Functionalized Carbon Nanotubes with Ni(II) Bipyridine Complexes as Efficient Catalysts for the Alkaline Oxygen Evolution Reaction
Functionalized Carbon Nanotubes with Ni(II) Bipyridine Complexes as Efficient Catalysts for the Alkaline Oxygen Evolution Reaction
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DOI：
10.1021/acscatal.7b02878
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发表时间：
2017-10
期刊：
影响因子：
12.9
通讯作者：
Mohammad Tavakkoli;M. Nosek;J. Sainio;F. Davodi;T. Kallio;P. Joensuu;K. Laasonen
中科院分区：
文献类型：
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作者：
Mohammad Tavakkoli;M. Nosek;J. Sainio;F. Davodi;T. Kallio;P. Joensuu;K. Laasonen
在目前作为环境友好燃料的氢气生产技术中，水的分解越来越受到关注。然而，析氧反应(OER)的阳极过电位大、反应速度慢，严重限制了电解水的效率。为了克服这一问题，开发高效的OER电催化剂材料引起了人们的极大关注。在这里，我们展示了固定在多壁碳纳米管(MWNTs)侧壁上的有机金属镍(II)络合物作为高活性和稳定的OER电催化剂。这类电催化材料是通过将多壁碳纳米管与有机金属联吡啶(BiPy)配合物共价官能化而合成的。Ni-bipy-MWNT催化剂在0.1M和1M氢氧化钠中的过电位分别为310 mV和290 mV时产生的电流密度为10 mA cm-2，塔菲尔斜率为∼35 mV dec-1，是迄今报道的活性最高的OER电催化剂之一。不同..。
Among current technologies for hydrogen production as an environmentally friendly fuel, water splitting has attracted increasing attention. However, the efficiency of water electrolysis is severely limited by the large anodic overpotential and sluggish reaction rate of the oxygen evolution reaction (OER). To overcome this issue, the development of efficient electrocatalyst materials for the OER has drawn much attention. Here, we show that organometallic Ni(II) complexes immobilized on the sidewalls of multiwalled carbon nanotubes (MWNTs) serve as highly active and stable OER electrocatalysts. This class of electrocatalyst materials is synthesized by covalent functionalization of the MWNTs with organometallic Ni bipyridine (bipy) complexes. The Ni-bipy-MWNT catalyst generates a current density of 10 mA cm–2 at overpotentials of 310 and 290 mV in 0.1 and 1 M NaOH, respectively, with a low Tafel slope of ∼35 mV dec–1, placing the material among the most active OER electrocatalysts reported so far. Different ...