Synthesis of nano-porous carbon and nitrogen doped carbon dots from an anionic MOF: a trace cobalt metal residue in carbon dots promotes electrocatalytic ORR activity

Bhattacharyya, S. P.; Konkena, Bharathi; Jayaramulu, Kolleboyina; Schuhmann, Wolfgang; Maji, Tapas Kumar

doi:10.1039/c7ta00281e

Cited by 108 publications

(57 citation statements)

References 53 publications

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“…In addition, the catalyst of Co@CN was prepared by Bhattacharyya et al. derived from AMOF and exhibited high ORR activity performance with E 1/2 at 0.73 V and

j_{L}

of −5.3 mA cm −2 . Gabe et al.…”

Section: Resultsmentioning

confidence: 99%

Restructured Fe−Mn Alloys Encapsulated by N‐doped Carbon Nanotube Catalysts Derived from Bimetallic MOF for Enhanced Oxygen Reduction Reaction

et al. 2018

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A set of novel catalysts FeMn/N‐CNTs that partly maintain the core‐shell structure have been prepared successfully by calcination of analogous MOF‐74, which has bimetallic species (Fe and Mn) and a cheap organic ligand (2, 5‐dihydroxylbenzoic acid, DHBA) with melamine as additional nitrogen source. These catalysts exhibit a distinctive microstructure of Fe−Mn alloys surrounded by N‐doped carbon nanotubes (CNTs). Electrochemical methods have been employed to investigate their activity in oxygen reduction reaction (ORR) in alkaline solution. The highest ORR performance of Fe3Mn1/N‐CNTs‐100 shows that the half wave potential is at 0.865 V and the kinetic current density (at 0.9 V) is 1.447 mA cm−2, which are higher than those of commercial Pt/C (0.855 V, 0.946 mA cm−2). In addition, Fe3Mn1/N‐CNTs‐100 is much more durable than commercial Pt/C under the conditions tested. The highly efficient ORR performance may be attributed to the unique microstructure and large surface area with appropriate pore size, as well as to the synergistic effects between the pyridinic N species and the Fe−Nx species that play important roles in ORR in alkaline solution. However, in acid medium, only Fe−Nx species catalyze ORR and pyridinic N species are limited to work as the active sites. This study may prompt others to explore the development of heteroatom‐doped CNTs surrounding particles as efficient catalyst for ORR and fuel cell applications.

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“…In addition, the catalyst of Co@CN was prepared by Bhattacharyya et al. derived from AMOF and exhibited high ORR activity performance with E 1/2 at 0.73 V and

j_{L}

of −5.3 mA cm −2 . Gabe et al.…”

Section: Resultsmentioning

confidence: 99%

Restructured Fe−Mn Alloys Encapsulated by N‐doped Carbon Nanotube Catalysts Derived from Bimetallic MOF for Enhanced Oxygen Reduction Reaction

et al. 2018

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“…Cyclic voltammetry (CV) in the O 2 ‐saturated solution showed an oxygen reduction peak at 0.54 and 0.59 V with respect to the reversible hydrogen electrode (RHE) for TAPA‐OPE‐mix and TAPA‐OPE‐gly, respectively (Figure ). Notably, this peak was absent in N 2 ‐saturated solution, which illustrates the electrocatalytic property of both CMPs toward the reduction of O 2 . Further, we performed linear sweep voltammetry (LSV) at different rotation speeds at a scan rate of 5 mV s −1 for both CMPs (Figure ).…”

Section: Resultsmentioning

confidence: 95%

Bimodal Heterogeneous Functionality in Redox‐Active Conjugated Microporous Polymer toward Electrocatalytic Oxygen Reduction and Photocatalytic Hydrogen Evolution

Singh

Verma

Samanta

et al. 2020

Chemistry A European J

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The designing and development of heterogeneous catalysts for conversion of renewable energy to chemical energies by electrochemical as well as photochemical processes is at the forefront of energy research. In this work, two new donor–acceptor‐based redox‐active conjugated microporous polymers (CMPs) (TAPA‐OPE‐mix and TAPA‐OPE‐gly) are synthesized through Schiff base condensation reaction using a microwave synthesizer. Notably, the asymmetric and symmetric bola‐amphiphilic nature of the OPE struts results in distinct nanostructuring and morphologies in the CMPs. Interestingly, both CMPs show impressive heterogeneous catalytic activity toward electrochemical O2 reduction and photocatalytic H2 evolution reactions, and therefore, act as bimodal electro‐ and photocatalytic porous organic materials. Furthermore, the redox‐active property of the CMPs is exploited for in situ generation and stabilization of platinum nanoparticles (Pt), and these Pt@CMPs exhibit significantly enhanced photocatalytic activity.

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“…The dimethyl amine (NH 2 Me 2 + ) cation resided in the aperture of MOF can act as the N source. Owing to the amine moiety, it is beneficial for exploiting N‐doped carbon materials . This technique proposes a new idea for developing N‐rich carbon materials without any additional N source.…”

Section: Diverse Regulating Factorsmentioning

confidence: 99%

Controllable Syntheses of MOF‐Derived Materials

Zou

2018

Chemistry A European J

133

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Metal-organic frameworks (MOFs), as an important kind of porous inorganic-organic hybrid materials with inherent outstanding physicochemistry characteristics, can be widely applied as versatile precursors for the facile preparation of functional MOF-derived materials. However, there are plenty of sophisticated factors during the synthetic process, which is far from reaching the goal of effectively controlling the nature of MOF-derived materials (such as the composition, morphology and surface area). Therefore, it is urgently necessary to develop regular protocols and concepts for controllable syntheses of MOF-derived materials. In this minireview, we mainly summarize and analyze complicated factors in the fabrication of MOF-derived materials according to recently reported literatures, and this provides a new insight into the rational design and syntheses of MOF-derived materials.

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Synthesis of nano-porous carbon and nitrogen doped carbon dots from an anionic MOF: a trace cobalt metal residue in carbon dots promotes electrocatalytic ORR activity

Abstract: Synthesis of nanoporous carbon (NPC-1) and N-doped C dots (NCD-1) has been reported from an anionic MOF. Co doping in NCD-1 enhances electrocatalytic ORR activity.

Cited by 108 publications

References 53 publications

Restructured Fe−Mn Alloys Encapsulated by N‐doped Carbon Nanotube Catalysts Derived from Bimetallic MOF for Enhanced Oxygen Reduction Reaction

Restructured Fe−Mn Alloys Encapsulated by N‐doped Carbon Nanotube Catalysts Derived from Bimetallic MOF for Enhanced Oxygen Reduction Reaction

Bimodal Heterogeneous Functionality in Redox‐Active Conjugated Microporous Polymer toward Electrocatalytic Oxygen Reduction and Photocatalytic Hydrogen Evolution

Controllable Syntheses of MOF‐Derived Materials

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