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<p>In the heterogeneous electro-Fenton (Hetero-EF) process, the generation and activation efficiency of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) is an important factor affecting the performance. Based on ability of Mxene to regulate charge density at metal active sites and enhance electronic transport efficiency, a nanoflower-shaped CoSe and plateshaped Ti<sub>3</sub>C<sub>2</sub> composite (CoSe/Ti<sub>3</sub>C<sub>2</sub>) was developed for use as a Hetero-EF cathode catalyst. The results showed that CoSe/Ti<sub>3</sub>C<sub>2</sub> had excellent degradation performance, with a sulfamerazine (SMR) (10 mg·L<sup>-1</sup>) degradation efficiency of 100% within 80 min in the pH range of 3–7. CoSe/Ti<sub>3</sub>C<sub>2</sub> (<i>n</i> = 2.59) had a lower transfer electron number compared to that of CoSe (<i>n</i> = 3.21) and was more inclined towards 2e-ORR. Theoretical calculations showed that Ti<sub>3</sub>C<sub>2</sub> regulated the d-band center of CoSe, weakening adsorption strength of Co sites for the *OOH intermediate and making it more inclined to generate H<sub>2</sub>O<sub>2</sub>. Electron paramagnetic resonance (EPR) and quenching experiments indicated the presence of •OH, •O<sub>2</sub><sup>-</sup>, and <sup>1</sup>O<sub>2</sub> in the system, all of which participated in the degradation of pollutants. The construction of a multi reactive oxygen species system enhanced the interference resistance during degradation.</p>

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Titanium carbide-functionalized cobalt selenide as a heterogeneous electro-Fenton cathode catalyst for the degradation of sulfamerazine

  • 期刊论文

  • 发表日期：

    2025年6月9日

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  • Chunhui Yu,
  • Kuobo Wang,
  • Yingtao Fan,
  • Fan Yang,
  • Kexin Wei,
  • Chenlin Wang,
  • Xinyang Sun,
  • Junpu An,
  • Xiao Zhang,
  • Yongfeng Li

摘要

In the heterogeneous electro-Fenton (Hetero-EF) process, the generation and activation efficiency of hydrogen peroxide (H2O2) is an important factor affecting the performance. Based on ability of Mxene to regulate charge density at metal active sites and enhance electronic transport efficiency, a nanoflower-shaped CoSe and plateshaped Ti3C2 composite (CoSe/Ti3C2) was developed for use as a Hetero-EF cathode catalyst. The results showed that CoSe/Ti3C2 had excellent degradation performance, with a sulfamerazine (SMR) (10 mg·L-1) degradation efficiency of 100% within 80 min in the pH range of 3–7. CoSe/Ti3C2 (n = 2.59) had a lower transfer electron number compared to that of CoSe (n = 3.21) and was more inclined towards 2e-ORR. Theoretical calculations showed that Ti3C2 regulated the d-band center of CoSe, weakening adsorption strength of Co sites for the *OOH intermediate and making it more inclined to generate H2O2. Electron paramagnetic resonance (EPR) and quenching experiments indicated the presence of •OH, •O2-, and 1O2 in the system, all of which participated in the degradation of pollutants. The construction of a multi reactive oxygen species system enhanced the interference resistance during degradation.