| 师锦华,吴光平.化学通报,2021,84(9):932-936. |
| 基于超重力技术开展Co-N-CNTs催化剂制备及其氧还原性能的研究 |
| Study on preparation of Co-N-CNTs catalyst and its oxygen reduction performance via High-gravity Technology |
| 投稿时间：2021-02-03 修订日期：2021-02-26 |
| DOI： |
| 中文关键词: 燃料电池 氧还原反应 非贵金属催化剂 燃料电池 |
| 英文关键词:High-gravity technology, Oxygen reduction reaction, Non-precious electrocatalyst, Fuel cells |
| 基金项目:国家自然科学基金项目(21802013,21706019,21706019)、山西省自然科学基金项目(201901D211226)和山西省高等学校科技创新项目(2019L0525)资助 |
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| 中文摘要: |
| 开发高效的非贵金属氧还原(ORR)催化剂是促进燃料电池的商业化进程的关键。本研究利用超重力技术制备了一种优良的非贵金属ORR催化剂Co-N-CNTs。物理表征表明,通过超重力技术可以使作为活性位点的金属Co纳米颗粒均匀的分布在Co-N-CNTs催化剂表面,X射线光电子能谱学(XPS)揭示了Co-N-CNTs催化剂中的N元素不仅可以和碳纳米管(CNTs)中的C元素形成吡咯氮和石墨氮,还可以形成具有更高氧还原活性的吡啶氮结构；电化学测试结果表明,通过超重力技术制备的Co-N-CNTs催化剂的起始电位和半波电位与商业Pt/C催化剂相当。而且, Co-N-CNTs催化剂展现出优良的抗甲醇性能。 |
| 英文摘要: |
| The exploitation of high-efficiency and inexpensive electrocatalysts for the oxygen reduction reaction (ORR) is of vital importance for the commercialization of fuel cells. In this study, we prepared an efficient non-precious ORR electrocatalyst via the high-gravity technology. The results of physical characterization revealed that the metal Co NPs as active sites could be uniformly dispersed on the Co-N-CNTs catalyst via the high-gravity technology. The X-ray photoelectron spectroscopy (XPS) demonstrated that that the N element in the Co-N-CNTs catalyst could not only form pyrrolic-N nitrogen and graphite-N with the C element in the carbon nanotube (CNTs), but also form pyridinic-N structures, which has already been confirmed to be acted as validly ORR active sites. The electrochemical testing results shown that the Co-N-CNTs catalyst obtained via high gravity technology is equivalent to the commercial Pt/C catalyst in terms of onset potential and half-wave potential. Moreover, the Co-N-CNTs catalyst have an excellent anti-methanol property. |
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