Effect of Co-Fe alloy nanoparticles on the surface electronic structure of molybdenum disulfide nanosheets and its application as a bifunctional catalyst for rechargeable zinc air battery

Shang, Xiaonan; Shen, Qiujie; Xiong, Yi; Jiang, Zhongqing; Qin, Chu; Tian, Xiaoning; Yuan, Xufeng; Jiang, Zhong‐Jie

doi:10.1016/j.jallcom.2022.165482

Cited by 13 publications

(6 citation statements)

References 41 publications

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“…Moreover, the Co−Fe/Ti 3 C 2 T X diffraction pattern shows shifted main peaks, indicating modified lattice spacing. This demonstrates the successful doping of Co [20] and Fe [21] into the Ti 3 C 2 T X lattice.A comparison with standard diffraction patterns (Fe: PDF#34‐0519, Co: PDF#05‐0727) confirms the successful loading of Fe and Co. Fe−Co/Ti 3 C 2 T X was further evaluated by XPS, as shown in Figure 2(d).The survey spectrum of this catalyst shows Fe 2p and Co 2p peaks, further confirming the successful addition of Fe and Co to Ti 3 C 2 T X .To explore the content of Fe and Co on the surface of Ti 3 C 2 T x , the catalyst was subjected to elemental energy spectroscopy under field emission scanning electron microscopy, in which Figure 3(a) shows the morphology of Fe−Co/ Ti 3 C 2 T X nanosheets, which can be seen that the morphology of the nanosheets is still maintained, but there is a stacking, which is due to the use of freeze–vacuum drying, where the nanosheets are adhered to each other by a vacuum environment, where the O, Fe, C Ti, and Co mass fractions were 35.28 wt %, 1.27 wt %, 18.98 wt %, 43.82 wt %, and 0.65 wt %, respectively.…”

Section: Resultsmentioning

confidence: 75%

Preparation and Study of Ti₃C₂T_x MXene–Deficient In Situ Anchored Fe−Co Alloy Nanoparticle Electrocatalyst for Hydrolysis and Hydrogenolysis

Zeng,

Liu,

Sun

et al. 2024

ChemistrySelect

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The novel two–dimensional MXene material Ti3C2Tx has the advantages of a large specific surface area, adjustable band gap, good electrical conductivity, and high stability. However, the precipitation of hydrogen via electrolytic water splitting over Ti3C2Tx has unacceptably slow kinetics. In this paper, Co nanoparticles were incorporated on the Ti3C2TxMXene surface via electrostatic adsorption by utilizing the intrinsic MXene defects generated during the etching process. Next, a Fe−Co alloy structure was also constructed on the Ti3C2TxMXenesurface by wet chemical impregnation method using the principle of galvanic coupling substitution. The prepared catalyst had an overpotential of 118 mV at a current density of 10 mA‐cm−2 and a Tafel slope of 97.56 mV dec−1. The Fe−Co alloy structure accelerated the kinetic hydrogen precipitation step, and Fe−Co/Ti3C2Txshowed excellent stability when used in a water electrolysis process for 11 h. This work offers a promising strategy for the synthesis of intrinsically defective synthetic alloy MXene structures.

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Section: Resultsmentioning

confidence: 75%

Preparation and Study of Ti₃C₂T_x MXene–Deficient In Situ Anchored Fe−Co Alloy Nanoparticle Electrocatalyst for Hydrolysis and Hydrogenolysis

Zeng,

Liu,

Sun

et al. 2024

ChemistrySelect

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“…For example, the electronic structure of the dual-function catalyst (NC@MoS 2 @Co-Fe) was optimized by the Co-Fe alloy, and the MoS 2 nanosheet accelerated electron transfer and dispersion with good electrical conductivities. The carbon layer of the Co-Fe alloy effectively reduced the oxidation and passivation in electrocatalysis while improving its catalytic performances ( Figure 5 ) [ 51 ].…”

Section: Classification Of Bifunctional Orr/oer Catalystsmentioning

confidence: 99%

Research Progress of Bifunctional Oxygen Reactive Electrocatalysts for Zinc–Air Batteries

et al. 2022

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Zinc–air batteries (ZABs) have several advantages, including high energy density, cheap price and stable performances with good application prospects in the field of power batteries. The charging and discharging reactions for the air cathode of ZABs are the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), respectively, which play an important role in the whole performance of ZAB. Due to the cost and limited reserves of highly active precious metal catalysts, it is crucial to design alternative efficient and stable dual-functional non-precious metal catalysts. In the present review, we present a systematic summary of the recent progress in the use of transition metal-based electrocatalysts as alternatives to precious metals for the positive poles of ZAB air. Combined with state-of-the-art in situ characterization technologies, a deep understanding of the catalytic mechanism of OER/ORR provided unique insights into the precise design of excellent synthetic non-precious metal catalysts from the perspective of atomic structure. This review further shows that the hybrid electric battery is a new strategy to improve the efficiency of the hybrid electric battery, which could be available to alleviate the problem of resource shortage. Finally, the challenges and research trends for the future development of ZABs were clearly proposed.

