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Cu nanowires shelled with NiFe layered double hydroxide nanosheets as bifunctional electrocatalysts for overall water splitting
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2017-07-13 00:00:00 , DOI: 10.1039/c7ee01571b Luo Yu 1, 2, 3, 4, 5 , Haiqing Zhou 5, 6, 7, 8 , Jingying Sun 5, 6, 7, 8 , Fan Qin 6, 7, 8, 9 , Fang Yu 5, 6, 7, 8 , Jiming Bao 6, 7, 8, 9 , Ying Yu 1, 2, 3, 4 , Shuo Chen 5, 6, 7, 8 , Zhifeng Ren 5, 6, 7, 8
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2017-07-13 00:00:00 , DOI: 10.1039/c7ee01571b Luo Yu 1, 2, 3, 4, 5 , Haiqing Zhou 5, 6, 7, 8 , Jingying Sun 5, 6, 7, 8 , Fan Qin 6, 7, 8, 9 , Fang Yu 5, 6, 7, 8 , Jiming Bao 6, 7, 8, 9 , Ying Yu 1, 2, 3, 4 , Shuo Chen 5, 6, 7, 8 , Zhifeng Ren 5, 6, 7, 8
Affiliation
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Developing highly active and low-cost electrocatalysts with superior durability for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is a grand challenge to produce hydrogen by electrolysis of water. Here, we report on a facile and scalable approach to fabricate highly efficient three-dimensional (3D) bulk catalysts of core–shell nanostructures, in which few-layer NiFe layered double hydroxide (LDH) nanosheets are grown on Cu nanowire cores supported on Cu foams, toward overall water splitting. Remarkably, benefiting from the 3D hierarchical nanoarchitecture with large surface areas, fast electron transport, and open-channels for effective gas release, the resulting 3D self-standing catalysts exhibit outstanding OER activity as well as excellent HER performance in an alkaline medium. Using them as bifunctional catalysts for overall water splitting, a current density of 10 mA cm−2 was achieved at a voltage of 1.54 V, and 100 mA cm−2 at 1.69 V with excellent durability, which is much better than the benchmark of IrO2(+)//Pt(−) electrodes. Our 3D core–shell electrocatalysts significantly advance the research towards large-scale practical water electrolysis.
中文翻译：
包覆有NiFe层状双氢氧化物纳米片的铜纳米线作为用于整体水分解的双功能电催化剂
对于氧析出反应（OER）和氢析出反应（HER）而言，开发具有优异耐久性的高活性，低成本电催化剂，是通过电解水生产氢的一项巨大挑战。在这里，我们报告了一种简便且可扩展的方法来制造核-壳纳米结构的高效三维（3D）本体催化剂，其中在支撑在铜上的Cu纳米线核上生长了几层NiFe层状双氢氧化物（LDH）纳米片。泡沫，使总的水分解。值得注意的是，得益于具有大表面积，快速电子传输和有效气体释放的开放通道的3D分层纳米体系结构，所得3D自立式催化剂在碱性介质中显示出出色的OER活性和出色的HER性能。-2是在1.54 V，和100mA cm的电压来实现-2 1.69 V的优异的耐久性，这是明显优于的IrO的基准2（ - ）电极（+）//铂。我们的3D核-壳型电催化剂极大地推动了大规模实用水电解的研究。
更新日期：2017-08-09
中文翻译：
包覆有NiFe层状双氢氧化物纳米片的铜纳米线作为用于整体水分解的双功能电催化剂
对于氧析出反应（OER）和氢析出反应（HER）而言，开发具有优异耐久性的高活性，低成本电催化剂，是通过电解水生产氢的一项巨大挑战。在这里，我们报告了一种简便且可扩展的方法来制造核-壳纳米结构的高效三维（3D）本体催化剂，其中在支撑在铜上的Cu纳米线核上生长了几层NiFe层状双氢氧化物（LDH）纳米片。泡沫，使总的水分解。值得注意的是，得益于具有大表面积，快速电子传输和有效气体释放的开放通道的3D分层纳米体系结构，所得3D自立式催化剂在碱性介质中显示出出色的OER活性和出色的HER性能。-2是在1.54 V，和100mA cm的电压来实现-2 1.69 V的优异的耐久性，这是明显优于的IrO的基准2（ - ）电极（+）//铂。我们的3D核-壳型电催化剂极大地推动了大规模实用水电解的研究。
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