METALS AND METAL MATRIX COMPOSITES |
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Effect of Conductive Carbon Black and Heat Treatment on Hydrogen Production Performance of Al-Bi Composites |
CHEN Zhuo1, XIE Zhixiong1,*, XIAO Shuguang1, CHEN Qi1, DONG Shijie1,2
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1 Hubei Key Laboratory of Green Light Industrial Materials, Hubei University of Technology, Wuhan 430068, China 2 College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430023, China |
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Abstract Al-Bi-CB composites were designed by mechanical ball milling and heat treatment, the influence of conductive carbon black and heat teatment on hydrogen generation performance of Al-Bi-CB composites was studied. The morphology and structures of the composites were investigated by sanning electron microscope (SEM) and X-ray diffraction (XRD). The experiment results indicated that the composites acquired the best hydrogen production performance when the content of conductive carbon black was 5%. At the reaction temperature of 30 ℃, 1 g Al-3%Bi-5%CB composites for 5 min resulted in a hydrogen productin amount of 865 mL and the maximum hydrogen production rate was 107.15 mL·s-1. The main reasons for increased the hydrogen production and hydrogen production rate of Al-Bi composites by conductive carbon black are refined the powder particles, improved the electrical conductivity of Al-Bi composites and quickly exfoliated from the surface of the composites when in contact with water. After heat treatment of ball milled powder, the maximum hydrogen production of Al-3%Bi-1%CB increased from 220 mL·g-1 to 840 mL·g-1 in 30 min. After heat treatment, Bi which embedded in Al remelted, recrystallized and form active sites on Al surface are the main reasons for improving hydrogen production performance of the composites.
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Published: 25 October 2023
Online: 2023-10-19
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Fund:National Natural Science Foundation of China (51771071). |
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