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“…The synergistic effect of different components in the catalyst system can also improve the catalytic performance. , Fundamentally speaking, the electronic effect generated by the change of chemical environment plays an important role, and the redistribution of the electron cloud density can regulate the binding energy of intermediates, reconstruct the active center, and further change the catalytic performance. , It has been reported that cobalt has a strong coupling ability, and a small amount of Co can prevent carbon deposition at active Ni sites. Therefore, the presence of Co is a key factor contributing to the rapid dispersion and carbon suppression of active Ni. − Zhou et al prepared a Ni–Co/CNT catalyst by loading nickel and cobalt ions on CNTs and using carbon self-reduction at high temperatures .…”

Section: Introductionmentioning

confidence: 99%

Bimetallic NiCo/AC Catalysts with a Strong Coupling Effect for High-Efficiency Hydrogenation of N-Ethylcarbazole

Wang

Dong

et al. 2023

ACS Appl. Energy Mater.

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Liquid organic hydrogen carrier technology (LOHC) is considered to be the most promising solution for hydrogen storage and transport, but its development is limited by the high cost of noble metal catalysts. In this paper, four kinds of Ni/Co bimetallic catalysts with different proportions were prepared by the impregnation method. The effects of the Ni/Co molar ratio and the reduction temperature on the hydrogenation performance of N-ethylcarbazole (NEC) were studied. The relationship between the structure and the properties of the catalyst was discussed by combining various characterization methods. The results show that when cobalt is added to 50%, the hydrogenation activity is the most significant. Meanwhile, 100% of NEC conversion and 98.99% of 12H-NEC selectivity were achieved. The hydrogenation capacity is 5.77 wt %, when the catalyst reduction temperature is 450 °C. The characterizations show that the two metals are uniformly doped and highly dispersed with a good pore structure, and the metal particles have good alloy morphology. The synergistic interaction between Ni/Co metals is the key factor for the remarkable catalytic activity of the catalyst. The design and application of highly efficient nonprecious metal hydrogenation catalysts provide more feasibility to promote the commercial development of liquid organic hydrogen carrier technology.

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Effect of Co-Fe alloy nanoparticles on the surface electronic structure of molybdenum disulfide nanosheets and its application as a bifunctional catalyst for rechargeable zinc air battery

Cited by 13 publications

References 41 publications

Preparation and Study of Ti₃C₂T_x MXene–Deficient In Situ Anchored Fe−Co Alloy Nanoparticle Electrocatalyst for Hydrolysis and Hydrogenolysis

Preparation and Study of Ti₃C₂T_x MXene–Deficient In Situ Anchored Fe−Co Alloy Nanoparticle Electrocatalyst for Hydrolysis and Hydrogenolysis

Research Progress of Bifunctional Oxygen Reactive Electrocatalysts for Zinc–Air Batteries

Bimetallic NiCo/AC Catalysts with a Strong Coupling Effect for High-Efficiency Hydrogenation of N-Ethylcarbazole

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Effect of Co-Fe alloy nanoparticles on the surface electronic structure of molybdenum disulfide nanosheets and its application as a bifunctional catalyst for rechargeable zinc air battery

Cited by 13 publications

References 41 publications

Preparation and Study of Ti3C2Tx MXene–Deficient In Situ Anchored Fe−Co Alloy Nanoparticle Electrocatalyst for Hydrolysis and Hydrogenolysis

Preparation and Study of Ti3C2Tx MXene–Deficient In Situ Anchored Fe−Co Alloy Nanoparticle Electrocatalyst for Hydrolysis and Hydrogenolysis

Research Progress of Bifunctional Oxygen Reactive Electrocatalysts for Zinc–Air Batteries

Bimetallic NiCo/AC Catalysts with a Strong Coupling Effect for High-Efficiency Hydrogenation of N-Ethylcarbazole

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Preparation and Study of Ti₃C₂T_x MXene–Deficient In Situ Anchored Fe−Co Alloy Nanoparticle Electrocatalyst for Hydrolysis and Hydrogenolysis

Preparation and Study of Ti₃C₂T_x MXene–Deficient In Situ Anchored Fe−Co Alloy Nanoparticle Electrocatalyst for Hydrolysis and Hydrogenolysis