Two-Dimensional Titanium and Molybdenum Carbide MXenes as Electrocatalysts for CO2 Reduction

Handoko, Albertus D.; Chen, Hetian; Lum, Yanwei; Zhang, Qianfan; Anasori, Babak; Seh, Zhi Wei

doi:10.1016/j.isci.2020.101181

Cited by 134 publications

(109 citation statements)

References 53 publications

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“…The survey of PP separator demonstrated a peak of C1s and a weak of O1s from the environment ( Figure 3 c). The MXene/PP and MXene delivered four strong peaks associating to C1s, Ti 2p, O1s, and F1s, which indicated that the MXene was successfully loaded on the MXene/PP [ 27 , 41 , 42 ]. Furthermore, from the high resolution of C1s ( Figure 3 d), an obvious peak at ~281.8 eV of C–Ti bond could be detected in MXene/PP separator [ 20 , 24 ].…”

Section: Resultsmentioning

confidence: 99%

Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

et al. 2020

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In this work, a few-layer MXene is prepared and sprinkled on a commercial polypropylene (PP) separator by a facile spraying method to enhance the electrochemistry of the Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode. Scanning electron microscope (SEM) and X-ray diffraction (XRD) are used to characterize the morphology and structure of MXene. Fourier transform infrared spectroscopy (FT-IR) and a contact angle tester are used to measure the bond structure and surface wettability PP and MXene/PP separator. The effect of the MXene/PP separator on the electrochemical performance of ternary NCM811 material is tested by an electrochemical workstation. The results show that the two-dimensional MXene material could improve the wettability of the separator to the electrolyte and greatly enhance the electrochemical properties of the NCM811 cathode. During 0.5 C current density cycling, the Li/NCM811 cell with MXene/PP separator remains at 166.2 mAh/g after the 100 cycles with ~90.7% retention. The Rct of MXene/PP cell is measured to be ~28.0 Ω. Combining all analyses results related to MXene/PP separator, the strategy by spraying the MXene on commercial PP is considered as a simple, convenient, and effective way to improve the electrochemical performance of the Ni-rich NCM811 cathode and it is expected to achieve large-scale in high-performance lithium-ion batteries in the near future.

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Section: Resultsmentioning

confidence: 99%

Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

et al. 2020

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“…[ 121 ] Recently, a peak Faradaic efficiency of over 56% on Ti 2 CT x and partial current density of up to –2.5 mA cm −2 on Mo 2 CT x was achieved experimentally with HCOOH as the main carbon‐based product. [ 122 ] Furthermore, both experimental and theoretical results show that increasing the amount of F terminations on the MXenes can lead to better CO 2 RR performance.…”

Section: Applications In Electrocatalysismentioning

confidence: 99%

“…HER is the main competing reaction in N 2 RR and CO 2 RR, thus the stabilization of key intermediates by cooperating with other active catalytic species is vital to improve the product selectivity. For example, only two electron transfer steps have been achieved in CO 2 RR catalyzed by MXenes; [ 122 ] thus, the combination with other active components and the resulting synergistic effects should be emphasized in the future.…”

Section: Challenges and Opportunitiesmentioning

confidence: 99%

Challenges and Opportunities in Utilizing MXenes of Carbides and Nitrides as Electrocatalysts

Wang

Nian

Biswas

et al. 2020

Advanced Energy Materials

102

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Sustainable energy conversion processes often require electrochemical reactions powered by renewable energy sources. 2D transition metal carbides and nitrides (MXenes), an important and growing class of 2D materials, have been demonstrated to be promising candidates for heterogeneous electrocatalysis due to their unique electronic, physical, chemical, and mechanical properties. Significant efforts have been made in the development of MXenes and MXene‐derived electrocatalysts for various electrochemical reactions, including the hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, carbon dioxide reduction reaction, nitrogen reduction reaction, and methanol oxidation reaction. MXenes from earth‐abundant metals provide the potential for large‐scale applications, and their well‐defined structures allow for the identification of active sites and catalytic mechanisms. Herein, recent studies of MXenes in electrocatalysis are reviewed, and the challenges and opportunities for the design and fabrication of MXenes and MXene‐based materials with desired electrocatalytic properties are discussed.

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“…15 MXenes have the general formula M n+1 X n T z , where T stands for surface terminating groups (-O, -OH, -F and/or -Cl) [16][17][18][19] that replaces the A layer upon etching. To date, MXenes have shown promise for a wide range of applications, including energy storage, 20,21 hydrogen evolution, [22][23][24] photocatalysis, 25 CO 2 reduction, 26 CO 2 capture, 27 electromagnetic shielding, 28 water purification, 29,30 and biomedical applications 31 among many others. In addition, they can be used as transparent conducting electrodes, 32 gas sensors and biosensors.…”

Section: Introductionmentioning

confidence: 99%

Tailored synthesis approach of (Mo_2/3Y_1/3)₂AlC i-MAX and its two-dimensional derivative Mo_1.33CT_z MXene: enhancing the yield, quality, and performance in supercapacitor applications

et al. 2021

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Two-Dimensional Titanium and Molybdenum Carbide MXenes as Electrocatalysts for CO2 Reduction

Cited by 134 publications

References 53 publications

Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

Challenges and Opportunities in Utilizing MXenes of Carbides and Nitrides as Electrocatalysts

Tailored synthesis approach of (Mo_2/3Y_1/3)₂AlC i-MAX and its two-dimensional derivative Mo_1.33CT_z MXene: enhancing the yield, quality, and performance in supercapacitor applications

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Two-Dimensional Titanium and Molybdenum Carbide MXenes as Electrocatalysts for CO2 Reduction

Cited by 134 publications

References 53 publications

Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

Assembly of MXene/PP Separator and Its Enhancement for Ni-Rich LiNi0.8Co0.1Mn0.1O2 Electrochemical Performance

Challenges and Opportunities in Utilizing MXenes of Carbides and Nitrides as Electrocatalysts

Tailored synthesis approach of (Mo2/3Y1/3)2AlC i-MAX and its two-dimensional derivative Mo1.33CTz MXene: enhancing the yield, quality, and performance in supercapacitor applications

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Tailored synthesis approach of (Mo_2/3Y_1/3)₂AlC i-MAX and its two-dimensional derivative Mo_1.33CT_z MXene: enhancing the yield, quality, and performance in supercapacitor applications