Strategic design of Fe and N co-doped hierarchically porous carbon as superior ORR catalyst: from the perspective of nanoarchitectonics

Kim, Minjun; Firestein, Konstantin L.; Fernando, Joseph F. S.; Xu, Xingtao; Lim, Hyunsoo; Golberg, Dmitri; Na, Jongbeom; Kim, Jihyun; Nara, Hiroki; Tang, Jing; Yamauchi, Yusuke

doi:10.1039/d2sc02726g

Cited by 146 publications

(122 citation statements)

References 62 publications

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“…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. 11,12 Consequently, hollow carbon materials generally demonstrate high rate capabilities in energy storage applications.…”

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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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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“…The self-assembly of MOF was achieved through the delicate balance between the intermolecular π–π conjugate and coordination bonding. , For the MWNT/MOF@CF surface, the MWNT substrate had an increased number of nucleation sites to promote the connection and interpenetration of MOF, in which the carboxyl group of MWNT drove the oriented diversion of metal ions to the substrate by the coordination effect and graphite structure of MWNT, being conducive to the intermolecular π–π stacking of NDI ligands (Figure (d)) . Therefore, the hierarchical assembly of the MWNT/MOF hybrid structure was obtained by the dual nucleation effect of MWNT and the MOF crystal seed. − …”

Section: Resultsmentioning

confidence: 99%

Enhancing Interfacial and Electromagnetic Interference Shielding Properties of Carbon Fiber Composites via the Hierarchical Assembly of the MWNT/MOF Interphase

Sun

Yang

et al. 2022

Langmuir

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A metal–organic framework (MOF) based on a conjugated organic ligand and a transition-metal ion was designed and used to construct a novel multiwalled carbon nanotube (MWNT)/MOF interphase via hierarchical assembly on the carbon fiber (CF) surface and was compared to various interphases established by MWNT and MOF. An intertwined MWNT and MOF “jujube core” was randomly dispersed on MWNT@CF and MOF@CF surfaces, while interpenetrating structures with the MWNT network and MOF jujube core were simultaneously observed on MWNT/MOF@CF due to coordination bonds and π–π conjugation effects, which were derived from the MWNT template with carboxyl groups and sp2-hybridized domains as well as the secondary growth of MOF to promote self-assembly and the connection of MOF. The transverse fiber bundle test (TFBT) strength and interfacial shear strength (IFSS) of the MWNT/MOF@CF composite were 36.9, 6.1, and 20.8%, 16.3% higher than those of MWNT@CF and MOF@CF composites, which were attributed to the smoothed modulus transition of the stiffening interphase formed by the MWNT/MOF hybrid structure as “armor” to effectively buffer the stress transfer between a carbon fiber and the resin matrix. Compared to MWNT@CF and MOF@CF composites, MWNT/MOF@CF composites had the highest EMI shielding effectiveness, which was attributed to the combined effects of multiple reflections, conductive loss, and interface polarization from the interpenetrating MWNT/MOF hybrid structures, which realized the integration of the structure and function of the carbon fiber composites.

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“…In the present work, the therapeutic effects of NO and DFO were integrated into a single nanoplatform for highly efficient treatment of bacteria-infected wounds. The mesoporous polydopamine (mPDA) nanoparticle is a type of functional porous material that is now being widely used in many biomedical applications due to its excellent biocompatibility, biodegradability, tunable porous size, photothermal effect, and easy surface functionalization. ,− Therefore, mPDA was used as the photothermal agent and the carrier for efficient DFO delivery; a chitosan- graft -third generation poly(amidoamine) polymer with terminal S -nitrosothiol groups (CP-SNO) was designed and used as the NO-releasing material. After DFO loading, the as-prepared mPDA@DFO was further functionalized by CP-SNO via a strong electrostatic interaction, obtaining a multifunctional nanocomposite mPDA@DFO@CP-SNO.…”

Section: Introductionmentioning

confidence: 99%

Mild-Temperature Photothermal Effect Triggers Simultaneous Nitric Oxide- and Deferoxamine-Releasing Mesoporous Polydopamine-Based Nanoplatform for Robust Antibacterial, Anti-inflammation, and Wound-Healing Activity

et al. 2022

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Currently, treatment of chronically infected wounds still remains a big challenge; thus, a novel strategy with a highly efficient therapeutic effect is of urgent demand. In the present work, we demonstrated that combinational use of nitric oxide (NO) and deferoxamine (DFO) is a promising way for treating hard-to-heal wounds. As a proof of concept, DFO was first loaded in mesoporous polydopamine (mPDA) and then functionalized by a chitosan-graft-third generation poly(amidoamine) polymer with terminal S-nitrosothiol groups (CP-SNO) via a strong electrostatic interaction, obtaining a multifunctional nanocomposite mPDA@DFO@CP-SNO. Upon near-infrared laser irradiation, mPDA@DFO@CP-SNO displayed a mild-temperature photothermal effect (MPTT) and a simultaneous NO and DFO controlled release property. The synergistic MPTT and NO antibacterial effect of mPDA@DFO@CP-SNO enabled effective elimination of both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus (S. aureus), as well as the biofilms formed by both bacteria. An in-depth mechanistic study revealed that mPDA@DFO@CP-SNO possessed particular binding affinity to the bacterial membrane, which significantly enhanced the damage effect on the bacterial membrane followed by boosting intracellular reactive oxygen species generation to accelerate GSH depletion and DNA dysfunction, finally leading to bacterial death. Moreover, the anti-inflammation and wound-healing effectiveness of mPDA@DFO@CP-SNO were demonstrated on an in vitro cell scratch model and an in vivo S. aureus-infected rat full-thickness skin wound model. Thanks to the triple therapeutic effects of MPTT, DFO, and NO, mPDA@DFO@CP-SNO significantly relieved the inflammation in rats’ infected wounds and promoted wound skin regeneration by upregulating expression of the hypoxia-inducible factor (HIF)-1α and the vascular endothelial growth factor.

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Strategic design of Fe and N co-doped hierarchically porous carbon as superior ORR catalyst: from the perspective of nanoarchitectonics

Abstract: This study elucidates the role of each class of nanopore by in-depth electrochemical analysis of three types of ZIF-8-derived carbons. Also, engineered co-doping of Fe and N is found essential to selectively form Fe–Nx sites in the carbon matrix.

Cited by 146 publications

References 62 publications

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

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

Enhancing Interfacial and Electromagnetic Interference Shielding Properties of Carbon Fiber Composites via the Hierarchical Assembly of the MWNT/MOF Interphase

Mild-Temperature Photothermal Effect Triggers Simultaneous Nitric Oxide- and Deferoxamine-Releasing Mesoporous Polydopamine-Based Nanoplatform for Robust Antibacterial, Anti-inflammation, and Wound-Healing Activity

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