Magnetron Sputtering Deposition [email protected] N–C as High-Performance Electrocatalysts for Oxygen Reduction Reaction,ACS Applied Materials & Interfaces

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Magnetron Sputtering Deposition [email protected] N–C as High-Performance Electrocatalysts for Oxygen Reduction Reaction
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1021/acsami.7b16682
Hongyang Shao ₁ , Xiaoming Zhang ₂ , Hao Huang ₃ , Kan Zhang ₁ , Menglong Wang ₁ , Cai Zhang ₁ , Yifan Yang ₁ , Mao Wen ₁ , Weitao Zheng ₁

Affiliation

The idea of a core–shell structure can promote the utilization of nonprecious metallic catalysts by enhancing their activity and stability for the oxygen reduction reaction (ORR). Developing a low-cost, high-efficiency, and high-reproducibility method for synthesizing core–shell-structured materials represents an urgent challenge. Here, we fabricate encapsulated Cu nanoparticles with nitrogen-doped onion-like graphite nanoshells ([email protected] N–C) as an efficient ORR catalyst by magnetron sputtering, in which the graphite shells grow by an in situ self-assembly process activated by the surface-catalyzed behavior with Cu nanoparticles. The results show that the CuCN-650 °C catalyst achieves the optimized [email protected] N–C structure with small-sized Cu nanoparticles and a few-layer nanoshells and exhibits excellent ORR electrocatalytic properties, including a half-wave potential and onset potential similar to those of commercial Pt/C, coupled with better stability and higher methanol tolerance than for commercial Pt/C in alkaline electrolytes. The internal Cu nanoparticles in the core–shell structure not only promote the formation of a high content of pyridinic N but also donate the electronic charges to outer N-doped C shells, and thus the synergistic effect between the encapsulated Cu nanoparticles and N-doped C shells is responsible for the excellent electrocatalytic activity for the ORR.

中文翻译：

磁控溅射沉积[电子邮件保护] N–C作为高性能的氧还原反应电催化剂

核-壳结构的想法可以通过提高非贵金属催化剂对氧还原反应（ORR）的活性和稳定性来促进其利用率。开发低成本，高效率和高重现性的方法来合成核-壳结构材料是一项迫在眉睫的挑战。在这里，我们通过磁控溅射制备具有氮掺杂洋葱状石墨纳米壳（[电子邮件保护] N–C）作为有效的ORR催化剂的包封Cu纳米颗粒，其中石墨壳通过原位自组装过程被激活Cu纳米粒子的表面催化行为。结果表明，CuCN-650°C催化剂以小尺寸的Cu纳米颗粒和几层纳米壳实现了优化的[电子邮件保护] N–C结构，并显示出优异的ORR电催化性能，包括半波电势和启动电势与商用Pt / C相似，在碱性电解液中比商用Pt / C具有更好的稳定性和更高的甲醇耐受性。核-壳结构中的内部Cu纳米颗粒不仅促进了高含量的吡啶N的形成，而且还向外部的N掺杂的C壳提供了电荷，因此，包封的Cu纳米颗粒与N掺杂之间具有协同作用C壳负责ORR的出色电催化活性。包括与商用Pt / C相似的半波电势和起始电势，以及在碱性电解液中比商用Pt / C更好的稳定性和更高的甲醇耐受性。核-壳结构中的内部Cu纳米颗粒不仅促进了高含量的吡啶N的形成，而且还向外部的N掺杂的C壳提供了电荷，因此，包封的Cu纳米颗粒与N掺杂之间具有协同作用C壳负责ORR的出色电催化活性。包括与商用Pt / C相似的半波电势和起始电势，以及在碱性电解液中比商用Pt / C更好的稳定性和更高的甲醇耐受性。核-壳结构中的内部Cu纳米颗粒不仅促进了高含量的吡啶N的形成，而且还向外部的N掺杂的C壳提供了电荷，因此，包封的Cu纳米颗粒与N掺杂之间具有协同作用C壳负责ORR的出色电催化活性。

更新日期：2017-11-17

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