Amorphous carbon having higher catalytic activity toward oxygen reduction reaction: Quinone and carboxy groups introduced onto its surface

Honda, Kensuke; Waki, Yuta; Matsumoto, Akari; Kondo, Bunta; Shimai, Yohsuke

doi:10.1016/j.diamond.2020.107900

Cited by 9 publications

(5 citation statements)

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“…On the other hand, for the electronics field, the possibility of applications has been reported of low-k materials for ULSI, solar cells, a dielectric insulating film for flash memory, resistive random-access memory (ReRAM), and a novel catalyst for fuel cells, etc. [89][90][91][92]. However, compared to its application as a hard coating film, it has not been used in many practical applications.…”

Section: Amorphous Carbon Nitridesmentioning

confidence: 99%

Selected Materials and Technologies for Electrical Energy Sector

et al. 2023

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Ensuring the energy transition in order to decrease CO2 and volatile organic compounds emissions and improve the efficiency of energy processes requires the development of advanced materials and technologies for the electrical energy sector. The article reviews superconducting materials, functional nanomaterials used in the power industry mainly due to their magnetic, electrical, optical, and dielectric properties and the thin layers of amorphous carbon nitride, which properties make them an important material from the point of view of environmental protection, optoelectronic, photovoltaic and energy storage. The superconductivity-based technologies, material processing, and thermal and nonthermal plasma generation have been reviewed as technologies that can be a solution to chosen problems in the electrical energy sector and environment. The study explains directly both—the basics and application potential of low and high-temperature superconductors as well as peculiarities of the related manufacturing technologies for Roebel cables, 1G and 2G HTS tapes, and superconductor coil systems. Among the superconducting materials, particular attention was paid to the magnesium di-boride MgB2 and its potential applications in the power industry. The benefits of the use of carbon films with amorphous structures in electronics, sensing technologies, solar cells, FETs, and memory devices were discussed. The article provides the information about most interesting, from the R&D point of view, groups of materials for PV applications. It summarises the advantages and disadvantages of their use regarding commercial requirements such as efficiency, lifetime, light absorption, impact on the environment, costs of production, and weather dependency. Silicon processing, inkjet printing, vacuum deposition, and evaporation technologies that allow obtaining improved and strengthened materials for solar cell manufacturing are also described. In the case of the widely developed plasma generation field, waste-to-hydrogen technology including both thermal and non-thermal plasma techniques has been discussed. The review aims to draw attention to the problems faced by the modern power industry and to encourage research in this area because many of these problems can only be solved within the framework of interdisciplinary and international cooperation.

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Section: Amorphous Carbon Nitridesmentioning

confidence: 99%

Selected Materials and Technologies for Electrical Energy Sector

et al. 2023

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“…Energy density (E cell ) and power density (P cell ) of the SCs were also calculated using Equation ( 9) and (10).…”

Section: Chemelectrochemmentioning

confidence: 99%

“…[8] Doping redox active materials in carbon materials allows the composite materials to undergo a reversible Faradaic electrochemical reaction, resulting in additional capacity. [9][10] The capacitance generated by the redox reaction is generally defined as redox capacity. [11][12][13] Despite such advantage, poor cycle stability and conductivity and high synthesis cost have limited the mass production of composite electrodes.…”

Section: Introductionmentioning

confidence: 99%

Novel Electrode Materials and Redox‐Active Electrolyte for High‐Performance Supercapacitor

Zhang

Kong

et al. 2022

ChemElectroChem

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Heteroatom doping has been increasingly applied to enhance the electrochemical performance of carbon materials when used as supercapacitor electrodes. However, the use of doped electrode by itself often does not provide sufficiently high performance for aqueous-based supercapacitor. Here, a highperformance supercapacitor was developed, using nitrogendoped microporous carbon spheres-based materials and a redox-active electrolyte as electrodes and electrolyte, respectively. The doped electrode, which was produced via template and self-assembly routes, exhibited a well-developed microporous structure, large specific surface area, and abundant heteroatoms. The combination of the heteroatom-doped electrode and KI-H 2 SO 4 electrolyte in supercapacitor substantially increased the specific capacitance, from 230 F g À 1 to 532 mAh g À 1 . Such a large enhancement was attributed to the addition of KI as a redox mediator in the aqueous electrolyte. The NCS-800 supercapacitor has a specific capacity as high as 68 mAh g À 1 (at a 1 A g À 1 current density) in KI-H 2 SO 4 electrolyte. It could retain 57 % of capacitance even after maintaining a constant voltage of 1 V for 5 hours, highlighting its good electrochemical performance of NCS-800 as a supercapacitor electrode material.

