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首页> 外文期刊>Applied Surface Science >In-situ growth of graphene decorated Ni_3S_2 pyramids on Ni foam for high-performance overall water splitting
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In-situ growth of graphene decorated Ni_3S_2 pyramids on Ni foam for high-performance overall water splitting

机译：石墨烯在Ni泡沫上原位生长Ni_3S_2金字塔以实现高性能的总水分解

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摘要

Rational design of high-performance electrocatalysts with low cost and large abundance is highly desirable for water splitting technology. Here we report the synthesis of Ni3S2 pyramids coated with crimped graphene (Ni3S2@G), the unique configuration of which endows Ni3S2@G with large roughness, creating much more active sites along the edges. Moreover, the coupling of graphene enhances the electrical conductivity of the nanocomposite, and thus improves the electrocatalytic activity due to synergistic effect between graphene and Ni3S2. Ni3S2@G hybrid shows outstanding performance toward both hydrogen evolution reactions (HER) and oxygen evolution reactions (OER) with low overpotentials (eta(10) = 103 mV for HER and eta(20) = 294 mV for OER) and small Tafel slope. Ni3S2@G electrode also exhibits superior full water splitting ability with a low cell voltage of 1.66 V.
机译：合理设计低成本，高丰度的高性能电催化剂是水分解技术的理想选择。在这里，我们报道了包覆有卷曲石墨烯（Ni3S2 @ G）的Ni3S2金字塔的合成，其独特的结构赋予Ni3S2 @ G较大的粗糙度，沿着边缘创建了更多的活性位。此外，石墨烯的偶联增强了纳米复合材料的电导率，并因此由于石墨烯与Ni 3 S 2之间的协同作用而改善了电催化活性。 Ni3S2 @ G杂化体显示出对氢释放反应（HER）和氧释放反应（OER）的出色表现，具有低过电势（HER的eta（10）= 103 mV，OER的eta（20）= 294 mV）和小的Tafel斜率。 Ni3S2 @ G电极还具有出色的全水分解能力，电池电压低至1.66V。

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  • 来源
    《Applied Surface Science》 |2019年第28期|772-779|共8页
  • 作者

    Yu Jing; Du Yue; Li Qianqian; Zhen Liang; Dravid Vinayak P.; Wu Jinsong; Xu Cheng-Yan;

  • 作者单位

    Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Inst Technol Shenzhen, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China;

    Northwestern Univ, Dept Mat Sci & Engn, NUANCE Ctr, Evanston, IL 60208 USA;

    Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China;

    Northwestern Univ, Dept Mat Sci & Engn, NUANCE Ctr, Evanston, IL 60208 USA;

    Northwestern Univ, Dept Mat Sci & Engn, NUANCE Ctr, Evanston, IL 60208 USA;

    Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Nickel sulphide; Graphene; Synergistic effect; Electrocatalyst; Water splitting;

    机译：硫化镍;石墨烯;协同效应;电催化剂;水分解;

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