当前位置：
X-MOL 学术
›
Adv. Funct. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Laser Assisted Solution Synthesis of High Performance Graphene Supported Electrocatalysts
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-06-25 , DOI: 10.1002/adfm.202001756 Yudong Peng 1 , Jianyun Cao 1, 2 , Jie Yang 2, 3 , Wenji Yang 1 , Chao Zhang 1 , Xiaohong Li 4 , Robert A. W. Dryfe 2, 3 , Lin Li 5 , Ian A. Kinloch 1, 2 , Zhu Liu 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-06-25 , DOI: 10.1002/adfm.202001756 Yudong Peng 1 , Jianyun Cao 1, 2 , Jie Yang 2, 3 , Wenji Yang 1 , Chao Zhang 1 , Xiaohong Li 4 , Robert A. W. Dryfe 2, 3 , Lin Li 5 , Ian A. Kinloch 1, 2 , Zhu Liu 1
Affiliation
|
Simple, yet versatile, methods to functionalize graphene flakes with metal (oxide) nanoparticles are in demand, particularly for the development of advanced catalysts. Herein, based on light‐induced electrochemistry, a laser‐assisted, continuous, solution route for the simultaneous reduction and modification of graphene oxide with catalytic nanoparticles is reported. Electrochemical graphene oxide (EGO) is used as starting material and electron–hole pair source due to its low degree of oxidation, which imparts structural integrity and an ability to withstand photodegradation. Simply illuminating a solution stream containing EGO and metal salt (e.g., H2PtCl6 or RuCl3) with a 248 nm wavelength laser produces reduced EGO (rEGO, oxygen content 4.0 at%) flakes, decorated with Pt (≈2.0 nm) or RuO2 (≈2.8 nm) nanoparticles. The RuO2–rEGO flakes exhibit superior catalytic activity for the oxygen evolution reaction, requiring a small overpotential of 225 mV to reach a current density of 10 mA cm−2. The Pt–rEGO flakes (10.2 wt% of Pt) show enhanced mass activity for the hydrogen evolution reaction, and similar performance for oxygen reduction reaction compared to a commercial 20 wt% Pt/C catalyst. This simple production method is also used to deposit PtPd alloy and MnOx nanoparticles on rEGO, demonstrating its versatility in synthesizing functional nanoparticle‐modified graphene materials.
中文翻译：
高性能石墨烯负载型电催化剂的激光辅助溶液合成
要求有简单但通用的用金属（氧化物）纳米粒子官能化石墨烯薄片的方法，特别是对于先进催化剂的开发。本文中，基于光诱导电化学，报道了一种激光辅助的连续溶液路线，用于同时催化纳米颗粒还原和修饰氧化石墨烯。电化学氧化石墨烯（EGO）由于其氧化程度低而被用作起始材料和电子-空穴对源，可赋予结构完整性和承受光降解的能力。只需照亮含有EGO和金属盐（例如H 2 PtCl 6或RuCl 3）的溶液流）用248 nm波长的激光产生的EGO（rEGO，氧含量4.0 at％）薄片，用Pt（≈2.0nm）或RuO 2（≈2.8nm）纳米颗粒装饰。RuO 2 -rEGO薄片对氧气析出反应显示出优异的催化活性，需要较小的225 mV过电势才能达到10 mA cm -2的电流密度。Pt-rEGO薄片（占Pt的10.2 wt％）显示出与氢气析出反应相比更高的质量活性，与市售20 wt％的Pt / C催化剂相比，其对氧还原反应的性能相似。这种简单的生产方法也可用于在rEGO上沉积PtPd合金和MnO x 纳米颗粒，证明了其在合成功能性纳米颗粒改性石墨烯材料中的多功能性。
更新日期：2020-08-08
中文翻译：
高性能石墨烯负载型电催化剂的激光辅助溶液合成
要求有简单但通用的用金属（氧化物）纳米粒子官能化石墨烯薄片的方法，特别是对于先进催化剂的开发。本文中，基于光诱导电化学，报道了一种激光辅助的连续溶液路线，用于同时催化纳米颗粒还原和修饰氧化石墨烯。电化学氧化石墨烯（EGO）由于其氧化程度低而被用作起始材料和电子-空穴对源，可赋予结构完整性和承受光降解的能力。只需照亮含有EGO和金属盐（例如H 2 PtCl 6或RuCl 3）的溶液流）用248 nm波长的激光产生的EGO（rEGO，氧含量4.0 at％）薄片，用Pt（≈2.0nm）或RuO 2（≈2.8nm）纳米颗粒装饰。RuO 2 -rEGO薄片对氧气析出反应显示出优异的催化活性，需要较小的225 mV过电势才能达到10 mA cm -2的电流密度。Pt-rEGO薄片（占Pt的10.2 wt％）显示出与氢气析出反应相比更高的质量活性，与市售20 wt％的Pt / C催化剂相比，其对氧还原反应的性能相似。这种简单的生产方法也可用于在rEGO上沉积PtPd合金和MnO x 纳米颗粒，证明了其在合成功能性纳米颗粒改性石墨烯材料中的多功能性。
京公网安备 11010802027423号