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2025 Vol.35, Issue 8 Preview Page

Research Paper

Controllable Preparation of N-modified Cu-MOFs for Enhanced Steering CO2 Electroreduction Toward CH4 Products
Haixia Wang1*
,
Yilei Sun2*
,
Yao Liu2
,
Kunjie Li3
,
Zeda Meng2†
,
Won-Chun Oh4†
1Applied Technology College of Soochow University, Suzhou 215009, China
2School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, China
3Dong yang guang UACJ Fine Aluminum Foil Co., Ltd., Ruyuan, Guangdong, 512700, China
4Department of Advanced Materials Science and Engineering, Hanseo University, Seosan 31962, Republic of Korea
†Corresponding author E-Mail : compelitely@163.com (Z. Meng, SUST), wc_oh@hanseo.ac.kr (W.-C. Oh, Hanseo Univ.)
*These two authors are equally contributed as first authors.
27 August 2025. pp. 352-365
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Abstract

The catalyst materials 0N-Cu-MOF, 1N-Cu-MOF, and 2N-Cu-MOF were successfully synthesized usinga solvothermal method, and using different concentrations of nitrogen-modified Cu organic frameworks (xN-Cu-MOF). Characterizations using X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) surface area analysis showed that 1N-Cu-MOF had the largest SSA and pore size among the three materials synthesized. 1N-Cu-MOF exhibited the largest pore size and specific surface area among the three materials, which had a decisive effect on CO2 reduction. In addition, stability and CO2 reduction reaction (CO2RR) activity were evaluated by linear sweep voltmeter, cyclic voltmeter, electrochemical impedance spectroscopy, and time flow tests. Faradaic efficiency (FE) was determined by product analysis. Among the three catalyst materials, 1N-Cu-MOF showed the best catalytic performance at 50 mA･cm-2 (maximum current density). The charge transfer resistance was 8.23 Ω, the average current density was 19.9 mA･cm-2, and the FE of methane (CH4) production showed a high efficiency of 70.45 % when tested for 12 h at an overpotential of -0.35 V (to-RHE).

Keywords
Cu-MOFs
N-doping
CO2 electroreduction
CH4
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 35
  • No :8
  • Pages :352-365
  • Received Date : 2025-05-02
  • Revised Date : 2025-07-28
  • Accepted Date : 2025-08-05
  • DOI :https://doi.org/10.3740/MRSK.2025.35.8.352
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