Monocrystalline platinum–nickel branched nanocages with enhanced catalytic performance towards the hydrogen evolution reaction†,Nanoscale

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Monocrystalline platinum–nickel branched nanocages with enhanced catalytic performance towards the hydrogen evolution reaction†
Nanoscale ( IF 5.8 ) Pub Date : 2018-02-12 00:00:00 , DOI: 10.1039/c7nr09116h
Zhenming Cao _{1,

2,

3,

4,

5} , Huiqi Li _{1,

2,

3,

4,

5} , Chenyang Zhan _{1,

2,

3,

4,

5} , Jiawei Zhang _{1,

2,

3,

4,

5} , Wei Wang _{5,

6,

7,

8,

9} , Binbin Xu _{1,

2,

3,

4,

5} , Fa Lu _{1,

2,

3,

4,

5} , Yaqi Jiang _{1,

2,

3,

4,

5} , Zhaoxiong Xie _{1,

2,

3,

4,

5} , Lansun Zheng _{1,

2,

3,

4,

5}

Affiliation

Single crystalline noble metal nanocages are the most promising candidates for heterogeneous catalysis due to their large specific surface area, well-defined structure and enhanced structural stability. Herein, based on the observation of an unexpected phenomenon that the alloying of Pt and transition metals by co-reduction is more preferential than the formation of pure Pt NCs, we propose a feasible one-pot strategy to synthesize a uniformly epitaxial core–shell Pt–Ni structure with a Ni-rich alloy as the core and a Pt-rich alloy as the shell. The as-prepared Pt–Ni core–shell structures are subsequently etched into monocrystalline Pt–Ni branched nanocages with the wall thickness being 2.8 nm. This unique structure exhibits excellent catalytic performance and stability for the hydrogen evolution reaction (HER) in alkaline solution which is of great significance for the energy-intensive water-alkali and chlor-alkali industry.

中文翻译：

单晶铂镍支链纳米笼，对析氢反应具有增强的催化性能†

单晶贵金属纳米笼由于具有大的比表面积，明确的结构和增强的结构稳定性而成为多相催化的最有希望的候选者。在此，基于对意外还原现象的观察，即通过共还原使Pt和过渡金属合金化比形成纯Pt NCs更优先，我们提出了一种可行的一锅策略来合成均匀外延的核-壳Pt -Ni结构，以富镍合金为核，而富铂合金为壳。制备好的Pt-Ni核-壳结构随后被刻蚀成壁厚为2.8 nm的Pt-Ni支链单晶纳米笼。

更新日期：2018-02-12

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