Ni2V2O7 dandelion microsphere for a high-performance electrocatalyst in water splitting. (18th November 2021)

• Record Type: Journal Article
• Authors: Yang, Zhou; Fan, Wangxi; Zhang, Pengfei; Zhuang, Haiyu; Xiang, Meng; Hui, Jia
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 80(2021)
• Page Start: 39658
• Page End: 39664
• Publication Date: 2021-11-18
• Subjects: Dandelion microsphere -- Ni2V2O7 -- Water splitting -- Large specific surface area; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.09.237
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Water splitting is an effective way to produce hydrogen to solve the energy crisis problem, and inorganic metal compounds are widely used in electrocatalysis field due to efficient hydrogen evolution reaction (HER). Herein, we synthesize Ni2 V2 O7 dandelion microsphere from nickel nitrate and vanadium pentoxide by "one-step hydrothermal" way, which exhibits large specific surface area of 102.74 m 2 g −1 . The as-prepared Ni2 V2 O7 microsphere shows good electrocatalysis performances including OER overpotential of 358 mV and good stability, as well as HER overpotential of 195 mV. Furthermore, the Ni2 V2 O7 microsphere electrode is assembled to Ni2 V2 O7 microsphere//Ni2 V2 O7 microsphere system, showing the water splitting voltage of 1.50 V at 10 mA cm −2 by two-electrode method, which is much lower than those of commercial RuO2 //Pt/C system and most of spinel oxides electrocatalysts. Our work opens up a new and facile avenue for fabricating inorganic microsphere electrocatalyst in hydrogen production field. Highlights: Ni2 V2 O7 dandelion microsphere is firstly synthesized by one-step hydrothemal way. The Ni2 V2 O7 microsphere has large specific surface area of 102.74 m 2 g −1 . The large ECSA of Ni2 V2 O7 provides many active sites for water splitting. The Ni2 V2 O7 microsphere system shows the low water splitting voltage of 1.50 V.