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首页> 外文期刊>RSC Advances >In situ reduction of well-dispersed nickel nanoparticles on hierarchical nickel silicate hollow nanofibers as a highly efficient transition metal catalyst
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In situ reduction of well-dispersed nickel nanoparticles on hierarchical nickel silicate hollow nanofibers as a highly efficient transition metal catalyst

机译：原位还原分散的硅酸镍中空纳米纤维上的分散良好的镍纳米粒子作为高效过渡金属催化剂

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摘要

Despite being a promising substitute for noble metals used in nanocatalysts, the inexpensive and earth-abundant transition-metal catalysts are still impractical, mainly due to their low catalytic activity and durability. Therefore, acquiring a highly active and stable transition metal catalyst is urgently desirable. In this paper, we describe a mild method for the synthesis of small-sized nickel nanoparticles (NiNPs) immobilized on hierarchical double-shell nickel silicate hollow nanofibers (NSHNFs) in a large scale. The NiNPs/NSHNFs catalysts show high catalytic activities and excellent stabilities towards the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The reduction has a pseudo-first-order rate constant of 13.21 x 10(-3) s(-1) and an activity parameter of 13.21 x 10(-3) s(-1) mg(-1), which are higher than those of the previously reported Ni-based catalysts. In particular, the NiNPs/NSHNFs catalysts can be easily separated from the solution by gravitational sedimentation owing to their unique structure. Therefore, our NiNPs/NSHNFs nanocomposites hold promise for further industrial applications as cheap and effective catalysts.
机译：尽管是纳米催化剂中使用的高贵金属的有前途的替代品，但廉价和肥沃的过渡金属催化剂仍然是不切实际的，主要是由于它们的催化活性和耐久性低。因此，迫切希望获得高活性和稳定的过渡金属催化剂。在本文中，我们描述了一种以大规模的分层双壳硅酸镍中空纳米纤维（NSHNFS）固定在固定在分层双壳镍硅酸镍中空纳米纤维（NSHNFS）上的小尺寸镍纳米颗粒（NINP）的温和方法。 NINPS / NSHNFS催化剂显示出高催化活性和朝向4-硝基苯酚（4-NP）至4-氨基苯酚（4-AP）的优异稳定性。减少具有13.21×10（-3）S（-1）的伪一阶速率常数，以及13.21×10（-3）S（-1）mg（-1）的活性参数，其更高比先前报道的基于Ni的催化剂。特别地，由于其独特的结构，通过重力沉降可以容易地与溶液容易地分离出肠/ NSHNFS催化剂。因此，我们的NINPS / NSHNFS纳米复合材料占据了进一步的工业应用，如廉价且有效的催化剂。

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  • 来源
    《RSC Advances》 |2016年第39期|共6页
  • 作者

    Yang Yang; Jin Renxi; Zhao Shuo; Liu Jihong; Li Yunfeng; Yu Xiaodan; Shi Zhan; Xing Yan;

  • 作者单位

    NE Normal Univ Dept Chem Jilin Prov Key Lab Adv Energy Mat Changchun 130024 Peoples R China;

    NE Normal Univ Dept Chem Jilin Prov Key Lab Adv Energy Mat Changchun 130024 Peoples R China;

    Carnegie Mellon Univ Dept Chem 4400 5th Ave Pittsburgh PA 15213 USA;

    NE Normal Univ Dept Chem Jilin Prov Key Lab Adv Energy Mat Changchun 130024 Peoples R China;

    NE Normal Univ Dept Chem Jilin Prov Key Lab Adv Energy Mat Changchun 130024 Peoples R China;

    NE Normal Univ Dept Chem Jilin Prov Key Lab Adv Energy Mat Changchun 130024 Peoples R China;

    Jilin Univ State Key Lab Inorgan Synth &

    Preparat Chem Changchun 130012 Peoples R China;

    NE Normal Univ Dept Chem Jilin Prov Key Lab Adv Energy Mat Changchun 130024 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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