1. 3D-Graphite Felt Self-loaded Rich Co3O4 Nanoparticle Electrodes for Chlorine Evolution Reaction at Low Concentration Chloride Ion.
- Author
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Wang, Zihui, Yuan, Qinbo, Li, Yu, Zhou, Xianxian, Liu, Xiaoxiao, Yang, Huazhao, Zhang, Zhonglin, Duan, Donghong, and Liu, Shibin
- Subjects
CHLORIDE ions ,NANOPARTICLES ,BODIES of water ,CHLORINE ,CATALYTIC activity ,ELECTRODES - Abstract
To investigate a highly active catalyst for CER and explore low concentrations of Cl
− electrocatalytic product Cl2 , Co3 O4 /GF catalysts were constructed by a methanesulfonic acid system plating and calcination process. SEM shows Co3 O4 /GF-0.1 has a uniform distribution of nanoparticles. TEM, XRD, and XPS results confirmed the formation of Co3 O4 . The catalytic activity in high concentrations of Cl− and low concentrations of Cl− are discussed. LSV suggests Co3 O4 /GF-0.1 with an initial potential of 1.06 V, The overpotential at a current density of 10 mA cm−2 is 232 m V, Tafel slope 109.26 mV dec−1 , the CER reaction order is 0.54 at 1, 2 and 3 M NaCl, and 0.18 at 4, 5 and 6 M NaCl, too high concentration of Cl− slow down control of speed. In low concentration solution, the CER reaction order is 0.99, which can achieve the degradation rate of 90.8% in 50 ppm ammonia nitrogen. The apparent constant and the concentration of Cl− conform to the equation K = 1.44 × 10–3 C0 0.95 . From low concentration to high concentration, energy consumption decreased, and Faraday efficiency increased. Electrode with jECSA = 0.52 mA cm−2 , 3D structure GF has a large specific active area that promotes the diffusion of Cl− . This work provides analysis methods and ideas for the preparation of the high activity and stability CER catalyst at low Cl− concentrations in the actual water body. [ABSTRACT FROM AUTHOR]- Published
- 2024
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