Zhang Ling, Amiinu Ibrahim Saana, Ren Xiang, Liu Zhiang, Du Gu, Asiri Abdullah M, Zheng Baozhan, Sun Xuping
College of Chemistry, Sichuan University , Chengdu 610064, China.
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, China.
Inorg Chem. 2017 Nov 20;56(22):13651-13654. doi: 10.1021/acs.inorgchem.7b02466. Epub 2017 Nov 7.
Interface engineering has been demonstrated to be effective in promoting hydrogen evolution reaction (HER) in an alkaline solution. Herein, we report that the HER activity of a NiS nanoarray on a titanium mesh (NiS/TM) in alkaline media is greatly boosted by the electrodeposition of Ni(OH) onto NiS [Ni(OH)-NiS/TM]. Ni(OH)-NiS/TM only needs an overpotential of 90 mV to deliver 10 mA cm in 1.0 M KOH. Density functional theory calculations confirm that Ni(OH)-NiS has a lower water dissociation free energy and a more optimal hydrogen adsorption free energy than NiS.
界面工程已被证明在促进碱性溶液中的析氢反应（HER）方面是有效的。在此，我们报道，通过在NiS上进行Ni(OH)的电沉积[Ni(OH)-NiS/TM]，钛网上的NiS纳米阵列（NiS/TM）在碱性介质中的HER活性得到了极大提高。Ni(OH)-NiS/TM在1.0 M KOH中仅需90 mV的过电位就能提供10 mA cm⁻²的电流密度。密度泛函理论计算证实，与NiS相比，Ni(OH)-NiS具有更低的水解离自由能和更优的氢吸附自由能。
