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Research Article | Open Access

Synthesis of Mo2C MXene with high electrochemical performance by alkali hydrothermal etching

Yitong GuoXin Zhang( )Sen JinQixun XiaYukai ChangLibo WangAiguo Zhou( )
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
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Graphical Abstract


Two-dimensional MXenes are generally prepared by the etching of acid solutions. The as-synthesized MXenes are terminated by acid group anions (F, Cl, etc.), which affect the electrochemical performance of MXenes. Here, we report a novel method to prepare Mo2C MXene from Mo2Ga2C by the hydrothermal etching of alkali solutions. Highly pure Mo2C MXene was successfully synthesized by the etching of NaOH, while the etchings of LiOH and KOH were failed. The concentration of NaOH, temperature, and time strongly affect the purity of as-prepared MXene. Pure Mo2C MXene could be synthesized by the etching of 20 M NaOH at 180 ℃ for 24 h. After intercalation by hexadecyl trimethyl ammonium bromide at 90 ℃ for 96 h, few-layer Mo2C MXene was obtained. The Mo2C MXene made by NaOH etching after intercalation exhibited excellent performance as anode of lithium-ion battery, compared with general Mo2C MXene made by HF etching and the Mo2C MXene reported in literature. The final discharge specific capacity was 266.73 mAh·g−1 at 0.8 A·g−1, which is 52% higher than that Mo2C made by HF etching (175.77 mAh·g−1). This is because Mo2C MXene made by NaOH etching has lager specific surface area, lower resistance, and pure O/OH termination without acid anion termination. This is the first report to make Mo2C MXene by alkali etching and the samples made by this method exhibited significantly better electrochemical performance than the samples made by general HF etching.


