Active nano-CuPt₃ electrocatalyst supported on graphene for enhancing reactions at the cathode in all-vanadium redox flow batteries

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• 作者：Cristina Flox^a ; ^{cflox@irec.cat} ; Javier Rubio-Garcia^a ; Raquel Nafria^a ; Reza Zamani^a ; ^b ; Marcel Skoumal^a ; Teresa Andreu^a ; Jordi Arbiol^b ; ^c ; Andreu Cabot^a ; ^d ; Joan Ramon Morante^a ; ^d
• 刊名：Carbon
• 出版年：2012
• 期刊代码：10_00086223
• 类别：ms
• 出版时间：May, 2012
• 卷：50
• 期：6
• 页码：2372-2374
• 文件大小：462 K

摘要

Graphene-supported monometallic (Pt) and bimetallic (CuPt₃) cubic nanocatalysts have been investigated as new positive electrode materials for improving the VO₂⁺/VO²⁺ redox process occurring in the vanadium redox flow batteries (VRB). High-resolution transmission electron microscopy (HRTEM) and scanning electron microscopy (SEM) have been employed to characterize the electrodes. The presence of the CuPt₃ nanocubes on graphene conferred higher electrocatalytic activity due to the much higher electroactive area compared to that obtained with the Pt nanoparticles. The electrochemical surface area of the nano-(CuPt₃)-decorated graphene electrode was 105%higher compared to non-decorated graphene, being then a promising alternative for improving the VRB.