Hierarchical Nanoporous V2O3 Nanosheets Anchored with Alloy Nanoparticles for Efficient Electrocatalysis
Hierarchical Nanoporous V2O3 Nanosheets Anchored with Alloy Nanoparticles for Efficient Electrocatalysis
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锚定合金纳米颗粒的分层纳米多孔 V2O3 纳米片可实现高效电催化
DOI：
10.1021/acsami.9b13305
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发表时间：
2019
影响因子：
9.5
通讯作者：
Qiu Hua-Jun
中科院分区：
文献类型：
--
作者：
Xu Haitao;Liu Li;Gao Jiaojiao;Du Peng;Fang Gang;Qiu Hua-Jun
探索低成本的双功能电催化剂用于高效水裂解仍然面临着艰巨的挑战。本文以金属离子掺杂的锌-钒（氧）氢氧化物为前驱体，发展了一种制备不同合金纳米颗粒锚定的三维分级纳米多孔V2 O3纳米片的方法。为了证明这一概念，我们通过高温还原和自由腐蚀制备了掺杂NiFe合金纳米颗粒的纳米多孔V2 O3纳米片。由于活性位点的增加、纳米多孔结构的加速传质以及V2 O3基体的金属特性，NiFe@V2O3杂化材料对析氧和析氢反应都表现出优异的电催化性能.当采用NiFe@V2O3作为双功能电极用于整体水分解时，仅需要1.56 V的电池电压就可达到10 mA cm-2。本工作为制备高效、低成本的电催化剂提供了一种普遍可行的方法。
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 V2O3nanosheets anchored with different alloy nanoparticles by adopting metal-ion-doped zinc–vanadium (oxy)hydroxides as precursors. To demonstrate this concept, we produced nanoporous V2O3nanosheets 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 V2O3matrix, the NiFe@V2O3hybrid exhibits excellent electrocatalytic performances for both oxygen and hydrogen evolution reactions. When adopting the NiFe@V2O3as a bifunctional electrode for overall water splitting, it only requires a cell voltage of 1.56 V to reach 10 mA cm–2. This work provides a general and practical way to prepare high-efficient and low-cost electrocatalysts.