Junshan Zhao^1,#, Yihan Shi^1,#, Ming Zhang¹, Liu Zhang¹, Xumei Cui¹, Xinghua Zhu², Jitong Su¹, Dandan Jing¹, Dingyu Yang^1,*

Journal of Renewable Materials, Vol.11, No.1, pp. 79-91, 2023, DOI:10.32604/jrm.2023.022030 - 10 August 2022

Abstract In this paper, the non-polluting, non-toxic, and eco-friendly material-MnO₂ electrodes were deposited on three-dimensional porous nickel (Ni) foam by linear sweep voltammetry, and the entire electrodeposition process did not require sintering of the material, which was fast and convenient while avoiding unnecessary energy consumption and thus was environmentally friendly. Scanning electron microscopy (SEM) and transmission electron microscopy were used to examine the surface and microscopic characteristics of each sample (TEM). Chronoamperometry (CA), cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS) were then used to determine the electrochemical characteristics of the manufactured samples. The More >

Xing Li^1,3, Yugo Osaka^2,*, Hongyu Huang¹, Takuya Tsujiguchi², Akio Kodama²

Journal of Renewable Materials, Vol.9, No.9, pp. 1541-1553, 2021, DOI:10.32604/jrm.2021.015514 - 23 April 2021

Abstract Sulfur dioxide (SO₂) emissions from diesel exhaust pose a serious threat to the environment and human health. Thus, desulfurization technology and the performance of desulfurization materials must be improved. In this study, MnO₂ was modified with various alkali metal ions using the impregnation method to enhance its SO₂ capture performance. The composites were characterized intensively by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, and Brunauer-Emmett-Teller theory. The SO₂ capture performance of these composites were measured via thermogravimetry, and the effect of doping with alkali metal ions on the SO₂ capture performance of MnO₂ was investigated. Results… More >