Scholarlink

<p>Developing a highly efficient and low-cost bifunctional oxygen electrode catalytic material is of vital importance for the development of energy conversion and storage devices. Perovskite-type oxides (ABO<sub>3</sub>) have been widely studied as one of the new candidate catalysts for oxygen electrodes due to their excellent catalytic performance. In this study, we synthesized MXene TiVCT<i>ₓ</i> and perovskite oxide La<sub>0.4</sub>Ca<sub>0.6</sub>Co<sub>0.6</sub>Fe<sub>0.4</sub>O<sub>3</sub>, and combined the two materials at different mass ratios to prepare catalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). The oxygen electrode catalyzed by 10% TiVCT<sub><i>x</i></sub> (TiVCT<sub><i>x</i></sub> accounts for 10% of the total mass of the composite catalyst) exhibited excellent stability under steady-state galvanostatic conditions. In the polarization test, the catalytic oxygen electrode displayed the highest current densities of 0.3889&#xa0;A·cm<sup>− 2</sup> (1.0&#xa0;V vs. Hg/HgO) in anode mode and 0.2712&#xa0;A·cm<sup>− 2</sup> (-0.6&#xa0;V vs. Hg/HgO) in cathode mode. The charge transfer resistance of the electrode catalyzed by 10% TiVCT<sub><i>x</i></sub> was lower than that of La<sub>0.4</sub>Ca<sub>0.6</sub>Co<sub>0.6</sub>Fe<sub>0.4</sub>O<sub>3</sub> and TiVCT<sub><i>x</i></sub>. The results showed that the optimal mass ratio of TiVCT<i>ₓ</i> to La<sub>0.4</sub>Ca<sub>0.6</sub>Co<sub>0.6</sub>Fe<sub>0.4</sub>O<sub>3</sub> maximized the synergistic effect, yielding the best catalytic activity for oxygen evolution and oxygen reduction reactions. This provides reliable material design ideas and experimental evidence for building efficient, stable and low-cost bifunctional oxygen electrodes.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Catalytic performance of TiVCTx@La0.4Ca0.6Co0.6Fe0.4O3 composites toward the oxygen evolution and oxygen reduction reactions

  • 期刊论文

  • 发表日期：

    2026年7月30日

查看全文
  • Jie-yu Liang,
  • Hua‑ling Wang,
  • Hong-xia Huang,
  • Qiu-ting Huang,
  • Hou-qing Zhou,
  • Xiao-dong Tang,
  • Ji-hua Ma

摘要

Developing a highly efficient and low-cost bifunctional oxygen electrode catalytic material is of vital importance for the development of energy conversion and storage devices. Perovskite-type oxides (ABO3) have been widely studied as one of the new candidate catalysts for oxygen electrodes due to their excellent catalytic performance. In this study, we synthesized MXene TiVCTₓ and perovskite oxide La0.4Ca0.6Co0.6Fe0.4O3, and combined the two materials at different mass ratios to prepare catalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). The oxygen electrode catalyzed by 10% TiVCTx (TiVCTx accounts for 10% of the total mass of the composite catalyst) exhibited excellent stability under steady-state galvanostatic conditions. In the polarization test, the catalytic oxygen electrode displayed the highest current densities of 0.3889 A·cm− 2 (1.0 V vs. Hg/HgO) in anode mode and 0.2712 A·cm− 2 (-0.6 V vs. Hg/HgO) in cathode mode. The charge transfer resistance of the electrode catalyzed by 10% TiVCTx was lower than that of La0.4Ca0.6Co0.6Fe0.4O3 and TiVCTx. The results showed that the optimal mass ratio of TiVCTₓ to La0.4Ca0.6Co0.6Fe0.4O3 maximized the synergistic effect, yielding the best catalytic activity for oxygen evolution and oxygen reduction reactions. This provides reliable material design ideas and experimental evidence for building efficient, stable and low-cost bifunctional oxygen electrodes.