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Updated: Dec 23, 2025
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
High-Efficiency Oxygen Reduction to Hydrogen Peroxide Catalyzed by Nickel Single-Atom Catalysts with Tetradentate N2
Yulin Wang1,2, Run Shi1, Lu Shang1
1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
Abstract:
Carbon-supported NiII single-atom catalysts with a tetradentate Ni-N2 O2 coordination formed by a Schiff base ligand-mediated pyrolysis strategy are presented. A NiII complex of the Schiff base ligand (R,R)-(-)-N,N'-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediamine was adsorbed onto a carbon black support, followed by pyrolysis of the modified carbon material at 300 °C in Ar. The Ni-N2 O2 /C catalyst showed excellent performance for the electrocatalytic reduction of O2 to H2 O2 through a two-electron transfer process in alkaline conditions, with a H2 O2 selectivity of 96 %. At a current density of 70 mA cm-2 , a H2 O2 production rate of 5.9 mol gcat. -1 h-1 was achieved using a three-phase flow cell, with good catalyst stability maintained over 8 h of testing. The Ni-N2 O2 /C catalyst could electrocatalytically reduce O2 in air to H2 O2 at a high current density, still affording a high H2 O2 selectivity (>90 %). A precise Ni-N2 O2 coordination was key to the performance.
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