Boron-doped graphene as active electrocatalyst for oxygen reduction reaction at a fuel-cell cathode

Fazio, Gianluca; Ferrighi, Lara; Valentin, Cristiana Di

doi:10.1016/j.jcat.2014.07.024

Cited by 153 publications

(88 citation statements)

References 35 publications

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“…These angles translate to an interlayer distance of 0.35 nm and 0.33 nm for rGONS and rSDGONS respectively. The decrease in the interlayer distances observed upon doping can be attributed to effective π‐π interactions upon inclusion of an electron rich sulphur element .…”

Section: Resultsmentioning

confidence: 67%

Electrocatalytic Activity of Nanocomposites of Sulphur Doped Graphene Oxide and Nanosized Cobalt Phthalocyanines

Shumba

Nyokong

2016

Electroanalysis

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In this work we explore the electrocatalytic activity of nanocomposites of reduced sulphur doped graphene oxide nanosheets (rSDGONS) and cobalt phthalocyanine (CoPc) or cobalt tetra amino phthalocyanine (CoTAPc) towards hydrogen peroxide. Transmission electron microscopy, scanning electron microscopy, X‐ray photon spectroscopy, X‐ray diffraction, chronoamperometry, linear scan voltammetry and cyclic voltammetry were used to characterize the nanocomposites. Nanosized CoPc showed superior (in terms of currents) electrocatalytic oxidation and reduction of hydrogen peroxide compared to CoTAPc nanoparticles (CoTAPcNP). The lowest detection limit was obtained for hydrogen peroxide oxidation on electrodes modified with CoPcNP‐rSDGONS at 1.49 µM. The same electrode gave a high adsorption equilibrium constant of 1.27×103 mol−1 and a Gibbs free energy of −17.71 kJ/mol, indicative of a spontaneous reaction on the electrode surface.

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Section: Resultsmentioning

confidence: 67%

Electrocatalytic Activity of Nanocomposites of Sulphur Doped Graphene Oxide and Nanosized Cobalt Phthalocyanines

Shumba

Nyokong

2016

Electroanalysis

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“…Based on a model graphene nanoflake structure (circumcoronene), Fazio et al 238 used real-space B3LYP calculations with modest basis sets. Minima and true transition states (identified by diagonalisation of the Hessian matrix) were located on the ORR path for both associative and dissociative pathways, considering both the Eley-Rideal and Langmuir-Hinschelwood mechanisms.…”

Section: Fuel Cellsmentioning

confidence: 99%

Computational chemistry for graphene-based energy applications: progress and challenges

Hughes

Walsh

2015

Nanoscale

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Citation: Hughes ZE and Walsh TR (2015) Computational chemistry for graphene-based energy applications: progress and challenges. Nanoscale. 7: 6883-6908. Research in graphene-based energy materials is a rapidly growing area. Many graphene-based energy applications involve interfacial processes. To enable advances in the design of these energy materials, such that their operation, economy, efficiency and durability is at least comparable with fossil-fuel based alternatives, connections between the molecular-scale structure and function of these interfaces are needed. While it is experimentally challenging to resolve this interfacial structure, molecular simulation and computational chemistry can help bridge these gaps. In this Review, we summarise recent progress in the application of computational chemistry to graphene-based materials for fuel cells, batteries and photovoltaics. We also outline both the bright prospects and emerging challenges these techniques face for application to graphene-based energy materials in future.

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“…78,83 These are the indication of ORR at the cathode to determine cell performance, cost and durability. 228,229 Specifically, Xia group 55 reported a catalyst-free BG with the B content of 3.2 %, which exhibited a one-step process for ORR with an onset potential at -0.05 V, long-term stability in alkaline electrolytes, and good tolerance to methanol and CO (Figure 8a- due to a synergetic effect arising from the N and B co-doping. 228,229 Specifically, Xia group 55 reported a catalyst-free BG with the B content of 3.2 %, which exhibited a one-step process for ORR with an onset potential at -0.05 V, long-term stability in alkaline electrolytes, and good tolerance to methanol and CO (Figure 8a- due to a synergetic effect arising from the N and B co-doping.…”

Section: Electrocatalysismentioning

confidence: 99%

Heteroatom substituted and decorated graphene: preparation and applications

Chen

Huang

2015

Phys. Chem. Chem. Phys.

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Graphenes have attracted increasing attention in a variety of scientific fields. By modification with foreign elements such as boron, sulfur, and fluorine, their unique electronic and spin structures can be effectively tuned and the substituted or decorated graphenes as promising materials have been successfully employed in electrical, optical, and catalytic fields. In this review, we summarize the recent advances of these newly derived heteroatom substituted or decorated graphenes with an emphasis on the preparation methods, applications and the mechanisms of action. We are hopeful for future developments of heteroatom substituted or decorated graphenes in precisely controlled substitution methods, and finding wide applications of heteroatom substituted or decorated graphenes in many different fields.

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Boron-doped graphene as active electrocatalyst for oxygen reduction reaction at a fuel-cell cathode

Abstract: Boron-doped graphene was reported to be the best non-metal doped graphene electrocatalyst for the oxygen reduction reaction (ORR) working at an onset potential of 0.035 V [JACS 136 (2014)

Cited by 153 publications

References 35 publications

Electrocatalytic Activity of Nanocomposites of Sulphur Doped Graphene Oxide and Nanosized Cobalt Phthalocyanines

Electrocatalytic Activity of Nanocomposites of Sulphur Doped Graphene Oxide and Nanosized Cobalt Phthalocyanines

Computational chemistry for graphene-based energy applications: progress and challenges

Heteroatom substituted and decorated graphene: preparation and applications

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