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Plasmonic Ag/N-doped Graphene Nanoflakes as Electrocatalyst for Oxygen Reduction Reaction Enhanced by Solar Energy
ECS Journal of Solid State Science and Technology ( IF 2.2 ) Pub Date : 2020-09-28 , DOI: 10.1149/2162-8777/abba05
Zhihuan Wang 1 , Chong Gong 1 , Guofu Li 2 , Yingjie Chen 1 , Lina Sui 1 , Lifeng Dong 1, 3
Affiliation  

Plasmonic Ag nanoparticles have strong spectral absorption in ultraviolet and visible light due to unique localized surface plasmon resonance effects. Meanwhile, nitrogen-doped graphene (NG) incorporates nitrogen (N) atoms into graphene lattice through a hydrothermal process, thereby providing active oxygen reduction reaction (ORR) sites. Herein, N-doped graphene decorated with plasmonic Ag nanoparticles (Ag/NG) is synthesized and utilized as ORR catalyst. The ORR performance of Ag/NG greatly exceeds that of pure NG. Its half-wave potential is 0.86 V, exceeding that of commercial Pt/C (0.83 V). Under the AM 1.5G simulated sunlight, Ag/NG demonstrates photo-enhanced electrocatalytic performance with right shifting of onset potential and half-wave potential. In this case, the half-wave potential increases by 10 mV, while the current density also rises significantly. Therefore, the Ag/NG composite provides a potential strategy for the development of solar-enhanced electrocatalysts for fuel cells and metal-air batteries.



中文翻译:

等离子Ag/N掺杂石墨烯纳米薄片作为太阳能增强氧还原反应的电催化剂

由于独特的局部表面等离子体共振效应,等离子体银纳米粒子在紫外线和可见光下具有很强的光谱吸收。同时,氮掺杂石墨烯 (NG) 通过水热过程将氮 (N) 原子结合到石墨烯晶格中,从而提供活性氧还原反应 (ORR) 位点。在此,合成了用等离子体 Ag 纳米粒子 (Ag/NG) 装饰的 N 掺杂石墨烯,并将其用作 ORR 催化剂。Ag/NG 的 ORR 性能大大超过纯 NG。其半波电位为 0.86 V,超过商用 Pt/C (0.83 V)。在 AM 1.5G 模拟阳光下,Ag/NG 表现出光增强电催化性能,起始电位和半波电位右移。在这种情况下,半波电位增加 10 mV,同时电流密度也显着上升。因此,Ag/NG 复合材料为开发用于燃料电池和金属空气电池的太阳能增强电催化剂提供了一种潜在的策略。

更新日期:2020-09-28
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