Naguib M, Kurtoglu M, Presser V, et al. Two-dimensional nanocrystals produced by exfoliation of Ti3AlC2. Adv Mater 2011, 23: 4248–4253.
VahidMohammadi A, Rosen J, Gogotsi Y. The world of two-dimensional carbides and nitrides (MXenes). Science 2021, 372: eabf1581.
Fan JC, Yuan MM, Wang LB, et al. MXene supported by cotton fabric as electrode layer of triboelectric nanogenerators for flexible sensors. Nano Energy 2023, 105: 107973.
Du H, Zhang QP, Zhao B, et al. Novel hierarchical structure of MoS2/TiO2/Ti3C2Tx composites for dramatically enhanced electromagnetic absorbing properties. J Adv Ceram 2021, 10: 1042–1051.
Syamsai R. MXenes: Synthesis, properties, and electrochemical performance of titanium, vanadium, and tantalum carbide MXenes as supercapacitor electrodes. In Advanced Ceramics for Versatile Interdisciplinary Applications. Amsterdam: Elsevier, 2022: 387–416.
Li XL, Huang ZD, Shuck CE, et al. MXene chemistry, electrochemistry and energy storage applications. Nat Rev Chem 2022, 6: 389–404.
Jin S, Guo YT, Wang FL, et al. The synthesis of MXenes. MRS Bull 2023, 48: 245–252.
Zhou AG, Liu Y, Li SB, et al. From structural ceramics to 2D materials with multi-applications: A review on the development from MAX phases to MXenes. J Adv Ceram 2021, 10: 1194–1242.
Deeva EB, Kurlov A, Abdala PM, et al. In situ XANES/XRD study of the structural stability of two-dimensional molybdenum carbide Mo2CTx: Implications for the catalytic activity in the water–gas shift reaction. Chem Mater 2019, 31: 4505–4513.
Li ZY, Wang LB, Sun DD, et al. Synthesis and thermal stability of two-dimensional carbide MXene Ti3C2. Mater Sci Eng B 2015, 191: 33–40.
Hu FY, Zhang F, Wang XH, et al. Ultrabroad band microwave absorption from hierarchical MoO3/TiO2/Mo2TiC2Tx hybrids via annealing treatment. J Adv Ceram 2022, 11: 1466–1478.
Liu FF, Liu YC, Zhao XD, et al. Batteries: Prelithiated V2C MXene: A high-performance electrode for hybrid magnesium/lithium-ion batteries by ion cointercalation (small 8/2020). Small 2020, 16: 2070043.
Guo YT, Jin S, Wang LB, et al. Synthesis of two-dimensional carbide Mo2CTx MXene by hydrothermal etching with fluorides and its thermal stability. Ceram Int 2020, 46: 19550–19556.
Wu M, He M, Hu QK, et al. Ti3C2 MXene-based sensors with high selectivity for NH3 detection at room temperature. ACS Sens 2019, 4: 2763–2770.
Sun W, Shah SA, Chen Y, et al. Electrochemical etching of Ti2AlC to Ti2CTx (MXene) in low-concentration hydrochloric acid solution. J Mater Chem A 2017, 5: 21663–21668.
Pang SY, Wong YT, Yuan SG, et al. Universal strategy for HF-free facile and rapid synthesis of two-dimensional MXenes as multifunctional energy materials. J Am Chem Soc 2019, 141: 9610–9616.
Li M, Lu J, Luo K, et al. Element replacement approach by reaction with Lewis acidic molten salts to synthesize nanolaminated MAX phases and MXenes. J Am Chem Soc 2019, 141: 4730–4737.
Liu LY, Orbay M, Luo S, et al. Exfoliation and delamination of Ti3C2Tx MXene prepared via molten salt etching route. ACS Nano 2022, 16: 111–118.
Jawaid A, Hassan A, Neher G, et al. Halogen etch of Ti3AlC2 MAX phase for MXene fabrication. ACS Nano 2021, 15: 2771–2777.
Kim H, Anasori B, Gogotsi Y, et al. Thermoelectric properties of two-dimensional molybdenum-based MXenes. Chem Mater 2017, 29: 6472–6479.
Guo YT, Du JY, Hu MH, et al. Improve thermoelectric performance of Bi2Te3 by incorporation of Mo2C MXene with N-type conductivity. J Mater Sci Mater Electron 2023, 34: 1–13.
Seh ZW, Fredrickson KD, Anasori B, et al. Two-dimensional molybdenum carbide (MXene) as an efficient electrocatalyst for hydrogen evolution. ACS Energy Lett 2016, 1: 589–594.
Jin S, Jing HJ, Wang LB, et al. Construction and performance of CdS/MoO2@Mo2C-MXene photocatalyst for H2 production. J Adv Ceram 2022, 11: 1431–1444.
Jin S, Wu JB, Jiang JZ, et al. Boosting photocatalytic performance of CdxZn1–xS for H2 production by Mo2C MXene with large interlayer distance. J Mater Chem A 2023, 11: 5851–5863.
Jin S, Shi ZH, Jing HJ, et al. Mo2C-MXene/CdS heterostructures as visible-light photocatalysts with an ultrahigh hydrogen production rate. ACS Appl Energy Mater 2021, 4: 12754–12766.
Meshkian R, Näslund LÅ, Halim J, et al. Synthesis of two-dimensional molybdenum carbide, Mo2C, from the gallium based atomic laminate Mo2Ga2C. Scripta Mater 2015, 108: 147–150.
Halim J, Kota S, Lukatskaya MR, et al. Synthesis and characterization of 2D molybdenum carbide (MXene). Adv Funct Mater 2016, 26: 3118–3127.
Jin S, Guo YT, Wang JK, et al. Carbon dioxide adsorption of two-dimensional Mo2C MXene. Diam Relat Mater 2022, 128: 109277.
Wang CD, Shou HW, Chen SM, et al. HCl-based hydrothermal etching strategy toward fluoride-free MXenes. Adv Mater 2021, 33: e2101015.
Wang FL, Jin S, Du YQ, et al. Preparation of Mo2CTx MXene as co-catalyst for H2 production by etching of pure/mixed HBr solution. Diam Relat Mater 2023, 136: 109922.
Mei J, Ayoko GA, Hu CF, et al. Two-dimensional fluorine-free mesoporous Mo2C MXene via UV-induced selective etching of Mo2Ga2C for energy storage. Sustain Mater Technol 2020, 25: e00156.
Guo YT, Liu DR, Huang BW, et al. Effects of surface compositions and interlayer distance on electrochemical performance of Mo2CTx MXene as anode of Li-ion batteries. J Phys Chem Solids 2023, 176: 111238.
