Publication | Closed Access
Highly Branched Metal Alloy Networks with Superior Activities for the Methanol Oxidation Reaction
265
Citations
36
References
2017
Year
Three-dimensional (3D) interconnected metal alloy nanostructures possess superior catalytic performance owing to their advantageous characteristics, including improved catalytic activity, corrosion resistance, and stability. Hierarchically structured Ni-Cu alloys composed of 3D network-like microscopic branches with nanoscopic dendritic feelers on each branch were crafted by a facile and efficient hydrogen evolution-assisted electrodeposition approach. They were subsequently exploited for methanol electrooxidation in alkaline media. Among three hierarchically structured Ni-Cu alloys with different Ni/Cu ratios (Ni<sub>0.25</sub> Cu<sub>0.75</sub> , Ni<sub>0.50</sub> Cu<sub>0.50</sub> , and Ni<sub>0.75</sub> Cu<sub>0.25</sub> ), the Ni<sub>0.75</sub> Cu<sub>0.25</sub> electrode exhibited the fastest electrochemical response and highest electrocatalytic activity toward methanol oxidation. The markedly enhanced performance of Ni<sub>0.75</sub> Cu<sub>0.25</sub> eletrocatalyst can be attributed to its alloyed structure with the proper Ni/Cu ratio and a large number of active sites on the surface of hierarchical structures.
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