MOF-templated cobalt nanoparticles embedded in nitrogen-doped porous carbon: a bifunctional electrocatalyst for overall water splitting

Nath, Karabi; Bhunia, Kousik; Pradhan, Debabrata; Biradha, Kumar

doi:10.1039/c9na00169g

Cited by 27 publications

(21 citation statements)

References 70 publications

(88 reference statements)

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“…Recently, we reported the formation of a nanocomposite from a three-dimensional porous Co-MOF ( Co-AOIA ) . The presence of an anthracene moiety and DMF as a N-source in Co-AOIA helped in the formation of a Co nanoparticle embedded N-doped porous carbon ( Co@NPC1 ) upon carbonization.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks and Metal–Organic Framework-Derived N-Doped Porous Carbon Materials as Heterogeneous Catalysts: Chemical Fixation of Carbon Dioxide under Mild Conditions and Electrochemical Hydrogen Evolution

Nath

Karan

Biradha

2019

Crystal Growth & Design

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Two flexible tetracarboxylic acids with ether (H 4 AOIA) and amine (H 4 ANIA) linkages have been employed for the formation of two distinct Co-metal−organic frameworks (MOFs) with diverse architectures. Both the MOFs were shown to demonstrate remarkable catalytic activities for the chemical conversion of CO 2 into cyclic carbonates under ambient reaction conditions with considerably high turnover number values. Further, carbonization of the two-dimensional-MOF, Co-ANIA, under inert atmospheric conditions at a temperature of 800 °C resulted in the formation of cobalt containing N-doped nanocomposite (Co@ NPC2). In the context of generation of a sustainable source of energy and to carry out successive conversions, the singlecomponent nanocomposite, Co@NPC2, was shown to act as an efficient cost-effective non-noble metal electrocatalyst through its electrochemical activity toward hydrogen evolution.

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Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks and Metal–Organic Framework-Derived N-Doped Porous Carbon Materials as Heterogeneous Catalysts: Chemical Fixation of Carbon Dioxide under Mild Conditions and Electrochemical Hydrogen Evolution

Nath

Karan

Biradha

2019

Crystal Growth & Design

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“…This indicated that it may have been reduced by carbon or by the N 2 gas atmosphere, which subsequently evaporated at elevated temperatures and the remaining are further removed by acid leaching . The XRD spectra of Nb/Co–N–C and Mo/Co–N–C were similar to Co–N–C with a hump at 44°, indicating the presence of carbon (100) in the samples, but the Nb/Co–N–C sample also exhibited a small peak of the cobalt (111) plane according to the JCPDS card 15-0806 . The Bi/Co–N–C sample had one noticeable Bi peak of the (012) plane at 27° (JCPDS card 41-1246), indicating that metallic bismuth NPs were also present in the sample, which were confirmed by elemental mapping and XPS.…”

Section: Resultsmentioning

confidence: 99%

Cobalt-Based Incorporated Metals in Metal–Organic Framework-Derived Nitrogen-Doped Carbon as a Robust Catalyst for Triiodide Reduction in Photovoltaics

et al. 2021

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The development of cost-effective electrocatalysts is a key challenge for facilitating advanced electrochemical energyconversion technologies. In this study, transition metals (niobium, bismuth, and molybdenum)-/cobalt-assisted nitrogen-doped carbon electrocatalysts with a unique rhombic dodecahedron structure were fabricated via pyrolysis of the Co-metal organic framework. Solar cells fabricated using the Mo/Co−N−C counter electrode (CE) exhibited a significantly higher power conversion efficiency (PCE) of 7.98%, while the cells with Nb/Co−N−C and Bi/Co−N−C CE catalysts attained PCEs of 7.46 and 7.65%, respectively, much enhanced than that of the Pt-based photovoltaic cell (7.10%). This robust behavior was mainly attributed to the synergistic effect between the bimetallic active sites (Nb/Co, Bi/Co, and Mo/Co) and the nitrogen-doped carbon network, which resulted in a pronounced decrease in the charge-transfer resistance and superior device stability. Furthermore, the catalytic mechanism of these catalysts was investigated by the general strategy based on the surface adsorption of iodine atoms with the CE, work function, and electronic structure of the as-prepared nanohybrids, using first-principles density functional theory. The calculated adsorption energy and bond lengths were −0.82 eV and 3.05 Å for Co−N−C, −0.91 eV and 3.22 Å for Nb/Co−N−C, −1.00 eV and 3.28 Å for Bi/ Co−N−C, and −1.20 eV and 3.46 Å for Mo/Co−N−C, respectively. The density-of-states calculation predicted the metallic behavior of the as-prepared samples, and Bader charge analysis revealed that the development of uneven potential on the material surfaces with the addition of transition metals increases their polarities and the ability to adsorb I 3 − ions on the CE surface, which enhances the credibility of these catalysts. In addition, the enhanced value of the calculated work function also indicates their superior catalytic behavior and fast electron transfer mechanism for the triiodide reduction reaction. This work opens an era for the rational design of incorporated transition-metal/Co electrocatalysts with nitrogen-doped carbon networks for advanced energy devices in catalytic fields.

