NiIr Nanowire Assembles as an Efficient Electrocatalyst Towards Oxygen Evolution Reaction in Both Acid and Alkaline Media.

Autor: Zhang N; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243002, P.R. China.; School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, P.R. China., Wang Y; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243002, P.R. China., Wu R; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243002, P.R. China., Yang X; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243002, P.R. China., Wu Y; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243002, P.R. China., Wang F; School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, P.R. China., Cui P; School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui, 243002, P.R. China., Liu G; School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, P.R. China., Jiang W; School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, P.R. China., Xie H; Hangzhou Yanqu Information Technology Co., Ltd., Hangzhou, Zhejiang, 310003, P.R. China.
Jazyk: angličtina
Zdroj: Chemistry, an Asian journal [Chem Asian J] 2025 Jan 02; Vol. 20 (1), pp. e202400851. Date of Electronic Publication: 2024 Nov 07.
DOI: 10.1002/asia.202400851
Abstrakt: Oxygen evolution reaction (OER) is the rate-limiting step in water electrolysis due to its sluggish kinetic, and it is challenging to develop an OER catalyst that could work efficiently in both acid and alkaline environment. Herein, NiIr nanowire assembles (NAs) with unique nanoflower morphology were prepared by a facile hydrothermal method. As a result, the NiIr NAs exhibited superior OER activity in both acid and alkaline media. Specifically, in 0.1 M HClO 4 , NiIr NAs presented a superior electrocatalytic performance with a low overpotential of merely 242 mV at 10 mA cm -2 and a Tafel slope of only 58.1 mV dec -1 , surpassing that of commercial IrO 2 and pure Ir NAs. And it achieved a significantly higher mass activity of 148.40 A/g at -1.5 V versus RHE. In 1.0 M KOH, NiIr NAs has an overpotential of 291 mV at 10 mA cm -2 and a Tafel slope of 42.1 mV dec -1 . Such remarkable activity makes the NiIr NAs among the best of recently reported representative Ir-based OER electrocatalysts. Density functional theory (DFT) calculations confirmed alloying effect promotes surface bonding of NiIr with oxygen-containing reactants, resulting in excellent catalytic properties.
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
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