Fabrication of Mo2C nanoparticles on N-doped carbon nanosheets as high-performance electrocatalyst

Sun, Jingjing; Chen, Xiaojun; Mao, Ziyao; Liu, Bichan; Zhao, Ruihua; Du, Jianping

doi:10.1016/j.jallcom.2022.167931

Cited by 11 publications

(4 citation statements)

References 48 publications

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“…1597 cm À 1 correspond to the G-band and D-band of carbon, [34,35] respectively. The D-band and G-band represent the defect carbon and sp 2 -hybridized graphitic carbon in MOMC@C materials, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The characteristic peaks located at 662, 819 and 993 cm −1 can be attributed to the formation of molybdenum carbide, which is consistent with the XRD analysis. The other two characteristic peaks at 1356 and 1597 cm −1 correspond to the G‐band and D‐band of carbon, [34,35] respectively. The D‐band and G‐band represent the defect carbon and sp 2 ‐hybridized graphitic carbon in MOMC@C materials, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Phase Engineering of Molybdenum Carbide/Oxide for Highly‐Efficient Electrocatalytic Hydrogen Production

Gao

Chen

Zhao

et al. 2023

Chemistry An Asian Journal

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Molybdenum carbide is one of non‐precious metal materials and it is a promising electrocatalyst for hydrogen production. Synthesis and improvement of molybdenum carbide's catalytic performance is of great significance. Herein, carbon‐based Mo2C with hybrid phase of MoO2 was fabricated by matching the composition of Mo and C derived from pomelo peel and optimizing raw carbon amount and prolysis temperature. The resulting MoO2/Mo2C@C is composed of loose microspheres with mesoporous microstructure and is self‐assembled from nanoparticles. The results show that MoO2/Mo2C@C2 material exhibits excellent HER performance and only a low overpotentials of 143 mV is needed to drive the current density of 10 mA cm−2 in alkaline solution, and Tafel slopes are only 63.4 mV dec−1, respectively. Notably, it has potential application at low overpotentials to drive large current density and this strategy also provides a universal route to prepare non‐noble metal catalyst with hybrid phase of oxide/carbide.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Phase Engineering of Molybdenum Carbide/Oxide for Highly‐Efficient Electrocatalytic Hydrogen Production

Gao

Chen

Zhao

et al. 2023

Chemistry An Asian Journal

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“…The lattice size of 2D P,N,S-Mo 2 C is larger than pristine Mo 2 C. This is because the atomic radius of C is different from that of P, N, and S atoms, suggesting that various types of non-metallic heteroatoms have been successfully incorporated into the lattice of Mo 2 C. As shown in Supplementary Figure 5, the XRD data for samples subjected to one, two, and three microwave pulses clearly demonstrate the structural evolution of 2D P,N,S-Mo 2 C. After the first pulse, the XRD spectrum between 15° and 30° shows a broad diffraction peak, possibly due to the thermal decomposition of glucose resulting in a large amount of carbon. Following the second pulse, the XRD features are predominantly those of monoclinic MoO 2 (PDF: 01-076-1807) [44] . The formation of Mo 2 C single crystal phase is observed after the third pulse.…”

Section: Materials Preparation and Characterizationmentioning

confidence: 99%

Microwave-pulse assisted synthesis of tunable ternary-doped 2D molybdenum carbide for efficient hydrogen evolution

Fan,

Guo,

Fang

et al. 2024

Chem Synth

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Amidst the urgent demand for carbon-neutral strategies, electrocatalytic hydrogen evolution reaction (HER) has garnered significant attention as an efficient and environmentally friendly energy conversion pathway. Non-precious metal layered transition metal carbides, particularly various modified two-dimensional molybdenum carbides (2D Mo2C), have emerged as promising HER catalysts due to their superior intrinsic catalytic activity. While common non-metal doping strategies have been widely employed to enhance the electronic configuration and bulk/interface activity, the mechanism of HER performance dependence on the doping-induced electronic configuration in 2D Mo2C remains unclear, especially for more complex binary or ternary doping configurations. To address the issue of uncontrollable doping atom percentages in conventional methods, herein, we propose a strategy for rapidly synthesizing highly tunable non-metal multielement-doped 2D Mo2C using microwave pulse-assisted synthesis. By designing doping configurations with similar atomic ratios, we delve into the impact mechanisms of various doping configurations on the HER performance of 2D Mo2C, with phosphorus doping potentially exerting the most significant positive influence. Furthermore, leveraging the unique thermodynamic and kinetic advantages of microwaves, this approach efficiently prevents potential side reactions associated with multi-element doping, enabling the rapid and precise synthesis of binary and ternary-doped 2D Mo2C. The synthesized ternary-doped 2D Mo2C with the same doping atomic ratios (2D P,N,S-Mo2C) exhibits outstanding HER performance. This method not only offers a novel approach for precisely designing non-metallic atomic doping configurations in 2D TMCs but also provides insights into the theoretical structure-activity mechanism for other carbides with unique structures.

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“…Precious metals such as Pt-based materials have low Gibbs free energy and exhibit high electrocatalytic activity, 15,16 but their limited reserves and high cost hinder their large-scale application in industry. [17][18][19] Therefore, it is important to develop precious-metal-free materials for hydrogen production by electrolysis of water, such as Mo 2 C/C, 20 Co 2 C, 21 Mo-Ni-S, 22 Mo 2 C-Mo 2 N, 23 and Ni-Ni 3 C/C. 24 Molybdenum carbide as a transition metal carbide is a promising catalyst material possessing exceptional thermodynamic and electrochemical properties.…”

Section: Introductionmentioning

confidence: 99%

Engineering micro/nanostructures of Mo₂C/porous nanocarbon for enhanced hydrogen production

Liu

et al. 2023

New J. Chem.

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Fabrication of Mo2C nanoparticles on N-doped carbon nanosheets as high-performance electrocatalyst

Cited by 11 publications

References 48 publications

Phase Engineering of Molybdenum Carbide/Oxide for Highly‐Efficient Electrocatalytic Hydrogen Production

Phase Engineering of Molybdenum Carbide/Oxide for Highly‐Efficient Electrocatalytic Hydrogen Production

Microwave-pulse assisted synthesis of tunable ternary-doped 2D molybdenum carbide for efficient hydrogen evolution

Engineering micro/nanostructures of Mo₂C/porous nanocarbon for enhanced hydrogen production

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Fabrication of Mo2C nanoparticles on N-doped carbon nanosheets as high-performance electrocatalyst

Cited by 11 publications

References 48 publications

Phase Engineering of Molybdenum Carbide/Oxide for Highly‐Efficient Electrocatalytic Hydrogen Production

Phase Engineering of Molybdenum Carbide/Oxide for Highly‐Efficient Electrocatalytic Hydrogen Production

Microwave-pulse assisted synthesis of tunable ternary-doped 2D molybdenum carbide for efficient hydrogen evolution

Engineering micro/nanostructures of Mo2C/porous nanocarbon for enhanced hydrogen production

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Engineering micro/nanostructures of Mo₂C/porous nanocarbon for enhanced hydrogen production