Hao Weiju, Liang Rikai, Liang Shiheng, Liu Bonan, Qian Yunlong, Ji Ding-Kun, Li Guisheng
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, P. R. China.
Institute of Molecular Medicine (IMM), Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200240, China.
Small. 2023 Nov;19(48):e2304258. doi: 10.1002/smll.202304258. Epub 2023 Jul 31.
How to mildly structure a high intrinsic activity and stable catalytic electrode to realize long-term catalytic water splitting to produce hydrogen at a wide range of pH values at industrial high current is a challenge. Herein, this work creatively proposes to prepare industrial-grade catalytic electrodes with high efficiency and stability at high current density through carbon quantum dots (CDs) modification nickel sulfide on hydrophilic flexible filter paper via one-step mild chemical plating (denoted as CDs-Ni S @HFP). The intrinsic activity and surface area, electron transfer ability, and corrosion resistance of Ni S material are increased due to the regulation, homogenous, and high concentration doping of CDs. The overpotential of the flexible catalytic electrode is only 30, 35, and 87 mV in 1 m KOH, simulated seawater (1 m KOH + 0.5 m NaCl), and neutral electrolyte (0.5 m PBS) at a current density of 10 mA cm . More attractively, the CDs-Ni S @HFP electrode achieves over 500 h of efficient and stable catalysis at industrial high current density (500 mA cm ). Due to the advantages of mild, universal, and large-area preparation of catalytic materials, this work provides technical support for flexible catalytic electrodes in efficient catalysis toward water splitting, energy storage, and device preparation.