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“…[2,4] A clear conclusion on the best heteroatom(s), the atomic configuration of the dopant(s), and/or the defect-type in a graphitic carbon lattice for energy storage has not yet been achieved, because the related parameters are exclusively interdependent.In a complete contrast, very recently, the amorphous carbon-based materials have been reported to demonstrate attractive energy storage and conversion applications, such as in electrochemical batteries with high storage capacity and long-term stability, primarily owing to their disordered and defect-rich structures. [6][7][8][9][10][11][12][13][14][15] As such, it has been reported that the N-doped amorphous carbon sphere is more active for oxygen reduction reaction in 0.5 M H 2 SO 4 medium than their graphitic counterparts due to the fact that the micropores in amorphous carbon phase close down during graphitization process along with the decrease in N content. [14] Honda et al reported that the disordered sp 2 clusters in amorphous carbon or a mixed carbon state (sp 2 þ sp 3 C matrix) are more beneficial to electrocatalytic activities than pure graphitic carbons due to abundance in trapped charged centers.…”

mentioning

confidence: 99%

“…[14] Honda et al reported that the disordered sp 2 clusters in amorphous carbon or a mixed carbon state (sp 2 þ sp 3 C matrix) are more beneficial to electrocatalytic activities than pure graphitic carbons due to abundance in trapped charged centers. [13] Recently, CoO/Co-amorphous…”

mentioning

confidence: 99%

N,P‐Codoped, Low‐Density, Amorphous Carbon Foam for High‐Performance Supercapacitors: Polymer‐Based Scalable Production at Low Cost

Paul

Price

Roy

et al. 2021

Adv Energy and Sustain Res

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Advancement in the efficient energy storage is essential to keep up with the increasing demands in powering portable electronic gadgets and electric automobiles. [1,2] Carbon-based electrodes used in supercapacitors have remained fascinating means for efficient and environment-friendly electrochemical energy storage because of their Earth abundance, low cost, high specific surface area, and availability in easily tunable architectures and chemical states. [2,3] As compared with a pseudocapacitor where the charge is stored through fast Faradaic redox reactions, the electric double-layer capacitor (EDLC) stores charge at the interfaces through charge transfer between the electrolyte and the electrodes and, hence, provides faster charge-discharge cycling and specific capacitance of few orders of magnitude higher. [2] In the last decade, numerous carbon-based materials in various architectures have been utilized in EDLCs to achieve higher specific capacitance by increasing the specific surface area, crystallinity, conductivity, and density of electrochemically active sites. [1][2][3][4] Ideally, the well crystalline carbon-based allotropic nanomaterials, such as graphene, carbon nanotubes, and their hybrids in different 3D architectures, have so far been well studied for energy applications. [2][3][4][5] It has been recently observed that structural defects and heteroatom(s) doping into graphitic carbon lattices enhance their energy storage capability. [2,4] A clear conclusion on the best heteroatom(s), the atomic configuration of the dopant(s), and/or the defect-type in a graphitic carbon lattice for energy storage has not yet been achieved, because the related parameters are exclusively interdependent.In a complete contrast, very recently, the amorphous carbon-based materials have been reported to demonstrate attractive energy storage and conversion applications, such as in electrochemical batteries with high storage capacity and long-term stability, primarily owing to their disordered and defect-rich structures. [6][7][8][9][10][11][12][13][14][15] As such, it has been reported that the N-doped amorphous carbon sphere is more active for oxygen reduction reaction in 0.5 M H 2 SO 4 medium than their graphitic counterparts due to the fact that the micropores in amorphous carbon phase close down during graphitization process along with the decrease in N content. [14] Honda et al. reported that the disordered sp 2 clusters in amorphous carbon or a mixed carbon state (sp 2 þ sp 3 C matrix) are more beneficial to electrocatalytic activities than pure graphitic carbons due to abundance in trapped charged centers. [13] Recently, CoO/Co-amorphous

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Amorphous carbon having higher catalytic activity toward oxygen reduction reaction: Quinone and carboxy groups introduced onto its surface

Cited by 9 publications

References 50 publications

Selected Materials and Technologies for Electrical Energy Sector

Selected Materials and Technologies for Electrical Energy Sector

Novel Electrode Materials and Redox‐Active Electrolyte for High‐Performance Supercapacitor

N,P‐Codoped, Low‐Density, Amorphous Carbon Foam for High‐Performance Supercapacitors: Polymer‐Based Scalable Production at Low Cost

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