Design of Ultrathin Pt‐Based Multimetallic Nanostructures for Efficient Oxygen Reduction Electrocatalysis,Small

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Design of Ultrathin Pt‐Based Multimetallic Nanostructures for Efficient Oxygen Reduction Electrocatalysis
Small ( IF 13.0 ) Pub Date : 2017-11-08 , DOI: 10.1002/smll.201702156
Jianping Lai _{1,

2} , Shaojun Guo _{1,

2,

3}

Affiliation

Nanocatalysts with high platinum (Pt) utilization efficiency are attracting extensive attention for oxygen reduction reactions (ORR) conducted at the cathode of fuel cells. Ultrathin Pt‐based multimetallic nanostructures show obvious advantages in accelerating the sluggish cathodic ORR due to their ultrahigh Pt utilization efficiency. A focus on recent important developments is provided in using wet chemistry techniques for making/tuning the multimetallic nanostructures with high Pt utilization efficiency for boosting ORR activity and durability. First, new synthetic methods for multimetallic core/shell nanoparticles with ultrathin shell sizes for achieving highly efficient ORR catalysts are reviewed. To obtain better ORR activity and stability, multimetallic nanowires or nanosheets with well‐defined structure and surface are further highlighted. Furthermore, ultrathin Pt‐based multimetallic nanoframes that feature 3D molecularly accessible surfaces for achieving more efficient ORR catalysis are discussed. Finally, the remaining challenges and outlooks for the future will be provided for this promising research field.

中文翻译：

高效氧还原电催化超薄铂基多金属纳米结构的设计

具有高铂（Pt）利用效率的纳米催化剂正受到在燃料电池阴极进行的氧还原反应（ORR）的广泛关注。超薄的基于Pt的多金属纳米结构由于其超高的Pt利用率，在加速缓慢的阴极ORR方面显示出明显的优势。在使用湿化学技术制造/调节具有高Pt利用率的多金属纳米结构以提高ORR活性和耐久性方面提供了对最近重要发展的关注。首先，综述了用于制备具有超薄壳尺寸的多金属核/壳纳米粒子以实现高效ORR催化剂的新合成方法。为了获得更好的ORR活性和稳定性，将进一步强调具有明确结构和表面的多金属纳米线或纳米片。此外，还讨论了具有3D分子可及表面的超薄铂基多金属纳米框架，以实现更有效的ORR催化。最后，将为这个有前途的研究领域提供剩余的挑战和对未来的展望。

更新日期：2017-11-08

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