Trimetallic PtRhNi alloy nanoassemblies as highly active electrocatalyst for ethanol electrooxidation
cyanogel, trimetallic alloy, electrocatalysis, activity, ethanol oxidation reaction
ABSTRACT Although nanostructures based on noble metal alloys are widely utilized in (electro)catalysis, their low-temperature synthesis remains an enormous challenge due to the different Nernst equilibrium potentials of metal precursors. Herein, we describe the successful synthesis of trimetallic PtRhNi alloy nanoassemblies (PtRhNi-ANAs) with tunable Pt/Rh ratios using a simple mixed cyanogel reduction method and provide a detailed characterization of their chemical composition, morphology, and structure. Additionally, the electrochemical properties of PtRhNi-ANAs are examined by cyclic voltammetry, revealing compositiondependent electrocatalytic activity in the ethanol oxidation reaction (EOR). Compared to a commercial Pt black electrocatalyst, optimized Pt3Rh1Ni2-ANAs display remarkably enhanced EOR electrocatalytic performance in alkaline media.
Tsinghua University Press
Huimin Liu,Jiahui Li,Lijuan Wang,Yawen Tang,Bao Yu Xia,Yu Chen, Trimetallic PtRhNi alloy nanoassemblies as highly active electrocatalyst for ethanol electrooxidation. NanoRes.2017, 10(10): 3324–3332