Hydrogen-dominated metal-free growth of graphitic-nitrogen doped graphene with n-type transport behaviors

Yang, Jie; He, Wanzhen; Jiang, Qianqing; Chen, Zhihui; Ju, Huanxin; Xue, Xudong; Xu, Zhiping; Hu, PingAn; Yu, Gui

doi:10.1016/j.carbon.2020.01.051

Cited by 17 publications

(15 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Typical signals of graphene were extracted from LIG: D band (1345 cm –1 ), G band (1576 cm –1 ), and 2D band (2690 cm –1 ). [ 29,30 ] The D peak reflects the defects in LIG, such as edges, heteroatoms, and boundaries. The intensity ratio of D and G peak ( I D / I G ) is calculated to be 0.54, indicating better quality than most GO and RGO.…”

Section: Resultsmentioning

confidence: 99%

Facile Fabrication of Robust and Reusable PDMS Supported Graphene Dry Electrodes for Wearable Electrocardiogram Monitoring

Yang

Zhang

et al. 2021

Adv Materials Technologies

Self Cite

View full text Add to dashboard Cite

Graphene‐based epidermal dry electrodes have generated wide interests in electrocardiography (ECG) monitoring to screen cardiovascular diseases in time. Nevertheless, the poor stability, mechanical strength, and integration are significant obstacles hindering further product marketing of graphene electrodes in health care. Herein, robust, reusable, and patterned graphene‐based wearable dry electrodes are fabricated based on laser writing technology and supported by polydimethylsiloxane (PDMS) layers. After bending tests over 10 000 cycles and high‐power ultrasonic treatments (5 h), graphene/PDMS electrodes are demonstrated to have excellent stability and reusability for ECG recording. Taking the advantages of the designable and efficient CO2 laser production technique, a “staff‐shape” graphene electrode consisting of six chest‐lead electrodes and corresponding lead lines can be facilely customized and fabricated according to users’ somatotype to greatly simplify the acquisition procedure of 12‐lead ECG, realizing the acquisition of V1–V6 ECGs for all‐round cardiac monitoring. After thorough analysis of ECG patterns, the integrated chest electrode exhibits desirable sensitivity and reliability comparable to wet Ag/AgCl electrodes. The reusable graphene/PDMS electrodes are suitable for long‐term ECG monitoring and the integrated electrode presents a novel strategy to wearable 12‐ECG recording.

show abstract

Section: Resultsmentioning

confidence: 99%

Facile Fabrication of Robust and Reusable PDMS Supported Graphene Dry Electrodes for Wearable Electrocardiogram Monitoring

Yang

Zhang

et al. 2021

Adv Materials Technologies

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, we also provide the high-resolution N 1 s XPS spectrum of N-CNF to further confirm the nitrogen doping. It is found that the N 1 s XPS spectrum can be deconvoluted into four peaks at 398.4, 400.0, 401.1 and 403.5 eV, corresponding to the pyridinic N, pyrrolic N, graphitic N and oxidized-N, respectively [ 48 , 49 , 50 , 51 ]. Among them, it is observed that the peak at 398.4 presents more strongly than other peaks, indicating that the nitrogen doping in N-CNF mainly constitutes pyridinic N. In addition, we also provide the nitrogen adsorption–desorption isotherms and pore size distributions of CNF and N-CNF, as shown in Figure S2 .…”

Section: Resultsmentioning

confidence: 99%

Ultra-Stable Potassium Ion Storage of Nitrogen-Doped Carbon Nanofiber Derived from Bacterial Cellulose

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

As a promising energy storage system, potassium (K) ion batteries (KIBs) have received extensive attention due to the abundance of potassium resource in the Earth’s crust and the similar properties of K to Li. However, the electrode always presents poor stability for K-ion storage due to the large radius of K-ions. In our work, we develop a nitrogen-doped carbon nanofiber (N-CNF) derived from bacterial cellulose by a simple pyrolysis process, which allows ultra-stable K-ion storage. Even at a large current density of 1 A g−1, our electrode exhibits a reversible specific capacity of 81 mAh g−1 after 3000 cycles for KIBs, with a capacity retention ratio of 71%. To investigate the electrochemical enhancement performance of our N-CNF, we provide the calculation results according to density functional theory, demonstrating that nitrogen doping in carbon is in favor of the K-ion adsorption during the potassiation process. This behavior will contribute to the enhancement of electrochemical performance for KIBs. In addition, our electrode exhibits a low voltage plateau during the potassiation–depotassiation process. To further evaluate this performance, we calculate the “relative energy density” for comparison. The results illustrate that our electrode presents a high “relative energy density”, indicating that our N-CNF is a promising anode material for KIBs.

show abstract

“…In this specific case, this C 1s spectrum can be fitted almost exclusively by a single peak at 284.4 eV with a full width at half-maximum (fwhm) of 0.8 eV, which is in very good agreement with the values corresponding to graphene in synchrotron and lab-based photoemission experiments. 13 , 52 , 53 Furthermore, a shift of the C 1s can be expected because of the N incorporation on the lattice and the interaction with the specific metallic substrate, but the largest contribution to this core response arises from the sp 2 -hybridized C atoms. Regarding the N incorporation into the lattice of N-graphene grown on the Cu(111) substrate, Figure 3 b,d shows the core level N 1s spectra where the components below 399 eV recorded straight after the molecular deposition correspond to the nitrilic and pyridinic bonding environments in agreement with the structure of the molecule.…”

Section: Resultsmentioning

confidence: 99%

“… 3 − 6 For instance, nitrogen-doped graphene (N-graphene) was first reported in 2009 from the pyrolysis of pyridine and ammonia in the arc discharge of graphite electrodes, 7 but later studies have optimized its growth with a wide scope of techniques. 8 − 13 Several applications of N-graphene have already been tested toward a new generation of batteries, 14 − 16 oxygen reduction, 17 hydrogen generation, 18 biosensors, 19 , 20 supercapacitors, 21 , 22 and quantum dots. 23 , 24 Ideally, the method used for the synthesis of graphene should be chosen according to the intended application.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exclusive Substitutional Nitrogen Doping on Graphene Decoupled from an Insulating Substrate

et al. 2020

View full text Add to dashboard Cite

The on-surface synthesis of atomically flat N-doped graphene on oxidized copper is presented. Besides circumventing the almost standard use of metallic substrates for growth, this method allows producing graphene with ∼2.0 at % N in a substitutional configuration directly decoupled from the substrate. Angle-resolved photoemission shows a linear energy-momentum dispersion where the Dirac point lies at the Fermi level. Additionally, the N functional centers can be selectively tailored in sp 2 substitutional configuration by making use of a purpose-made molecular precursor: dicyanopyrazophenanthroline (C 16 H 6 N 6 ).

show abstract

Hydrogen-dominated metal-free growth of graphitic-nitrogen doped graphene with n-type transport behaviors

Cited by 17 publications

References 66 publications

Facile Fabrication of Robust and Reusable PDMS Supported Graphene Dry Electrodes for Wearable Electrocardiogram Monitoring

Facile Fabrication of Robust and Reusable PDMS Supported Graphene Dry Electrodes for Wearable Electrocardiogram Monitoring

Ultra-Stable Potassium Ion Storage of Nitrogen-Doped Carbon Nanofiber Derived from Bacterial Cellulose

Exclusive Substitutional Nitrogen Doping on Graphene Decoupled from an Insulating Substrate

Contact Info

Product

Resources

About