Ni2P@carbon core-shell nanorod array derived from ZIF-67-Ni: Effect of phosphorization temperature on morphology, structure and hydrogen evolution reaction performance

作者：He, Suqi; He, Suyu; Gao, Feng; Bo, Xin; Wang, Qingxiang^*; Chen, Xianjue; Duan, Jingjing; Zhao, Chuan^*

来源：Applied Surface Science, 2018, 457: 933-941.

DOI：10.1016/j.apsusc.2018.07.033

• Metal-organic frameworks
• Nickel phosphide
• Electrocatalyst
• Hydrogen evolution reaction

MOFs attracted considerable attention as morphology templates and constitution precursors for synthesis of multiple functional nanocomposites due to their diverse and robust framework structure. In this work, a nickel-phosphide@carbon (Ni2P@C) composite with unique nanorod array morphology was synthesized via a facile phosphorization process using Ni(II)-zeolitic imidazolate framework-67 (ZIF-67-Ni) as the precursor. And the effect of phosphorization temperature on the morphology and structure of the products were carefully investigated. The products obtained under different phosphorization temperature were utilized as electrocatalysts for hydrogen evolution reaction (HER). The results showed that Ni2P@C nanorod array achieved under the phosphorization temperature of 400 degrees C demonstrated the highest electrocatalytic activity toward HER in 0.5 M sulfuric acid solution with a low overpotential of 186 mV at the current density of 10 mA cm(-2). Also, high catalytic durability and chemical stability of the Ni2P@C nanorod array for HER were achieved. Combing the morphology and structure characterization experiments, the reason for high HER performance of Ni2P@C nanorod array obtained at the phosphorization temperature of 400 degrees C was discussed. This work provides a new guidance for the synthesis of high-performance MOFs-derived electrocatalyst for electrochemical HER.

• 出版日期2018-11-1
• 单位闽南师范大学