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<p>Heteroatom-doped and crystal facet engineering are important strategies for catalyst design and performance optimization. In this study, we combined these two strategies together and developed an alcohol solvent mediated strategy to synthesize a trimetallic metal-organic frameworks catalyst (NiCuZn-MOF) with cubic morphology via a facile solvothermal method. By adjusting the alcohol solvents (ethanol/propanol/butanol), the Cu/Zn atoms can smoothly enter the metal-organic framework (MOF) structure and replace some of the Ni atoms in MOF-5 structure. Moreover, the alcohol solvents can also help expose some crystal surface structures that are beneficial for catalytic activity. Among them, the NiCuZn-MOF-PA catalyst prepared with propanol as the solvent exhibited the most excellent catalytic performance in methanol oxidation reaction (MOR) with the geometric activity (489.46&#xa0;mA cm<sup>− 2</sup>), mass activity (6454.93&#xa0;mA mg<sup>− 1</sup>) at 1.923&#xa0;V and 12&#xa0;h continuous stability. X-ray photoelectron spectroscopy (XPS) and in-situ Raman spectroscopy analyses revealed the synergistic effect between the ternary metals and formation of active intermediate species, which can help understand the mechanism of catalytic reactions. This study not only provides new ideas for developing efficient non-precious metal methanol oxidation catalysts but also establishes effective methodological guidance for the structural design and performance regulation of MOF-based electrocatalysts, which is of great significance for promoting the practical application of direct methanol fuel cells (DMFCs).</p>

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Heteroatom-doped and solvent induced crystal facet engineering on NiCuZn-MOF to promote methanol oxidation

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Xiaoying Yang,
  • Guanrong Lin,
  • Manzhen Zhao,
  • Zhi Lin,
  • Qi Chen,
  • Baohua Zhang,
  • Shengrun Zheng,
  • Songliang Cai,
  • Jun Fan,
  • Bolin Zhao,
  • Weiguang Zhang,
  • Yuwei Zhang

摘要

Heteroatom-doped and crystal facet engineering are important strategies for catalyst design and performance optimization. In this study, we combined these two strategies together and developed an alcohol solvent mediated strategy to synthesize a trimetallic metal-organic frameworks catalyst (NiCuZn-MOF) with cubic morphology via a facile solvothermal method. By adjusting the alcohol solvents (ethanol/propanol/butanol), the Cu/Zn atoms can smoothly enter the metal-organic framework (MOF) structure and replace some of the Ni atoms in MOF-5 structure. Moreover, the alcohol solvents can also help expose some crystal surface structures that are beneficial for catalytic activity. Among them, the NiCuZn-MOF-PA catalyst prepared with propanol as the solvent exhibited the most excellent catalytic performance in methanol oxidation reaction (MOR) with the geometric activity (489.46 mA cm− 2), mass activity (6454.93 mA mg− 1) at 1.923 V and 12 h continuous stability. X-ray photoelectron spectroscopy (XPS) and in-situ Raman spectroscopy analyses revealed the synergistic effect between the ternary metals and formation of active intermediate species, which can help understand the mechanism of catalytic reactions. This study not only provides new ideas for developing efficient non-precious metal methanol oxidation catalysts but also establishes effective methodological guidance for the structural design and performance regulation of MOF-based electrocatalysts, which is of great significance for promoting the practical application of direct methanol fuel cells (DMFCs).