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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Superaerophobic P-doped Ni(OH)(2)/NiMoO4 hierarchical nanosheet arrays grown on Ni foam for electrocatalytic overall water splitting
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Superaerophobic P-doped Ni(OH)(2)/NiMoO4 hierarchical nanosheet arrays grown on Ni foam for electrocatalytic overall water splitting

机译：超血管p掺杂的Ni（OH）（2）/ Nimoo4分层纳米纳米阵列在Ni泡沫上生长，用于电催化整体水分裂

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摘要

Transition metal (TM) oxides and hydroxides are one of the important candidates for the development of durable and low-cost electrocatalysts towards water splitting. The key issue is exploring effective methods to improve their electrocatalytic activity. Herein, we report a new type of P-doped Ni(OH)(2)/NiMoO4 hierarchical nanosheet array (abbr. P-Ni(OH)(2)/NiMoO4) grown on Ni foam (NF), which can act as a highly efficient electrocatalyst towards overall water splitting. Such a composite was obtained by a three-step preparation process. In the first two hydrothermal reactions, the crystalline Ni(OH)(2) hierarchical nanosheet arrays were grown on NF and then the low crystallinity NiMoO4 was grafted on the Ni(OH)(2) nanosheets. In the third phosphorization step, P element was doped into the composite Ni(OH)(2)/NiMoO4. Electrocatalytic experiments show that P-Ni(OH)(2)/NiMoO4 possesses a smaller overpotential (60 mV) and lower Tafel slope (130 mV dec(-1)) toward HER in 1 M KOH. When it was employed as an integrated water splitting catalyst, only a potential of 1.55 V was required to achieve a current density of 10 mA cm(-2). This catalytic activity is even better than those of electrolyzers constructed with noble metals Pt/C vertical bar IrO2. The superior electrocatalytic performance of P-Ni(OH)(2)/NiMoO4 can be attributed to the high quality of crystalline Ni(OH)(2) nanosheet arrays grown on NF, which dramatically improve the conductivity. Furthermore, the hierarchical structure not only increases the surface area and exposes more catalytically active sites, but also provides a superaerophobic surface, which helps to accelerate the release of generated bubbles. Moreover, the synergistic effects between P-Ni(OH)(2) and P-NiMoO4 efficiently promote the HER and OER processes also. This work may suggest new a way to explore TM oxide/hydroxide-based durable electrocatalysts with highly efficient electrocatalytic activities towards overall water splitting.
机译：过渡金属（TM）的氧化物和氢氧化物是耐用的和低成本的电催化剂的朝向水分解发展的重要候选者之一。问题的关键是探索有效的方法来提高自己的电催化活性。在此，我们提出一个新的P型掺杂的Ni（OH）（2）的/ NiMoO4分层纳米片阵列（缩写P-的Ni（OH）（2）/ NiMoO4）上生长的镍发泡体（NF），其可以充当对整个水分解了高效电。通过三个步骤制备方法获得这样的复合物。在头两个反应热液，结晶的Ni（OH）（2）分层纳米片阵列生长在NF，然后将低结晶度NiMoO4接枝在Ni（OH）（2）纳米片。在第三步骤磷化，P元素掺杂到复合的Ni（OH）（2）/ NiMoO4。电实验表明，P-的Ni（OH）（2）/ NiMoO4具有更小的超电势（60毫伏），降低塔菲尔斜率（130毫伏分解（-1））朝向HER在1M KOH。当它被用作一个集成的水分解催化剂，仅需要为1.55V的电势，以实现为10mA厘米（-2）的电流密度。此催化活性甚至比那些电解槽的有贵金属的Pt / C竖线IrO2构成。 P-的Ni（OH）（2）的优良性能的电/ NiMoO4可以归因于高品质的结晶的Ni（OH）上生长的NF（2）纳米片阵列，这极大地提高了电导率。此外，分层结构不仅增加了表面积并暴露出更多催化活性位点，同时也提供了superaerophobic表面，这有助于加速产生的气泡的释放。此外，P-Ni系（OH）（2）和P-NiMoO4之间的协同作用有效地促进了HER和OER还处理。这项工作可以建议新的方式来探索TM /氧化系氢氧化物耐用电催化剂朝向全面分解水高效的电催化活性。

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  • 作者

    Xi Wenguang; Yan Gang; Tan Huaqiao; Xiao Liguang; Cheng Sihang; Khan Shifa Ullah; Wang Yonghui; Li Yangguang;

  • 作者单位

    Northeast Normal Univ Fac Chem Minist Educ Key Lab Polyoxometalate Sci Changchun 130024 Peoples R China;

    Northeast Normal Univ Fac Chem Minist Educ Key Lab Polyoxometalate Sci Changchun 130024 Peoples R China;

    Northeast Normal Univ Fac Chem Minist Educ Key Lab Polyoxometalate Sci Changchun 130024 Peoples R China;

    Jilin Jianzhu Univ Coll Mat Sci &

    Engn Changchun Jilin Peoples R China;

    Northeast Normal Univ Fac Chem Minist Educ Key Lab Polyoxometalate Sci Changchun 130024 Peoples R China;

    Northeast Normal Univ Fac Chem Minist Educ Key Lab Polyoxometalate Sci Changchun 130024 Peoples R China;

    Northeast Normal Univ Fac Chem Minist Educ Key Lab Polyoxometalate Sci Changchun 130024 Peoples R China;

    Northeast Normal Univ Fac Chem Minist Educ Key Lab Polyoxometalate Sci Changchun 130024 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;无机化学;
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