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“…To develop such a catalyst, Zhang et al 44 synthesized MOF‐derived cobalt nanoparticles on N‐doped carbon (C‐MOF‐C2) catalyst for effective catalysis of OER. The produced catalyst showed a small onset potential of 1.50 V and reached the current density of 10 mA/cm 2 with 1.58 V. In another study, Nath et al 62 synthesized MOF‐templated Co nanoparticles inserted in N‐doped porous carbon (Co@NPC) for an OER electrocatalyst. A synergistic effect of Co nanoparticles and the N‐doped carbon makes Co@NPC electroactive towards OER with remarkable performance, stability, and durability.…”

Section: Monometallic Mofs As An Oer Electrocatalyst Precursormentioning

confidence: 99%

Metal‐organic frameworks‐derived novel nanostructured electrocatalysts for oxygen evolution reaction

2020

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Engineering cost‐effective catalysts with exceptional performance for the electrochemical oxygen evolution reaction (OER) remains crucial for the accelerated development of renewable energy techniques, and especially so, given the pivotal role of OER in water electrolysis. On the basis of the metal nodes (clusters) and organic linkers, metal‐organic frameworks (MOFs) and their derivatives are rapidly gaining ground in the fabrication of electrocatalysts, with promising catalytic activity and sound durability in OER, thanks to their controllable pore structures, abundant unsaturated active sites of metal ion, extensive specific surface area, as well as easily functionalized/modified surfaces. This review presents an in‐depth understanding of the established progress of MOFs‐derived materials for OER electrocatalysis. The material designing strategies of the pristine, monometallic, and multimetallic MOFs‐based catalysts are summarized to indicate the infinite possibilities of the morphology and the composition of MOF‐derived materials. While emphasis is laid on the essential features of MOF‐derived materials for the electrocatalysis of the corresponding reactions, insights about the applications in OER are discussed. Finally, this paper is concluded by presenting challenges and perspectives for MOF‐derived materials’ future applications in OER electrocatalysis.

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MOF-templated cobalt nanoparticles embedded in nitrogen-doped porous carbon: a bifunctional electrocatalyst for overall water splitting

Abstract: A carboxylate based 3D-anionic MOF-derived bifunctional electrocatalyst was fabricated for overall water splitting through a one-pot carbonization technique.

Cited by 27 publications

References 70 publications

Metal–Organic Frameworks and Metal–Organic Framework-Derived N-Doped Porous Carbon Materials as Heterogeneous Catalysts: Chemical Fixation of Carbon Dioxide under Mild Conditions and Electrochemical Hydrogen Evolution

Metal–Organic Frameworks and Metal–Organic Framework-Derived N-Doped Porous Carbon Materials as Heterogeneous Catalysts: Chemical Fixation of Carbon Dioxide under Mild Conditions and Electrochemical Hydrogen Evolution

Cobalt-Based Incorporated Metals in Metal–Organic Framework-Derived Nitrogen-Doped Carbon as a Robust Catalyst for Triiodide Reduction in Photovoltaics

Metal‐organic frameworks‐derived novel nanostructured electrocatalysts for oxygen evolution reaction

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