| 李炜,骆芳婷,詹学农,刘国强.化学通报,2026,89(7):858-864. |
| 铁掺杂四氧化三钴及其氧析出活性研究 |
| 铁掺杂四氧化三钴及其氧析出活性研究 |
| 投稿时间：2026-02-28 修订日期：2026-04-11 |
| DOI： |
| 中文关键词: 电解水 四氧化三钴 铁掺杂 过电位 |
| 英文关键词:Water splitting Co3O4 Fe doping Overpotential |
| 基金项目:国家自然科学基金项目(52202080)、安徽省自然科学基金青年项目(2208085QE126)和安徽工业大学大学生创新训练项目(S202510360261)资助 |
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| 中文摘要: |
| 电解水被视为替代化石燃料制氢的理想途径，但其动力学缓慢的阳极析氧反应仍严重依赖贵金属催化剂。因此，开发低成本、高性能的非贵金属电极材料成为当前的研究热点。通过水热-煅烧两步法制备了纯相及铁掺杂Co3O4（Fex-Co3O4）（x= 0.05，0.10，0.20）电催化剂，并系统研究了其在碱性电解质中的氧析出性能。结果表明，铁掺杂诱导了Co3O4的晶格畸变，并促进了电子由钴位点向铁位点转移，调控了催化剂的电子结构，提高了本征活性。在1.0 M KOH电解液中，Fe0.1-Co3O4表现出最优的催化活性，达到40 mA cm-2电流密度所需的析氧过电位低至314 mV，优于商业IrO2的活性（343 mV）。该研究为基于阳离子掺杂策略设计高效非贵金属OER催化剂提供了参考。 |
| 英文摘要: |
| Electrolytic hydrogen production from water is regarded as an ideal alternative to fossil fuel-based hydrogen generation, yet the kinetically sluggish anodic oxygen evolution reaction remains heavily reliant on precious metal catalysts. Consequently, developing low-cost, high-performance non-precious metal electrode materials has become a current research focus. Pure-phase Co3O4 and a series of iron-doped Fex-Co3O4 (x= 0.05, 0.10, 0.20) electrocatalysts were synthesised via a two-step hydrothermal-calcination process, and their OER performance under alkaline conditions was systematically investigated. Structural characterisation confirmed that iron doping induced lattice distortion in Co3O4, facilitated electron transfer from cobalt to iron sites, modulated the catalyst"s electronic structure, and enhanced intrinsic activity. In 1.0 M KOH, Fe0.1-Co3O4 exhibited optimal catalytic activity with an overpotential as low as 314 mV to achieve a current density of 40 mA cm-2, superior to that of IrO2 (343 mV). This study provides a rationale for designing highly efficient non-precious metal OER catalysts based on cation doping strategies. |
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