Investigation on effect of boron and nitrogen substitution on electronic structure of graphene

Sharma, Ritu; Khan, S.; Goyal, Vipul; Sharma, Varshali; Sharma, Krishna S.

doi:10.1016/j.flatc.2016.10.001

Cited by 29 publications

(19 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The boron is electrophilic and induces a positive charge on the neighboring C atom when integrating with the carbon materials. It has been reported that the introduction of boron into graphene leads to develop of σ bonds by three valence electrons of boron with three electrons of the C atom from graphene [ 53 ]. Extra π-electrons present in the C can create a deficiency of electrons in the conduction band and produce a p-type character in the valence band.…”

Section: Functionalized Electrode Materials For Oermentioning

confidence: 99%

Recent Progress in the Development of Advanced Functionalized Electrodes for Oxygen Evolution Reaction: An Overview

Chen

Kalimuthu

Anushya³

et al. 2021

Materials

View full text Add to dashboard Cite

Presently, the global energy demand for increasing clean and green energy consumption lies in the development of low-cost, sustainable, economically viable and eco-friendly natured electrochemical conversion process, which is a significant advancement in different morphological types of advanced electrocatalysts to promote their electrocatalytic properties. Herein, we overviewed the recent advancements in oxygen evolution reactions (OERs), including easy electrode fabrication and significant action in water-splitting devices. To date, various synthetic approaches and modern characterization techniques have effectively been anticipated for upgraded OER activity. Moreover, the discussed electrode catalysts have emerged as the most hopeful constituents and received massive appreciation in OER with low overpotential and long-term cyclic stability. This review article broadly confers the recent progress research in OER, the general mechanistic approaches, challenges to enhance the catalytic performances and future directions for the scientific community.

show abstract

Section: Functionalized Electrode Materials For Oermentioning

confidence: 99%

Recent Progress in the Development of Advanced Functionalized Electrodes for Oxygen Evolution Reaction: An Overview

Chen

Kalimuthu

Anushya³

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“…The co‐doping of heteroatoms produces synergistic effects and create new properties. Heteroatoms such as boron and nitrogen have similar size but generate opposite doping effects . N, B co‐doped graphene can be achieved by using two precursors (nitrogen and boron precursors) or a precursor that contains both nitrogen and boron in its structure.…”

Section: Heteroatom‐doped Graphenementioning

confidence: 99%

“…Heteroatoms such as boron and nitrogen have similar size but generate opposite doping effects. 303 N, B co-doped graphene can be achieved by using two precursors (nitrogen and boron precursors) or a precursor that contains both nitrogen and boron in its structure. When they are simultaneously doped on graphene, they form boron nitride because of the phase separation between carbon and boron nitride.…”

Section: Co-doped Graphenementioning

confidence: 99%

Heteroatom-doped graphene and its application as a counter electrode in dye-sensitized solar cells

2018

View full text Add to dashboard Cite

Summary The most frequently used counter electrode (CE) in dye‐sensitized solar cells (DSSCs) is platinum on fluorine‐doped tin oxide glass. This electrode has excellent electrical conductivity, chemical stability, and high electrocatalytic affinity for the reduction of triiodide. However, the high cost of metallic platinum and the poor electrochemical stability pose a major drawback in the commercial production. This has necessitated a search for a non‐precious metal and metal‐free electrocatalyst that demonstrates better catalytic activity and longer electrochemical stability for practical use in DSSCs. Graphene has been at the centre of attention due to its excellent optoelectronic properties. However, a defect‐free graphene sheet is not suitable as a CE in DSSCs, because of its neutral polarity which often restricts efficient charge transfer at the graphene/liquid interface, irrespective of the high in‐plane charge mobility. Hence, heteroatom‐doped graphene‐based CEs are being developed with the aim to balance electrical conductivity for efficient charge transfer and charge polarization for enhanced reduction activity of redox couples simultaneously. The elements commonly used in chemical doping of graphene are nitrogen, oxygen, boron, sulfur, and phosphorus. Halogens have also recently shown great promise. It has been demonstrated that edge‐selective heteroatom‐doping of graphene imparts both efficient in‐plane charge transfers and polarity, thereby enhancing electrocatalytic activity. Thus, heteroatom‐doped graphene serves as a good material to replace conventional electrodes and enhance power conversion efficiency in DSSCs. The focus is to reduce the cost of DSSCs. This review explores the performance of DSSCs, factors that influence the power conversion efficiency, and various physicochemical properties of graphene. It further outlines current progress on the synthetic approaches for chemical doping (substitutional and surface transfer doping) of graphene and graphene oxide with different heteroatoms in order to fine‐tune the electronic properties. The use of heteroatom‐doped graphene as a CE in DSSCs and how it improves the photovoltaic performance of cells is discussed.

show abstract

“…Nonetheless, pure graphene with no band-gap displayed limited electro-catalytic activity due to the deficient number of active sites. The heteroatom doping can be used to open the band-gap and tune the Fermi level of graphene [ 18 , 19 ]. The doped carbonaceous materials are especially interesting as they are known to have better electro-catalytic activity in comparison to their un-doped equivalents [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of Nitrogen, Boron Co-Doped Graphene with Enhanced Electro-Catalytic Activity for Cymoxanil Detection

Varodi

Pogăcean

Coroș

et al. 2021

Sensors

View full text Add to dashboard Cite

A sample of nitrogen and boron co-doped graphene (NB-Gr) was obtained by the hydrothermal method using urea and boric acid as doping sources. According to XRD analysis, the NB-Gr sample was formed by five-layer graphene. In addition, the XPS analysis confirmed the nitrogen and boron co-doping of the graphene sample. After synthesis, the investigation of the electro-catalytic properties of the bare (GC) and graphene-modified electrode (NB-Gr/GC) towards cymoxanil detection (CYM) was performed. Significant differences between the two electrodes were noticed. In the first case (GC) the peak current modulus was small (1.12 × 10−5 A) and appeared in the region of negative potentials (−0.9 V). In contrast, when NB-Gr was present on top of the GC electrode it promoted the transfer of electrons, leading to a large peak current increase (1.65 × 10−5 A) and a positive shift of the peak potential (−0.75 V). The NB-Gr/GC electrode was also tested for its ability to detect cymoxanil from a commercial fungicide (CURZATE MANOX) by the standard addition method, giving a recovery of 99%.

show abstract

Investigation on effect of boron and nitrogen substitution on electronic structure of graphene

Cited by 29 publications

References 31 publications

Recent Progress in the Development of Advanced Functionalized Electrodes for Oxygen Evolution Reaction: An Overview

Recent Progress in the Development of Advanced Functionalized Electrodes for Oxygen Evolution Reaction: An Overview

Heteroatom-doped graphene and its application as a counter electrode in dye-sensitized solar cells

Hydrothermal Synthesis of Nitrogen, Boron Co-Doped Graphene with Enhanced Electro-Catalytic Activity for Cymoxanil Detection

Contact Info

Product

Resources

About