Scholarlink

<p>Rechargeable zinc-air batteries (ZABs) have attracted considerable attention owing to their high energy density and cost-effectiveness. However, the sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the air cathode remain significant challenges, necessitating the development of efficient bifunctional electrocatalysts. Herein, waste ACQ-treated wood was utilized as a sustainable precursor to fabricate a Cu-doped porous biochar catalyst via a two-step pyrolysis and KOH activation strategy. During the activation process, Cu species from the ACQ preservative were converted into Cu/Cu<sub>2</sub>O/CuO nanoparticles that uniformly dispersed within the hierarchical porous carbon framework, while simultaneously introducing abundant defects and edge sites into the carbon skeleton. The optimized catalyst (KAWB-12, activated for 12&#xa0;h) demonstrated remarkable bifunctional catalytic performance, delivering an ORR half-wave potential (E<sub>1/2</sub>) of 0.85&#xa0;V that surpasses commercial Pt/C and an OER overpotential of 389&#xa0;mV at 10&#xa0;mA&#xa0;cm<sup>−2</sup> comparable to RuO<sub>2</sub>. When assembled as the air cathode in a liquid ZABs, KAWB-12 exhibited an open-circuit voltage of 1.47&#xa0;V, a high peak power density of 133.83 mW cm<sup>−2</sup>, a specific capacity of 776.53 mAh g<sup>−1</sup>, and stable cycling performance about 348&#xa0;h at 10&#xa0;mA&#xa0;cm<sup>−2</sup>, surpassing the Pt/C-based battery. Consequently, this work demonstrates a sustainable strategy for transforming waste ACQ-treated wood into high-performance bifunctional electrocatalysts, offering a scalable approach for developing cost-effective ZAB catalyst materials.</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

Cu-doped biochar derived from waste ACQ-treated wood as catalyst for high-performance zinc-air batteries

  • 期刊论文

  • 发表日期：

    2026年5月5日

查看全文
  • Gechi Liu,
  • Jian Lin

摘要

Rechargeable zinc-air batteries (ZABs) have attracted considerable attention owing to their high energy density and cost-effectiveness. However, the sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the air cathode remain significant challenges, necessitating the development of efficient bifunctional electrocatalysts. Herein, waste ACQ-treated wood was utilized as a sustainable precursor to fabricate a Cu-doped porous biochar catalyst via a two-step pyrolysis and KOH activation strategy. During the activation process, Cu species from the ACQ preservative were converted into Cu/Cu2O/CuO nanoparticles that uniformly dispersed within the hierarchical porous carbon framework, while simultaneously introducing abundant defects and edge sites into the carbon skeleton. The optimized catalyst (KAWB-12, activated for 12 h) demonstrated remarkable bifunctional catalytic performance, delivering an ORR half-wave potential (E1/2) of 0.85 V that surpasses commercial Pt/C and an OER overpotential of 389 mV at 10 mA cm−2 comparable to RuO2. When assembled as the air cathode in a liquid ZABs, KAWB-12 exhibited an open-circuit voltage of 1.47 V, a high peak power density of 133.83 mW cm−2, a specific capacity of 776.53 mAh g−1, and stable cycling performance about 348 h at 10 mA cm−2, surpassing the Pt/C-based battery. Consequently, this work demonstrates a sustainable strategy for transforming waste ACQ-treated wood into high-performance bifunctional electrocatalysts, offering a scalable approach for developing cost-effective ZAB catalyst materials.