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-gravitytechnology, Oxygenreduction reaction, Non-preciouselectrocatalyst, Fuelcells 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

作者	单位	E-mail
师锦华	中北大学化学工程与技术学院 太原 030000	2968828235@qq.com
吴光平	中北大学化学工程与技术学院 太原 030000	pingguangwu1989@163.com

摘要点击次数:117 全文下载次数:0 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. 查看全文查看/发表评论下载PDF阅读器 相关附件：版权转让声明书 -->