Direct Synthesis of Intermetallic Platinum-Alloy Nanoparticles Highly-Loaded on Carbon Supports for Efficient Electrocatalysis,Journal of the American Chemical Society

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Direct Synthesis of Intermetallic Platinum-Alloy Nanoparticles Highly-Loaded on Carbon Supports for Efficient Electrocatalysis
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-07-27 , DOI: 10.1021/jacs.0c05140
Tae Yong Yoo _{1,

2} , Ji Mun Yoo _{1,

2} , Arun Kumar Sinha _{1,

2} , Megalamane S Bootharaju _{1,

2} , Euiyeon Jung _{1,

2} , Hyeon Seok Lee _{1,

2} , Byoung-Hoon Lee _{1,

2} , Jiheon Kim _{1,

2} , Wytse Hooch Antink _{1,

2} , Yong Min Kim _{1,

2} , Jongmin Lee _{1,

2} , Eungjun Lee _{2,

3} , Dong Wook Lee _{3,

4} , Sung-Pyo Cho ₅ , Sung Jong Yoo _{3,

6,

7} , Yung-Eun Sung _{1,

2} , Taeghwan Hyeon _{1,

2}

Affiliation

Compared to nanostructured platinum (Pt) catalysts, ordered Pt-based intermetallic nanoparticles supported on a carbon substrate exhibit much enhanced catalytic performance, especially in fuel cell electrocatalysis. However, direct synthesis of homogeneous intermetallic alloy nanocatalysts on carbonaceous supports with high loading is still challenging. Herein, we report a novel synthetic strategy to directly produce highly dispersed MPt alloy nanoparticles (M = Fe, Co, or Ni) on various carbon supports with high catalyst loading. Importantly, a unique bimetallic compound, composed of [M(bpy)3]2+ cation (bpy = 2,2'-bipyridine) and [PtCl6]2- anion, evenly decomposes on carbon surface and forms uniformly sized intermetallic nanoparticles with a nitrogen-doped carbon protection layer. The excellent oxygen reduction reaction (ORR) activity and stability of the representative reduced graphene oxide (rGO)-supported L10-FePt catalyst (37 wt %-FePt/rGO), exhibiting 18.8 times higher specific activity than commercial Pt/C catalyst without degradation over 20 000 cycles, well demonstrate the effectiveness of our synthetic approach toward uniformly alloyed nanoparticles with high homogeneity.

中文翻译：

在碳载体上直接合成高负载金属间铂合金纳米颗粒以实现高效电催化

与纳米结构的铂 (Pt) 催化剂相比，负载在碳基底上的有序 Pt 基金属间化合物纳米颗粒表现出大大增强的催化性能，尤其是在燃料电池电催化中。然而，在高负载量的碳质载体上直接合成均质金属间合金纳米催化剂仍然具有挑战性。在此，我们报告了一种新的合成策略，可在具有高催化剂负载量的各种碳载体上直接生产高度分散的 MPt 合金纳米粒子（M = Fe、Co 或 Ni）。重要的是，一种独特的双金属化合物，由 [M(bpy)3]2+ 阳离子（bpy = 2,2'-联吡啶）和 [PtCl6]2- 阴离子组成，在碳表面均匀分解并形成大小均匀的金属间纳米粒子氮掺杂碳保护层。

更新日期：2020-07-27

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