| 片状碳载金属纳米颗粒复合物的制备及其氧还原电活性 |
| Preparation and oxygen reduction electroactivity of metal nanoparticles loaded on sheet-like carbon composites |
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| 摘要: 将双氰胺、蔗糖与酞菁铁（钴）的混合物通过简单热解法，制备出Co/C-N、Fe/C-N和Fe-Co/C-N纳米复合物。随后利用热还原法，将少量铂沉积于Co/C-N上得到片状碳负载的Co-Pt纳米颗粒Co-Pt/C-N。对样品进行了详细表征，并研究了其在全域pH范围内（酸性、中性与碱性溶液）中的氧还原反应（ORR）活性。结果表明，Co/C-N具有比Fe/C-N和Fe-Co/C-N更高的ORR起始电位和半波电位，并且在碱性和中性溶液中，Co/C-N表现出比Pt/C更强的ORR电活性；在酸性溶液中，铂负载量（质量分数）8.1% 的Co-Pt/C-N表现出与Pt/C相近的ORR起始与半波电位。催化剂优异的电活性主要归因于片状碳形成的三维结构、金属纳米颗粒的均匀分布以及丰富的吡啶氮。 |
| 关键词: 氧还原反应 酞菁钴 酞菁铁 燃料电池 |
| 基金项目: 国家自然科学基金（No.21875062）和湖南省大学生创新训练项目（No.S202210534022）资助 |
| Abstract: Herein, Co/C-N, Fe/C-N, and Fe-Co/C-N nanocomposites were obtained by the self-template method, and high-temperature pyrolysis of the mixture composed of dicyandiamide, sucrose, and cobalt (ferric) phthalocyanine as nitrogen, carbon, and metal sources respectively. Then a small amount of platinum was deposited on the Co/C-N with better oxygen reduction reaction (ORR) electroactivity by thermal reduction to obtain carbon nanosheet-supported Co-Pt nanoparticles (Co-Pt/C-N). The catalysts were well characterized and tested for ORR. The Co/C-N catalyst displayed the onset potential (Eonset) and half-wave potential (E1/2) of ORR closed to the Pt/C in an alkaline solution, and it even presented the more positive onset potential and half-wave potential in a neutral solution. For Co-Pt/C-N, its ORR electroactivity in an acidic solution was greatly enhanced compared with the Co/C-N and was comparable to the Pt/C. The excellent ORR electroactivity of the samples is mainly attributed to the 3D structure formed by the carbon nanosheets, uniform distribution of the metal nanoparticles, and abundant pyridine N. |
| Keywords: oxygen reduction reaction cobalt phthalocyanine ferric phthalocyanine fuel cell |
| 投稿时间：2022-09-04 修订日期：2022-12-07 |
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| 章巧丽,王雅萍,孙万杰,易清风.片状碳载金属纳米颗粒复合物的制备及其氧还原电活性[J].无机化学学报,2023,39(2):346-356. |
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