Porous boron doped diamonds as metal-free catalysts for the oxygen reduction reaction in alkaline solution

Suo, Ni; Huang, Hao; Wu, Aimin; Hou, Xiuli; Zhang, Guifeng

doi:10.1016/j.apsusc.2017.12.198

Cited by 26 publications

(11 citation statements)

References 27 publications

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“…A certain amount of boron atoms can be successfully incorporated into the crystal lattice of diamonds and thus influence the catalytic activity. 189 Additionally, the incorporation of P into OLC was studied in an effort to promote the catalytic performance in the ORR and to adjust the electronic structure of the carbon network. 190 Different phosphorus chemical states were investigated, and C-O-P bonds were proven to be responsible for the enhanced activity.…”

Section: Electrochemical Reactionsmentioning

confidence: 99%

Catalysis by hybrid sp²/sp³nanodiamonds and their role in the design of advanced nanocarbon materials

et al. 2018

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Section: Electrochemical Reactionsmentioning

confidence: 99%

Catalysis by hybrid sp²/sp³nanodiamonds and their role in the design of advanced nanocarbon materials

et al. 2018

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“…This difference indicated that the order of graphitic structure in sample B–C was lower than the one in sample C due to doping effect of boron in B–C. Raman measurements of B–C and C presented in Figure b also reflected there were more defects in B–C than in sample C. Two characteristic peaks corresponding to the well-defined D (∼1333 cm –1 ) and G (∼1600 cm –1 ) bands could be clearly observed for sample B–C and C. However, the intensity ratio of the D band to G band ( I D / I G ) increased from 1.05 for sample C to 1.10 for sample B–C, suggesting that the structural disorder of B–C increases because of doping of B atoms . Nitrogen adsorption–desorption isotherms presented in Figure c demonstrate that materials B–C and C both possess micro- and mesoporous structure.…”

Section: Resultsmentioning

confidence: 88%

Synergetic Effect of B and O Dopants for Aerobic Oxidative Coupling of Amines to Imines

Zhai

Chu

Xie

et al. 2018

ACS Sustainable Chem. Eng.

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Boron-doped mesoporous carbon material (B–C) was fabricated by annealing boric acid and sustainable cellulose at high temperature in inert atmosphere. This heteroatom-doped carbon exhibited excellent catalytic activity and high selectivity in the oxidative coupling of amine to imines. Owing to the recyclable utilization of boric acid involved in the preparation of B–C and a kind of earth abundant natural biomass being the carbon source, this metal-free carbon catalyst could be regarded as a kind of green and sustainable catalyst. Characterizations, such as X-ray photoelectron spectroscopy and X-ray absorption near edge structure, demonstrated that boron mainly existed in the form of CBO2 and functioned as catalytic active site. A proposed catalytic mechanism based on density functional theory calculations pointed out that synergistic effect of B and O atoms in CBO2 promoted adsorption and dehydrogenation of benzylamine. The intermediators, such as hydrogen peroxide, ammonia, and phenylmethanimine, could be captured by hexamethyldisilazane, indicating rationality of the proposed mechanism. This study not only developed a new catalytic system for the transformation of amine to imine, but also broadened the application of B-doped carbon materials.

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“…Corresponding to Raman spectrum, 340 and 342 nm peaks appear for nitrogen-doped, verifying the existence of diamond and graphite phase one more time, respectively. Besides, we also reveal undoped polycrystal diamond fluorescence properties for contrast, which is illustrated in Figure 3 d. A PL peak at 737 nm is attributed to Si–V defect [ 40 ]. Few other specific peaks appear except for 340 nm (diamond phase), 342 nm (graphite phase), and 737 nm (Si–V defect).…”

Section: Resultsmentioning

confidence: 93%

Visible-Light Activation of Photocatalytic for Reduction of Nitrogen to Ammonia by Introducing Impurity Defect Levels into Nanocrystalline Diamond

Liu

Abbasi

et al. 2020

Materials

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Nitrogen impurity has been introduced in diamond film to produce a nitrogen vacancy center (NV center) toward the solvated electron-initiated reduction of N2 to NH3 in liquids, giving rise to extend the wavelength region beyond the diamond’s band. Scanning electron microscopy and X-ray diffraction demonstrate the formation of the nanocrystalline nitrogen-doped diamond with an average diameter of ten nanometers. Raman spectroscopy and PhotoLuminescence (PL) spectrum show characteristics of the NV0 and NV− charge states. Measurements of photocatalytic activity using supraband (λ < 225 nm) gap and sub-band gap (λ > 225 nm) excitation show the nitrogen-doped diamond significantly enhanced the ability to reduce N2 to NH3 compared to the polycrystalline diamond and single crystal diamond (SCD). Our results suggest an important process of internal photoemission, in which electrons are excited from negative charge states into conduction band edges, presenting remarkable photoinitiated electrons under ultraviolet and visible light. Other factors, including transitions between defect levels and processes of reaction, are also discussed. This approach can be especially advantageous to such as N2 and CO2 that bind only weakly to most surfaces and high energy conditions.

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Porous boron doped diamonds as metal-free catalysts for the oxygen reduction reaction in alkaline solution

Cited by 26 publications

References 27 publications

Catalysis by hybrid sp²/sp³nanodiamonds and their role in the design of advanced nanocarbon materials

Catalysis by hybrid sp²/sp³nanodiamonds and their role in the design of advanced nanocarbon materials

Synergetic Effect of B and O Dopants for Aerobic Oxidative Coupling of Amines to Imines

Visible-Light Activation of Photocatalytic for Reduction of Nitrogen to Ammonia by Introducing Impurity Defect Levels into Nanocrystalline Diamond

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Porous boron doped diamonds as metal-free catalysts for the oxygen reduction reaction in alkaline solution

Cited by 26 publications

References 27 publications

Catalysis by hybrid sp2/sp3nanodiamonds and their role in the design of advanced nanocarbon materials

Catalysis by hybrid sp2/sp3nanodiamonds and their role in the design of advanced nanocarbon materials

Synergetic Effect of B and O Dopants for Aerobic Oxidative Coupling of Amines to Imines

Visible-Light Activation of Photocatalytic for Reduction of Nitrogen to Ammonia by Introducing Impurity Defect Levels into Nanocrystalline Diamond

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Catalysis by hybrid sp²/sp³nanodiamonds and their role in the design of advanced nanocarbon materials

Catalysis by hybrid sp²/sp³nanodiamonds and their role in the design of advanced nanocarbon materials