MOF-derived nanoporous carbons with diverse tunable nanoarchitectures

Kim, Minjun; Xin, Ruijing; Earnshaw, Jacob; Tang, Jing; Hill, Jonathan P.; Ashok, Aditya; Kumar, Nanjundan Ashok; Kim, Jeonghun; Young, Christine; Sugahara, Yoshiyuki; Na, Jongbeom; Yamauchi, Yusuke

doi:10.1038/s41596-022-00718-2

Cited by 201 publications

(107 citation statements)

References 95 publications

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“…The analysis result of C 1s is in accordance with that of PXRD and Raman studies, indicating that ZIF-8-C is the amorphous carbon material with the coexistence of disordered and graphitized carbon structures. As for N 1s XPS (Figure c), the signal can be deconvoluted into three components with binding energies around 398.4, 399.5, and 400.7 eV, which may be attributed to pyridinic N, pyrrolic N, and graphitic N, respectively. , Overall, all of these results demonstrate that the N-doped porous carbon with high chemical stability to Fenton’s reagent has been successfully prepared through the pyrolysis of ZIF-8.…”

Section: Resultssupporting

confidence: 87%

“…As for N 1s XPS (Figure 4c), the signal can be deconvoluted into three components with binding energies around 398.4, 399.5, and 400.7 eV, which may be attributed to pyridinic N, pyrrolic N, and graphitic N, respectively. 42,43 Overall, all of these results demonstrate that the N-doped porous carbon with high chemical stability to Fenton's reagent has been successfully prepared through the pyrolysis of ZIF-8. XPS of PA@ZIF-8-C-64% showing the presence of a noticeable P 2p peak further confirms the impregnation of H 3 PO 4 (Figure S10c,d).…”

Section: ■ Introductionmentioning

confidence: 68%

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Metal–Organic Framework-Derived N-Doped Porous Carbon for a Superprotonic Conductor at above 100 °C

et al. 2022

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The development of proton conductors capable of working at above 100 °C is of great significance for proton exchange membrane electrolysis cells (PEMECs) and proton exchange membrane fuel cells (PEMFCs) but remains to be an enormous challenge to date. In this work, we demonstrate for the first time that the N-doped porous carbon derived from metal–organic frameworks (MOFs) with great superiority can be exploited for high-performing proton conductors at above 100 °C. Through the pyrolysis of ZIF-8, the N-doped porous carbon (ZIF-8-C) featuring high chemical resistance to Fenton’s reagent was readily prepared and then served as a robust host to accommodate H3PO4 molecules for proton transport. Upon impregnation with H3PO4, the resulting PA@ZIF-8-C exhibits low water swelling and high proton conduction of over 10–2 S cm–1 at a temperature above 100 °C, which is superior to many reported proton conductors. This work provides a new approach for the design of high-performing proton conductors at above 100 °C.

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Section: Resultssupporting

confidence: 87%

Section: ■ Introductionmentioning

confidence: 68%

Metal–Organic Framework-Derived N-Doped Porous Carbon for a Superprotonic Conductor at above 100 °C

et al. 2022

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“…4,6 Therefore, it is highly desirable to design and synthesize porous carbon materials with high specific surface area, tuned porosity, and abundant redox-active sites to facilitate both EDLC and pseudocapacitance to achieve high-performance supercapacitors. 7 , 8…”

Section: Introductionmentioning

confidence: 99%

“…4,6 Therefore, it is highly desirable to design and synthesize porous carbon materials with high specic surface area, tuned porosity, and abundant redox-active sites to facilitate both EDLC and pseudocapacitance to achieve high-performance supercapacitors. 7,8 While aiming for a high specic surface area with abundant heteroatom doping, the unique nanoarchitecture of porous carbon materials should be carefully considered to maximize the electrochemically accessible/active portion of the specic surface area. 9,10 For example, hollow carbon materials are known to promote ionic diffusion as their hollow cavities serve as reservoirs of electrolyte ions, hence shortening the required diffusion distance of ions.…”

Section: Introductionmentioning

confidence: 99%

Co, Fe and N co-doped 1D assembly of hollow carbon nanoboxes for high-performance supercapacitors

et al. 2022

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“…Nitrogen-doped carbon materials are a group of multifunctional materials produced by chemically bonding or incorporating nitrogen atoms into the backbone of carbon materials, such as graphene, carbon nanotubes (CNTs), , and porous carbon. − In view of their unique electronic and chemical properties, they have been widely involved and exploited in the electrochemistry and catalysis fields during the past decade. Due to the similar size of nitrogen atoms and carbon atoms, the skeleton structure of carbon materials is slightly damaged and can maintain stability in the process of nitrogen atoms replacing carbon atoms .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Performances of a Versatile Nitrogen-Doped Carbon Skeleton Material Derived from a Humate-CoFe-ZIF/Melamine Precursor

Yuan

Cong

et al. 2022

ACS Appl. Electron. Mater.

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Humic acid (HA), melamine, and ZIFs are superior precursors for preparing carbon materials. Especially, metal ions in ZIFs are excellent nanocatalysts for synthesizing CNTs or graphene, while melamine and ZIFs are good dopants for fabricating nitrogen-doped carbon materials. Here, nitrogendoped carbon skeletal materials (NCS) assembled by a large number of bamboo-like CNTs and a small number of graphene layers were elaborately synthesized by a two-step pyrolysis process using a humate-CoFe-ZIF (HA-CoFe-ZIF) composite material as the template and melamine as the carbon and nitrogen source. NCS-II exhibits desirable supercapacitive characteristics and superior support performance due to a harmoniously assembled graphitic structure, favorite nitrogen incorporation mainly including pyridinic N and pyrrolic N at a high dosage of 5.24 wt %, abundant mesoporous structure, and large specific surface. As a supercapacitor electrode material, NCS-II demonstrates a high electrochemical capacitance (324 F g −1 at 1 A g −1 ), wide operating current density range (1−50 A g −1 ), and rate capability (64% from 5 A g −1 to 50 A g −1 ). And the prepared NCS-II//AC asymmetric supercapacitor also displays a large specific capacitance (129 F g −1 at 1 A g −1 ), good cycling stability (96% at 5 A g −1 for 10 000 cycles), and high energy density (25.6 Wh kg −1 at 600 W kg −1 ). As a catalyst support, the NCS-II provides plentiful active sites and a large specific surface area for the highly dispersed loading of PtCo nanoparticles. The prepared 1:1-PtCo/NCS-II catalyst exhibits high catalytic activity, good cycling stability, and strong CO tolerance ability for methanol oxidation reaction (MOR). Its ECSA value, CV peak current density, and peak current retention after 500 CV turns are high, up to 265.7 m 2 g pt −1 , 850 mA mg Pt −1 , and 79%, respectively.

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MOF-derived nanoporous carbons with diverse tunable nanoarchitectures

Cited by 201 publications

References 95 publications

Metal–Organic Framework-Derived N-Doped Porous Carbon for a Superprotonic Conductor at above 100 °C

Metal–Organic Framework-Derived N-Doped Porous Carbon for a Superprotonic Conductor at above 100 °C

Co, Fe and N co-doped 1D assembly of hollow carbon nanoboxes for high-performance supercapacitors

Synthesis and Electrochemical Performances of a Versatile Nitrogen-Doped Carbon Skeleton Material Derived from a Humate-CoFe-ZIF/Melamine Precursor

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