐Atom Molecular Catalyst Derived from Low‐Temperature Pyrolyzed Heterobimetallic Macrocycle‐N4 Corrole Complex for Oxygen Reduction

Synergistic Dual‐Atom Molecular Catalyst Derived from Low‐Temperature Pyrolyzed Heterobimetallic Macrocycle‐N4 Corrole Complex for Oxygen Reduction

Special Issue “Advances in Epitaxial Materials”-Editorial Preface

2D Metal–Organic Framework Nanosheets based on Pd‐TCPP as Photocatalysts for Highly Improved Hydrogen Evolution

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