Hierarchical NiMoP2-Ni2P with amorphous interface as superior bifunctional electrocatalysts for overall water splitting
Hierarchical NiMoP2-Ni2P with amorphous interface as superior bifunctional electrocatalysts for overall water splitting
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DOI：
10.1016/j.jmst.2020.09.046
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发表时间：
2021-06
影响因子：
10.9
通讯作者：
G. Tian;Songrui Wei;Zhan-peng Guo;Shiwei Wu;Zhong-Bo Chen;Fuming Xu;Yang Cao;Zheng Liu;
中科院分区：
文献类型：
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作者：
G. Tian;Songrui Wei;Zhan-peng Guo;Shiwei Wu;Zhong-Bo Chen;Fuming Xu;Yang Cao;Zheng Liu;
制备高效的双功能催化剂用于水的整体裂解制氢和制氧是电催化研究的一个新兴方向。在此，蒲公英状的分级NiMoP 2-Ni 2 P（纳米线/纳米颗粒）异质结构的合成用于有效的电化学水分解。在碳布上生长的NiMoP 2-Ni 2 P异质结构作为独立的集成电极表现出优异的析氧反应（OER）活性和析氢反应（HER）活性，具有低过电位（OER和HER分别为258 mV和53 mV，达到10 mA cm-2）和小Tafel斜率（OER和HER分别为45 mV dec-1和58 mV dec-1）。此外，NiMoP 2-Ni 2 P异质结构可以作为阳极和阴极催化剂，用于总水分解，在10 mA cm−2下具有1.48 V的低总电位。密度泛函理论（DFT）结合结构探针表明，非晶态非均相界面在增强催化性能中起着至关重要的作用。
Producing highly efficient bifunctional catalyst for the generation of hydrogen and oxygen through overall water splitting is an emerging direction in electrocatalysis. Herein, a dandelion-like hierarchical NiMoP2-Ni2P (nanowire/nanoparticle) heterostructure was synthesized for efficient electrochemical water splitting. The NiMoP2-Ni2P heterostructures grown on carbon cloth as a freestanding integrated electrode exhibited excellent oxygen evolution reaction (OER) activity and hydrogen evolution reaction (HER) activities with low overpotentials (258 mV and 53 mV to reach 10 mA cm−2for the OER and HER, respectively), and small Tafel slope (45 mV dec-1and 58 mV dec-1for the OER and HER, respectively). Moreover, the NiMoP2-Ni2P heterostructure can act as both anode and cathode catalysts for overall water splitting with low overall potential of 1.48 V at 10 mA cm−2. Density functional theory (DFT) combined with structural probes suggests that the amorphous heterogeneous interfaces play an essential role in enhanced catalytic performance.