物理化学学报 >> 2021, Vol. 37 >> Issue (9): 2009035.doi: 10.3866/PKU.WHXB202009035

所属专题: 燃料电池

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铂基空心纳米框架的合成及其在直接醇燃料电池中的应用

黄磊, Zaman Shahid, 王志同, 牛慧婷, 游波, 夏宝玉()   

  • 收稿日期:2020-09-09 录用日期:2020-10-12 发布日期:2020-10-23
  • 通讯作者: 夏宝玉 E-mail:byxia@hust.edu.cn
  • 作者简介:Dr. Bao Yu Xia is currently a full professor in the School of Chemistry and Chemical Engineering at Huazhong University of Science and Technology (HUST), China. He received his Ph.D. degree in materials science at Shanghai Jiao Tong University (SJTU) in 2010. He worked at Nanyang Technological University (NTU) from 2011 to 2016. His research involves functional materials in sustainable energy and clean environment technologies including fuel cells, batteries, and electrocatalysis
  • 基金资助:
    国家自然科学基金(22075092);华中科技大学学术前沿青年团队项目(2018QYTD15);国家青年千人计划资助

Synthesis and Application of Platinum-Based Hollow Nanoframes for Direct Alcohol Fuel Cells

Lei Huang, Shahid Zaman, Zhitong Wang, Huiting Niu, Bo You, Bao Yu Xia()   

  • Received:2020-09-09 Accepted:2020-10-12 Published:2020-10-23
  • Contact: Bao Yu Xia E-mail:byxia@hust.edu.cn
  • About author:Bao Yu Xia, Email: byxia@hust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22075092);the Program for HUST Academic Frontier Youth Team(2018QYTD15);the National 1000 Young Talents Program of China

摘要:

与其他铂基纳米晶体材料相比,铂基纳米框架催化剂因其独特的结构特征和优异的催化性能引起研究者的广泛关注。开放的空间结构设计和组分可控调制不仅提高了铂的原子利用率,而且能在减少铂消耗的同时改善其电催化活性。本文简要综述了铂基纳米框架电催化剂的最新进展。在介绍不同的铂基纳米框架制备和蚀刻策略之后,也对框架晶体的结构演变及其在醇燃料电池中氧还原反应和醇氧化反应的催化应用进行了总结。此外,基于纳米框架材料的类型、合成方法、结构形态和催化性能,对铂基纳米框架的当前存在的挑战和未来的发展前景进行了总结和展望。基于铂基纳米框架材料的改进机制和规模化制备策略,我们相信纳米框架材料将会在醇燃料电池等技术中发挥更大作用。

关键词: 燃料电池, 电催化剂, 铂合金, 纳米框架, 蚀刻

Abstract:

Although platinum (Pt)-based catalysts are suffering from high costs and limited reserves, they are still irreplaceable in a short period of time in terms of catalytic performance. Structural optimization, composition regulation and carrier modification are the common strategies to improve the activity and stability of Pt-based catalyst. Strikingly, the morphological evolution of Pt-based electrocatalyst into nanoframes (NFs) have attracted wide attention to reduce the Pt consumption and improve the electrocatalytic activity simultaneously. Contrary to Pt-based solid nanocrystalline materials, Pt-based NFs have many advantages in higher atomic utilization, open space structure and larger specific surface area, which facilitate electron transfer, mass transport and weaken surface adsorption by more unsaturated coordination sites. Here we introduce the detailed preparation strategies of Pt-based NFs with different etching methods (oxidative etching, chemical etching, galvanic replacement and carbon monoxide etching), crystal structure evolution and formation mechanism, efficient applications for oxygen reduction reaction (ORR), methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR) in direct alcohol fuel cells (DAFCs). Based on the high-efficiency atom utilization, open space structure and diverse alloy composition, Pt-based NFs exhibit superior activity, stability and anti-poisoning than commercial counterparts in the application of DAFCs. The current challenges and future development of Pt-based NFs are prospected on the type of NFs materials, synthesis and etching methods, crystal control and catalytic performance. We propose a series of improvement mechanisms of Pt-based NFs, such as small size effect, high-energy facets, Pt-skin construction and Pt-C integration, thereby weakening the molecule absorption, increasing the Pt utilization, strengthening the intrinsic stability, and alleviating the metal dissolution and support corrosion. Additionally, the scale-up synthesis of catalytic materials, membrane electrodes assembly, and development of the start-stop system and the circulation system design are essential for the commercial application of Pt-based NFs and industrial manufacturing of DAFCs. More importantly, the reaction mechanism, active site distribution and dynamic changes in the catalytic material during the catalytic reaction are crucial to further explain the maintenance and evolution of catalytic performance, which will open a window to elucidate the improvement mechanism of the catalyst in the fuel cell reactions. This review work would promote continuous upgradations and understandings on Pt-based NFs in the future development of DAFCs.

Key words: Fuel cell, Electrocatalyst, Platinum alloy, Nanoframe, Etching