Synthesis of nitrogen-doped graphyne/iron catalysts via γ-ray irradiation and their properties

Yingjie DONG; Haiting SHI; Shuo WANG; Chunying MIN; Daoxi WANG; Ruiqi SHAO; Zhiwei XU

doi:10.11889/j.1000-3436.2023-0075

Journals >Journal of Radiation Research and Radiation Processing >Volume 42 >Issue 1 >Page 010201 > Article

Journal of Radiation Research and Radiation Processing
Vol. 42, Issue 1, 010201 (2024)

Synthesis of nitrogen-doped graphyne/iron catalysts via γ-ray irradiation and their properties

Yingjie DONG¹, Haiting SHI^1、*, Shuo WANG¹, Chunying MIN², Daoxi WANG¹, Ruiqi SHAO¹, and Zhiwei XU^1、**

Author Affiliations

¹School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China

²School of Polymer Materials Research, College of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

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DOI: 10.11889/j.1000-3436.2023-0075 Cite this Article

Yingjie DONG, Haiting SHI, Shuo WANG, Chunying MIN, Daoxi WANG, Ruiqi SHAO, Zhiwei XU. Synthesis of nitrogen-doped graphyne/iron catalysts via γ-ray irradiation and their properties[J]. Journal of Radiation Research and Radiation Processing, 2024, 42(1): 010201 Copy Citation Text

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(a) Flow chart of NGY-Fe catalyst preparation; (b) SEM image and (c) TEM image of NGY-Fe sample prepared after γ irradiation; (d) elemental distribution (C, N and Fe) plots of NGY-Fe samples obtained by SEM's built-in EDS

Fig. 1. (a) Flow chart of NGY-Fe catalyst preparation; (b) SEM image and (c) TEM image of NGY-Fe sample prepared after γ irradiation; (d) elemental distribution (C, N and Fe) plots of NGY-Fe samples obtained by SEM's built-in EDS

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(a) High-resolution core-grade XPS full spectra of NGY-Fe samples and GY samples after γ irradiation; (b) Raman spectra of NGY-Fe samples; high-resolution core-level XPS peak splitting spectra of (c) C1s, (d) Fe2p and (e) N1s

Fig. 2. (a) High-resolution core-grade XPS full spectra of NGY-Fe samples and GY samples after γ irradiation; (b) Raman spectra of NGY-Fe samples; high-resolution core-level XPS peak splitting spectra of (c) C1s, (d) Fe2p and (e) N1s

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Fig. 3. (a) Cyclic voltammetry curves of NGY-Fe catalysts and commercial Pt/C catalysts in 0.1 mol/L KOH electrolyte; (b) polarisation curves of NGY-Fe catalyst and commercial Pt/C catalyst at 1 600 r/min (color online)

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Fig. 4. (a) LSV curves of the optimal sample NGY-Fe_1/2 at different rotational speeds; (b) K-L curves corresponding to the optimal sample NGY-Fe_1/2 at different potentials; (c) nyquist plots of samples NGY-Fe_1/2 and commercial Pt/C catalyst (color online)

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Fig. 5. Number of (a) transferred electrons (n) of samples NGY-Fe_1/2 and commercial Pt/C catalysts obtained according to RRDE experimental tests; (b) H₂O₂ yield during oxygen reduction reaction

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Fig. 6. Tafel slope calculated based on the polarization data of oxygen reduction reaction of NGY-Fe_1/2 catalyst and Pt/C catalyst

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Fig. 7. (a) I-t curves of NGY-Fe_1/2 catalyst and Pt/C catalyst; (b) Methanol tolerance curves for NGY-Fe_1/2 catalyst and Pt/C catalyst

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催化剂 Catalysts

Graphyne

NGY-Fe_1/2

Fe_1/2-N-graphyne

Pt/C

比表面积 / (m²·g^-1)

Specific surface area

230.7

411.3

391.8

182.5

孔径 / nm

Pore size

3.8

8.3

6.0

3.4

Table 1. Structural properties of the prepared catalysts and commercial Pt/C catalysts

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催化剂 Catalysts	起始电位 / V Starting potential	半波电位 / V Half-wave potential	极限电流密度 / (mA∙cm^-2) Limiting current density	循环伏安测试峰值电位 / V Cyclic voltammetry peak potential
Pt/C	0.932	0.771	5.21	0.767
Graphyne	0.733	0.500	2.49	0.582
Fe_1/2-N-graphyne	0.964	0.763	5.14	0.719
NGY-Fe_1/3	0.825	0.611	3.67	0.777
NGY-Fe_1/2	0.903	0.782	5.32	0.787
NGY-Fe_2/3	0.815	0.694	4.72	0.782
NGY-Fe_4/5	0.891	0.701	5.38	0.761
NGY-Fe_1/1	0.887	0.689	4.65	0.773

Table 2. Oxygen reduction catalytic activity of prepared NGY-Fe catalysts and commercial Pt/C catalysts

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