Highly efficient catalytic CoS1.097 embedded in biomass nanosheets for oxygen evolution reaction. (24th January 2020)

• Record Type: Journal Article
• Authors: Wang, He; Chang, Fangfang; Gu, Jiali; Xie, Xiaoxiao; Chen, Huifeng; Bai, Zhengyu; Yang, Lin; Yang, Xiaoli
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 4(2020)
• Page Start: 2765
• Page End: 2773
• Publication Date: 2020-01-24
• Subjects: Flower-like structure -- CoS1.097-B nanosheets -- Oxygen evolution reaction; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.11.170
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: At present, the preparation of highly active, long-term durable, and low cost electrocatalysts toward oxygen evolution reaction is still a challenge for energy conversion and storage. This work reports CoS1.097 embedded in flower-like biomass derived from red blood cells (RBCs) nanocatalyst, was synthesized via a one-step, hydrothermal method. Compared to pure CoS1.097 microspheres, the generated flower-like CoS1.097 -biomass (CoS1.097 -B) nanosheets exhibits enhanced OER electrocatalytic activity with a onset potential of 1.43 V (vs. RHE), an overpotential of 260 mV at the current density of 10 mA cm −2, and a low Tafel slope of 83 mV dec −1 . Moreover, the CoS1.097 -B displays good OER stability with little decrease after 400 cycles. Our work provides a reference for designing catalysts with high activity and good stability using biomass under mild conditions. Graphical abstract: Image 1 Highlights: Novel synthesis of CoS1.097 embedded in flower-like biomass nanocatalysts. More exposed CoS1.097 particles impart large active area. The CoS1.097 -B exhibits excellent activity and stability towards OER. The CoS1.097 -B requires an overpotential of 260 mV to reach a current density of 10 mA cm −2 . The Tafel slope of CoS1.097 -B is only 83 mV dec −1 .