Hierarchical Nanoporous V<sub>2</sub>O<sub>3</sub> Nanosheets Anchored with Alloy Nanoparticles for Efficient Electrocatalysis

Published on 2019-10-09T16:44:07Z (GMT) by
Exploring low-cost bifunctional electrocatalysts for efficient water splitting still faces arduous challenges. Herein, a general and straightforward method is developed to prepare 3D hierarchical nanoporous V<sub>2</sub>O<sub>3</sub> nanosheets anchored with different alloy nanoparticles by adopting metal-ion-doped zinc–vanadium (oxy)­hydroxides as precursors. To demonstrate this concept, we produced nanoporous V<sub>2</sub>O<sub>3</sub> nanosheets dotted with NiFe alloy nanoparticles through high-temperature reduction and free corrosion. Due to the increased number of active sites, accelerated mass transfer originating from the designed nanoporous architecture, and the metallic property of the V<sub>2</sub>O<sub>3</sub> matrix, the NiFe@V<sub>2</sub>O<sub>3</sub> hybrid exhibits excellent electrocatalytic performances for both oxygen and hydrogen evolution reactions. When adopting the NiFe@V<sub>2</sub>O<sub>3</sub> as a bifunctional electrode for overall water splitting, it only requires a cell voltage of 1.56 V to reach 10 mA cm<sup>–2</sup>. This work provides a general and practical way to prepare high-efficient and low-cost electrocatalysts.

Cite this collection

Xu, Haitao; Liu, Li; Gao, Jiaojiao; Du, Peng; Fang, Gang; Qiu, Hua-Jun (2019): Hierarchical

Nanoporous V2O3 Nanosheets Anchored with Alloy

Nanoparticles for Efficient Electrocatalysis. ACS Publications. Collection. https://doi.org/10.1021/acsami.9b13305