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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Hierarchical NiCoP nanocone arrays supported on Ni foam as an efficient and stable bifunctional electrocatalyst for overall water splitting
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Hierarchical NiCoP nanocone arrays supported on Ni foam as an efficient and stable bifunctional electrocatalyst for overall water splitting

机译：分层Nicop纳米核苷阵列，支持Ni泡沫作为一个高效稳定的双功能电催化剂，用于整体水分裂

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摘要

Design of cost-effective, highly efficient and stable bifunctional electrocatalysts for overall water splitting is necessary for renewable energy systems. In this study, NiCoP nanowire arrays grown on 3D Ni foam (NiCoP NWAs/NF) were successfully synthesized by a two-step method, which were developed as novel bifunctional electrocatalysts for evaluating in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Their special cone nanostructure and bifunctional crystal structure enable the electrocatalysts to display remarkable electrocatalytic performance and stability for OER and HER (maintained for 28 h in the long-term HER and OER stability test with slight attenuation). The electrodes have very low overpotentials of 197 mV and 370 mV for HER and OER in 1.0 M KOH at a high current density of 100 mA cm(-2), respectively. All the merits can be attributed to several parameters: the inherent nature of transition metal phosphides, the presence of a bimetal synergetic effect, special morphology design, and the formation of "secondary" electrocatalysts on the surface of NiCoP. Meanwhile, the excellent bifunctional electrocatalysts can be developed as both anode and cathode of an alkaline electrolyzer (1.0 M KOH) which needs a cell voltage of 1.64 V to achieve 20 mA cm(-2) current density.
机译：可再生能源系统需要为整体水分裂进行成本效益，高效稳定的双功能电催化剂的设计。在该研究中，通过两步法成功地合成了在3D NI泡沫（NiCOP NWAS / NF）上生长的Nicop纳米线阵列，其作为新型双官能电催化剂进行了用于评估氢进化反应（其）和氧气进化反应（ oer）。它们的特殊锥形纳米结构和双官能晶体结构使电催化剂能够为Oer和她提供卓越的电催化性能和稳定性（在长期的她的长期保持28小时和oer稳定性测试中，轻微衰减）。电极的高电位为197mV和370mV的高电位，其在1.0M KOH中分别以100mA cm（-2）的高电流密度为1.0 m KOH。所有优点都可以归因于几个参数：过渡金属磷化物的固有性质，具有双金属协同效应，特殊形态设计的存在，以及在NiCOP表面上形成“二次”电催化剂。同时，优异的双功能电催化剂可以作为碱性电解槽（1.0M KOH）的阳极和阴极，其需要1.64V的电池电压以达到20 mAcm（-2）电流密度。

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    Li Junzhi; Wei Guodong; Zhu Yukun; Xi Yunlong; Pan Xuexue; Ji Yuan; Zatovsky Igor. V.; Han Wei;

  • 作者单位

    Jilin Univ Coll Phys Jilin Supercapacitor Engn Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Phys Jilin Supercapacitor Engn Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Phys Jilin Supercapacitor Engn Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Phys Jilin Supercapacitor Engn Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Phys Jilin Supercapacitor Engn Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Phys Jilin Supercapacitor Engn Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Phys Jilin Supercapacitor Engn Lab Changchun 130012 Peoples R China;

    Jilin Univ Coll Phys Jilin Supercapacitor Engn Lab Changchun 130012 Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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