Facile fabrication of hierarchical Rh2Ir alloy nanodendrites with excellent HER performance in a broad pH range
Liu, QC (Liu, Qicheng)[ 1 ] ; Fan, C (Fan, Chuang)[ 1 ] ; Zhou, XY (Zhou, Xinyi)[ 1 ] ; Liu, JQ (Liu, Jiaqi)[ 1 ] ; Jiang, S (Jiang, Shuang)[ 1 ] ; Wang, SY (Wang, Siyuan)[ 1 ] ; Wang, XJ (Wang, Xiaojun)[ 2 ] *; Tang, YW (Tang, Yawen)[ 1 ]*（唐亚文）
[ 1 ] Nanjing Normal Univ, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Sch Chem & Mat Sci, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Peoples R China
[ 2 ] Nanjing Normal Univ, Sch Life Sci, Nanjing 210023, Peoples R China
NEW JOURNAL OF CHEMISTRY 2020,44, 21021-21025
It is a difficult and long-term task to develop highly active and stable electrocatalysts to realize efficient hydrogen evolution reaction (HER) in electrochemical water splitting. Herein, we report a facile oil-bath method to fabricate hierarchical Rh2Ir alloy nanodendrites (Rh2Ir NDs) with excellent HER performance in a broad pH range. Due to the unique branched nanostructure and rational Rh2Ir metal proportion, the developed Rh2Ir NDs exhibit superior activity and enhanced stability towards HER in a broad range of pH conditions. To deliver a current density of 10 mA cm(-2) in 1 M HClO4 and 1 M KOH, Rh2Ir NDs require overpotentials of only 12 and 9 mV, respectively. This work not only offers a high-performance electrocatalyst for electrochemical water splitting but also provides a new perspective towards the rational synthesis of hierarchical noble-metal nanodendrites.