Abstract
It is of great importance to develop high-performance electrocatalysts in promoting hydrous hydrazine as a viable fuel. Herein, we report the synthesis of 3D porous superaerophobic Ni-Zn/RGO by bubble dynamic template method. The prepared porous Ni-Zn/RGO displays outstanding electrocatalytic activity with excellent stability towards hydrazine electrooxidation. For example, a current density of 469 mA cm−2 at 0.30 V vs RHE, a retention rate of 92.6% after 5000 s and almost 100% selectivity towards the complete hydrazine oxidation can be achieved for Ni-Zn/RGO, which is at the top level among the reported electrocatalysts for hydrazine oxidation up to now. The mechanistic reason for the enhanced catalytic performance of Ni-Zn/RGO was discussed, which is primarily attributed to its active center of Ni electron richer, the large ESA, high electrical conductivity, and most importantly, the superaerophobic surface structure induced by the combining with RGO and its 3D porous architecture, hence enhancing the intrinsic activity and the number of active sites. It is believed that the prepared Ni-Zn/RGO catalyst has a potential application in hydrazine electrooxidation.
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