3D Self-Supported Fe-Doped Ni2P Nanosheet Arrays as Bifunctional Catalysts for Overall Water Splitting
3D Self-Supported Fe-Doped Ni2P Nanosheet Arrays as Bifunctional Catalysts for Overall Water Splitting
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3D 自支撑 Fe 掺杂 Ni2P 纳米片阵列作为整体水分解的双功能催化剂
DOI：
10.1002/adfm.201702513
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发表时间：
2017-10-05
影响因子：
19
通讯作者：
Sun, Xiaoming
中科院分区：
文献类型：
--
作者：
Li, Yingjie;Zhang, Haichuan;Sun, Xiaoming
开发高效的双功能电催化剂用于析氢反应（HER）和析氧反应（OER）对于提高整体水裂解效率至关重要，但仍然是具有挑战性的问题。本文采用水热法和原位磷化法在泡沫镍上制备了三维自支撑Fe掺杂Ni 2 P纳米片阵列，并将其作为双功能电催化剂用于水的整体裂解。合成的（Ni 0.33Fe 0.67）（2）P具有中等Fe掺杂，显示出优异的OER性能，其仅需要约230 mV的过电位就可达到50 mA cm（-2），并且比其他Fe掺入的Ni 2 P电极更有效。此外，（Ni0.33Fe0.67）（2）P具有良好的HER活性，其过电位约为214 mV，达到50 mA cm（-2）。此外，测量了分别使用（Ni 0.33Fe 0.67）（2）P电极作为阴极和阳极的碱性电解槽，其需要1.49 V的电池电压以达到10 mA cm（-2），并且显示出优异的稳定性和良好的纳米阵列结构。这种良好的性能归因于高的固有活性和超疏气表面性质。
The development of highly efficient bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is crucial for improving the efficiency of overall water splitting, but still remains challenging issue. Herein, 3D self-supported Fe-doped Ni2P nanosheet arrays are synthesized on Ni foam by hydrothermal method followed by in situ phosphorization, which serve as bifunctional electrocatalysts for overall water splitting. The as-synthesized (Ni0.33Fe0.67)(2)P with moderate Fe doping shows an outstanding OER performance, which only requires an overpotential of approximate to 230 mV to reach 50 mA cm(-2) and is more efficient than the other Fe incorporated Ni2P electrodes. In addition, the (Ni0.33Fe0.67)(2)P exhibits excellent activity toward HER with a small overpotential of approximate to 214 mV to reach 50 mA cm(-2). Furthermore, an alkaline electrolyzer is measured using (Ni0.33Fe0.67)(2)P electrodes as cathode and anode, respectively, which requires cell voltage of 1.49 V to reach 10 mA cm(-2) as well as shows excellent stability with good nanoarray construction. Such good performance is attributed to the high intrinsic activity and superaerophobic surface property.