Schultz T, Frey NC, Hantanasirisakul K, et al. Surface termination dependent work function and electronic properties of Ti3C2Tx MXene. Chem Mater 2019, 31: 6590–6597.
Mehta V, Saini HS, Srivastava S, et al. S-functionalized Mo2C monolayer as a novel electrode material in Li-ion batteries. J Phys Chem C 2019, 123: 25052–25060.
Li TF, Yao LL, Liu QL, et al. Fluorine-free synthesis of high-purity Ti3C2Tx (T=OH, O) via alkali treatment. Angew Chem Int Ed 2018, 57: 6115–6119.
Li GN, Tan L, Zhang YM, et al. Highly efficiently delaminated single-layered MXene nanosheets with large lateral size. Langmuir 2017, 33: 9000–9006.
Zhang B, Zhu JF, Shi P, et al. Fluoride-free synthesis and microstructure evolution of novel two-dimensional Ti3C2(OH)2 nanoribbons as high-performance anode materials for lithium-ion batteries. Ceram Int 2019, 45: 8395–8405.
Mashtalir O, Naguib M, Mochalin VN, et al. Intercalation and delamination of layered carbides and carbonitrides. Nat Commun 2013, 4: 1716.
Chen JY, Xue ZH, Li YL, et al. Effects of intercalation on the interlayer electron-transfer process in Mo-based multilayered MXene flakes. J Phys Chem C 2021, 125: 17232–17240.
He HT, Jin S, Fan GX, et al. Synthesis mechanisms and thermal stability of ternary carbide Mo2Ga2C. Ceram Int 2018, 44: 22289–22296.
Jin S, Su TC, Hu QK, et al. Thermal conductivity and electrical transport properties of double-A-layer MAX phase Mo2Ga2C. Mater Res Lett 2020, 8: 158–164.
Qi XX, Yin WL, Jin S, et al. Density-functional-theory predictions of mechanical behaviour and thermal properties as well as experimental hardness of the Ga-bilayer Mo2Ga2C. J Adv Ceram 2022, 11: 273–282.
Gladyshev S, Akcil A, Abdulvaliev R, et al. Kinetic study of gallium electrochemical reduction in alkaline solution. Hydrometallurgy 2013, 140: 95–101.
Bayhan Z, El-Demellawi JK, Yin J, et al. A laser-induced Mo2CTx MXene hybrid anode for high-performance Li-ion batteries. Small 2023: e2208253.
Hu C, Lai C, Tao Q, et al. Mo2Ga2C: A new ternary nanolaminated carbide. Chem Commun 2015, 51: 6560–6563.
Feng W, Wang RY, Zhou YD, et al. Ultrathin molybdenum carbide MXene with fast biodegradability for highly efficient theory-oriented photonic tumor hyperthermia. Adv Funct Mater 2019, 29: 1901942.
Wan LJ, Tang YQ, Chen L, et al. In-situ construction of g-C3N4/Mo2CTx hybrid for superior lithium storage with significantly improved Coulombic efficiency and cycling stability. Chem Eng J 2021, 410: 128349.
Lai CC, Meshkian R, Dahlqvist M, et al. Structural and chemical determination of the new nanolaminated carbide Mo2Ga2C from first principles and materials analysis. Acta Mater 2015, 99: 157–164.
Halim J, Cook KM, Naguib M, et al. X-ray photoelectron spectroscopy of select multi-layered transition metal carbides (MXenes). Appl Surf Sci 2016, 362: 406–417.
Cossu G, Ingo GM, Mattogno G, et al. XPS investigation on vacuum thermal desorption of UV/ozone treated GaAs(100) surfaces. Appl Surf Sci 1992, 56–58: 81–88.
Naguib M, Mashtalir O, Carle J, et al. Two-dimensional transition metal carbides. ACS Nano 2012, 6: 1322–1331.
Li YP, Zhang Q, Xu TH, et al. LaF3 nanolayer surface modified spinel LiNi0.5Mn1.5O4 cathode material for advanced lithium-ion batteries. Ceram Int 2018, 44: 4058–4066.
Zhao SS, Meng X, Zhu K, et al. Li-ion uptake and increase in interlayer spacing of Nb4C3 MXene. Energy Storage Mater 2017, 8: 42–48.
Zou GD, Zhang ZW, Guo JX, et al. Synthesis of MXene/Ag composites for extraordinary long cycle lifetime lithium storage at high rates. ACS Appl Mater Interfaces 2016, 8: 22280–22286.
Qin J, He CN, Zhao NQ, et al. Graphene networks anchored with Sn@graphene as lithium ion battery anode. ACS Nano 2014, 8: 1728–1738.
Ahmed B, Anjum DH, Hedhili MN, et al. H2O2 assisted room temperature oxidation of Ti2C MXene for Li-ion battery anodes. Nanoscale 2016, 8: 7580–7587.
Xie Y, Naguib M, Mochalin VN, et al. Role of surface structure on Li-ion energy storage capacity of two-dimensional transition-metal carbides. J Am Chem Soc 2014, 136: 6385–6394.
Byeon A, Hatter CB, Park JH, et al. Molybdenum oxide/carbon composites derived from the CO2 oxidation of Mo2CTx (MXene) for lithium ion battery anodes. Electrochim Acta 2017, 258: 979–987.
Ahamad T, Naushad M, Ubaidullah M, et al. Birnessite-type manganese dioxide nanoparticles embedded with nitrogen-doped carbon for high-performance supercapacitor. J Energy Storage 2020, 32: 101952.
Suganya B, Maruthamuthu S, Chandrasekaran J, et al. Design of zinc vanadate (Zn3V2O8)/nitrogen doped multiwall carbon nanotubes (N-MWCNT) towards supercapacitor electrode applications. J Electroanal Chem 2021, 881: 114936.
Pandit B, Rondiya SR, Shaikh SF, et al. Regulated electrochemical performance of manganese oxide cathode for potassium-ion batteries: A combined experimental and first-principles density functional theory (DFT) investigation. J Colloid Interface Sci 2023, 633: 886–896.
Journal of Advanced Ceramics
Pages 1889-1901
Cite this article:
Guo Y, Zhang X, Jin S, et al. Synthesis of Mo2C MXene with high electrochemical performance by alkali hydrothermal etching. Journal of Advanced Ceramics, 2023, 12(10): 1889-1901.








Web of Science






Received: 09 June 2023
Revised: 10 July 2023
Accepted: 02 August 2023
Published: 25 October 2023
© The Author(s) 2023.

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