Low-loading Pt nanoparticles embedded on Ni, N-doped carbon as superior electrocatalysts for oxygen reduction,Catalysis Science & Technology

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Low-loading Pt nanoparticles embedded on Ni, N-doped carbon as superior electrocatalysts for oxygen reduction
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2019-11-27 , DOI: 10.1039/c9cy01654f
Xinliang Wang _{1,

2,

3,

4,

5} , Shaoxuan Yang _{1,

2,

3,

4,

5} , Yihuan Yu _{1,

2,

3,

4,

5} , Meiling Dou _{1,

2,

3,

4,

5} , Zhengping Zhang _{1,

2,

3,

4,

5} , Feng Wang _{1,

2,

3,

4,

5}

Affiliation

As one of the efficient and classic nanoscale catalysts, Pt nanoparticles play predominant roles in multiple energy conversion systems, especially for electrochemical devices involving the oxygen reduction reaction (ORR). It is important to develop a scalable method for synthesis of more efficient Pt-based electrocatalysts with higher activity and stability. In this work, a low-loading Pt-based electrocatalyst (8.0 wt%) is fabricated by the galvanic replacement reaction, presenting well-dispersed Pt nanoparticles adjacent to atomic Ni–N–C complexes (Pt@NiNC). Due to the synergetic effect associated with the nanoscale/atomic scale joint active sites and the strong metal–support interaction, the resulting Pt@NiNC hybrid exhibits better ORR performance and higher mass activity than the benchmark Pt/C, as well as enhanced electrochemical stability. This research not only opens a new route to develop heterogeneous catalysts with multi-scale joint sites but also provides bright prospects for high-performance and low-cost energy conversion and storage.

中文翻译：

嵌入Ni，N掺杂的碳上的低负载Pt纳米颗粒是用于氧还原的高级电催化剂

作为高效和经典的纳米级催化剂之一，Pt纳米粒子在多种能量转换系统中起着主要作用，特别是对于涉及氧还原反应（ORR）的电化学装置。重要的是开发一种可扩展的方法来合成具有更高活性和稳定性的更有效的Pt基电催化剂。在这项工作中，通过电流置换反应制备了低负荷的Pt基电催化剂（8.0 wt％），呈现出与原子Ni–N–C络合物（Pt @ NiNC）相邻的分散良好的Pt纳米颗粒。由于与纳米级/原子级联合活性位点相关的协同效应以及强大的金属-载体相互作用，所得的Pt @ NiNC杂化物比基准Pt / C表现出更好的ORR性能和更高的质量活性，并增强了电化学稳定性。

更新日期：2019-11-27

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