燃料电池阴极ORR催化剂的研究
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- 英文论文题名：A study on cathodic oxygen reduction reaction catalysts in fuel cells
- 论文作者：朱红 ; 孙照楠 ; 蔡业政 ; 骆明川 ; 王芳辉
- 英文论文作者：Hong Zhu ; Zhaonan Sun ; Yezheng Cai ; Mingchuan Luo ; Fanghui Wang ; State Key Laboratory of Chemical Resource Engineering ; Institute of Modern Catalysis ; Beijing University of Chemical Technology
- 年：2016
- 作者机构：北京化工大学化工资源有效利用国家重点实验室;
- 论文关键词：燃料电池 ; 电催化 ; 氧还原反应 ; 低铂催化剂 ; 非铂催化剂
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十九分会：电化学材料
- 语种：中文
- 分类号：TM911.4;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：207k
- 原文格式：D
- 会议级别：全国
摘要
氢能质子交换膜燃料电池(H-PEMFCs)技术被认为是替代内燃机作为汽车动力源的最佳方案。实现该方案的核心条件是将H-PEMFCs中电催化剂的Pt用量降低至目前汽车尾气处理器中的水平。其中,阴极缓慢的氧还原反应(Oxygen reduction reaction,ORR)动力学是导致其过高Pt用量的主因。针对此问题,国际上形成了两种主流的解决方案:低铂ORR催化剂和非铂ORR催化剂。本课题组围绕上述两种方案开展了系列工作。在低铂ORR催化剂方面,以提高催化剂中Pt的利用率和比催化活性为目的,设计并开发了高活性的特殊结构核壳型纳米电催化剂,结合物理表征和电化学性能评价成功关联了新型催化剂的构效关系,得到了影响核壳结构催化剂ORR活性的关键因素;在此基础上,进一步开发了低Pt电催化剂的批量化制备工艺,在实验室阶段实现了克级以上脱合金核壳结构电催化剂的制备,推动了低铂催化剂在实际燃料电池中的应用进程。在非铂ORR催化剂方面,设计并构筑了过渡金属修饰聚合物的新型前驱体,通过不同的高温热解方式调控非铂催化剂中关键元素的化学态及相互作用,从而得到优异性能的非铂ORR催化剂。
Hydrogen powered proton exchange membrane fuel cells(H-PEMFCs) requires a high loadings of precious metal platinum(Pt) as the electrocatalysts to maintain its high energy output; however, the high cost and low annual production of Pt greatly hinder the commercialization of this technology. Therefore, it is imperative to develop electrocatalytic materials with high performance and low Pt usage. In order to improve the catalytic activity, stability, and low the Pt usage of electrocatalyst. Our group have designed and subsequently synthesized novel electrocatalytic nanomaterial, studied the internal correlations between structure and performance, proposed a facile synthetic route for low-Pt catalysts in large scale, and synthesized the gram-level dealloyed catalyst in laboratory, composed constituent-defined intermetallic core and closely arranged Pt atoms shell. Finally, we synthesized a new 1,1'-cobaltocenium-5,5'-bibenzimidazole polymer as catalyst precursor. Through pyrolysis, the electrocatalytic possessed high activity and stability, especially in alkaline condition.
Hydrogen powered proton exchange membrane fuel cells(H-PEMFCs) requires a high loadings of precious metal platinum(Pt) as the electrocatalysts to maintain its high energy output; however, the high cost and low annual production of Pt greatly hinder the commercialization of this technology. Therefore, it is imperative to develop electrocatalytic materials with high performance and low Pt usage. In order to improve the catalytic activity, stability, and low the Pt usage of electrocatalyst. Our group have designed and subsequently synthesized novel electrocatalytic nanomaterial, studied the internal correlations between structure and performance, proposed a facile synthetic route for low-Pt catalysts in large scale, and synthesized the gram-level dealloyed catalyst in laboratory, composed constituent-defined intermetallic core and closely arranged Pt atoms shell. Finally, we synthesized a new 1,1'-cobaltocenium-5,5'-bibenzimidazole polymer as catalyst precursor. Through pyrolysis, the electrocatalytic possessed high activity and stability, especially in alkaline condition.
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