Synergistic effect of boron/nitrogen co-doping into graphene and intercalation of carbon black for Pt-BCN-Gr/CB hybrid catalyst on cell performance of polymer electrolyte membrane fuel cell

Lee, W.H.; Yang, Haoran; Park, K.W.; Choi, Byung-Uk; Yi, Sung Chul; Kim, W.J.

doi:10.1016/j.energy.2015.12.088

Cited by 36 publications

(9 citation statements)

References 54 publications

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“…More importantly, the high content of N species synergying with B‐doping can change the electronic structure of carbon material. [ 37,47 ] Figure 3k shows the schematic illustration of the electron‐deficient B and electron‐rich N feature of BN‐PC. The attached B‐containing groups have good hole‐donor characteristic and reinforce the hole‐transfer reactivity, while the attached N‐containing groups have good electron‐donor characteristic and high charge mobility.…”

Section: Resultsmentioning

confidence: 99%

“…Importanly, the introduction of nitrogen into the carbon lattice can produce high pseudocapacitance, while boron doping can arouse a shift of the Fermi level to the conducting band, resulting in a better conductivity of carbon materials. [ 36,37 ] Therefore, B and N co‐doping provides us a good chance to enhance the overall electrochemical performance of carbon materials by tuning reaction activity, electronic conductivity, and surface compatibility.…”

Section: Introductionmentioning

confidence: 99%

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Liquid‐State Templates for Constructing B, N, Co‐Doping Porous Carbons with a Boosting of Potassium‐Ion Storage Performance

Feng

Liu

et al. 2020

Advanced Energy Materials

123

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lithium resources greatly limits the large-scale promotion and application of LIBs. [4-7] As possible candidates, sodium and potassium ion systems are receiving intense attention owing to their low cost and high natural abundant resources. [8-14] Particularly, recent studies indicated that compared with sodium ions, potassium ions exhibited more merits on the basis of its similar intercalation behaviors in graphite and closer redox potential (K/K + , −2.92 V) with Li ions. [15,16] Therefore, potassium ion energy storage system, including potassium ion batteries (PIBs) and potassium ion hybrid capacitors (PIHCs) demonstrates a promising prospect in practical applications, and the corresponding studying upsurge is just beginning. [16,17] In the exploration of potassium electrode materials, porous carbons are highly preferable owing to their elastic framework, rich porosity and good conductivity, which can efficiently alleviate the volume expansion caused by the larger K + (ionic radius, 1.38 Å) intercalation and provides more pathways for fast K + diffusion. [16,18-21] So far, many carbons with various porosities have been successfully used in potassium ion system, exhibiting excellent electrochemical performance. [22,23] In current strategies of producing porous carbons, the template method is considered as one ideal way owing to its good control of porous architectures. [16] Presently, solid-phase templates including salts, SiO 2 nanospheres, and metal foams have been applied widely in constructing porous carbons. [24-26] Besides, gas-phase templates such as gas bubbles and foams are also popular due to their facile and economical process. [23,27] Despite a great process, several challenges still remain. For example, salt or gas-phase templates are simple and scalable, but always create large-size pores, giving rise to the severe decrease of the volumetric capacitance. [28] The nanosized solid-phase templates can lead to small-size pores, but are hindered by high cost and the probability of contamination from the removal process. [29] Therefore, the development of a scalable and green template strategy for the synthesis of carbons with rich nanosized porosity is important. Notably, in contrast to the success of solid-and gas-phase templates, liquid-state templates are rarely reported so far, which might be Template-assistant design and fabrication of porous carbon electrode materials has experienced great progress throughout the past decades and yielded lots of successes via various gas or solid state templates. Nevertheless, liquid-state templates are rather rare in preparing porous carbon materials to date. In this work, melting B 2 O 3 beads are used as both templates and a B dopant, leading to unique B, N co-doping hierarchically porous carbons containing a "bubble pool"-like skeleton built of interconnected carbon nanobubbles. Notably, an interesting amending effect of doped B atoms on the N-doped carbon network can be identified for the first time, which creates a "paddy field"-like hybrid microstructure wi...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Liquid‐State Templates for Constructing B, N, Co‐Doping Porous Carbons with a Boosting of Potassium‐Ion Storage Performance

Feng

Liu

et al. 2020

Advanced Energy Materials

123

View full text Add to dashboard Cite

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“…The hydrothermal treatment of reduced graphene oxide with boric acid and dicyandiamide (2 h at 600 °C) was studied by Lee et al . They reported that the ORR catalytic performance of Pt on a hybrid support made of the B/N co‐doped graphene (BCN−Gr) and carbon black (CB) could be tuned by adjusting the amount of intercalated CB (0–60 wt.%, Figure 2e) used [86] . The improved performance, with up to 50 wt.% CB in the hybrid support, was attributed to the facile mass transfer of the adsorbed O 2 molecules and/or *OOH radical on the Pt active sites.…”

Section: Applications Of B/n Co‐doped Graphene In Electrochemical Ene...mentioning

confidence: 99%

Co‐doping Graphene with B and N Heteroatoms for Application in Energy Conversion and Storage Devices

et al. 2022

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Graphene, as an important member of the twodimensional (2D) class of materials, has been used extensively in a large spectrum of applications due to its remarkable properties. In addition to its properties and its easy modulation through intentional doping with boron (B) and nitrogen (N) heteroatoms leads to the production of graphene derivatives that exhibits a comprehensive arsenal of fascinating properties. More importantly, the different electronegativities of boron and nitrogen heteroatoms bestows graphene with a variety of new and/or improved electromagnetic, catalytic, physicochemical, and optical properties. As a result, doped graphene derivatives have been explored in catalysis, biotechnology, sensors, water purification, and used in many other applications. Nonetheless, there is a shortage of data on the use of B/N co-doped graphene nanomaterials in renewable energy conversion and storage technology. Therefore, this article aims to provide an overview on the recent progress and future aspects of several key applications of B/N co-doped graphene nanomaterials in these areas of energy and storage.

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“…However, this has changed after the invention of highly conductive 2D graphene sheets [160][161][162][163]. Fuel cells mainly consist of 3 parts: anode, cathode and a separation membrane.…”

Section: Energy Conversionmentioning

confidence: 99%

Graphene and derivatives – Synthesis techniques, properties and their energy applications

Dasari

Nouri

Brabazon

et al. 2017

Energy

132

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Synergistic effect of boron/nitrogen co-doping into graphene and intercalation of carbon black for Pt-BCN-Gr/CB hybrid catalyst on cell performance of polymer electrolyte membrane fuel cell

Cited by 36 publications

References 54 publications

Liquid‐State Templates for Constructing B, N, Co‐Doping Porous Carbons with a Boosting of Potassium‐Ion Storage Performance

Liquid‐State Templates for Constructing B, N, Co‐Doping Porous Carbons with a Boosting of Potassium‐Ion Storage Performance

Co‐doping Graphene with B and N Heteroatoms for Application in Energy Conversion and Storage Devices

Graphene and derivatives – Synthesis techniques, properties and their energy applications

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