Li Yapeng, Li Jianming, Qian Qizhu, Jin Xu, Liu Yi, Li Ziyun, Zhu Yin, Guo Yiming, Zhang Genqiang
Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 10083, China.
Small. 2021 May;17(19):e2008148. doi: 10.1002/smll.202008148. Epub 2021 Mar 26.
The low thermodynamic potential (-0.33 V) and safe by-product of N /H O, make utilizing hydrazine oxidation reaction (HzOR) to replace thermodynamically-unfavorable and kinetically-sluggish oxygen evolution reaction a promising tactic for energy-efficient hydrogen production. However, the complexity of bifunctionality increases difficulties for effective material design, thus hindering the large-scale hydrogen generation. Herein, we present the rationally designed synthesis of superhydrophilic Ni-based multicomponent arrays (Ni NCNAs) composed of 1D nanorod-confined-nanoflakes (2D), which only needs -26 mV of working potential and 47 mV of overpotential to reach 10 mA cm for HzOR and HER, respectively. Impressively, this Ni NCNA electrode exhibits the top-level bifunctional activity for overall hydrazine splitting (OHzS) with an ultralow voltage of 23 mV at 10 mA cm and a record-high current density of 892 mA cm at just 0.485 V, also achieves the high-speed hydrogen yield driven by a waste AAA battery for OHzS.
较低的热力学电位（-0.33 V）以及肼氧化反应（HzOR）产生的安全副产物，使得利用肼氧化反应取代热力学不利且动力学迟缓的析氧反应成为一种有前景的高效制氢策略。然而，双功能的复杂性增加了有效材料设计的难度，从而阻碍了大规模制氢。在此，我们展示了一种合理设计合成的超亲水镍基多组分阵列（Ni NCNAs），其由一维纳米棒限制的纳米片（二维）组成，对于HzOR和HER分别仅需-26 mV的工作电位和47 mV的过电位即可达到10 mA cm²。令人印象深刻的是，这种Ni NCNA电极在10 mA cm²时具有23 mV的超低电压，对全肼分解（OHzS）表现出顶级的双功能活性，在仅0.485 V时实现了创纪录的892 mA cm²的高电流密度，还实现了由废旧AAA电池驱动的OHzS的高速产氢。
