A high-performance ternary ferrite-spinel material for hydrogen storage via chemical looping redox cycles. (13th January 2020)

• Record Type: Journal Article
• Authors: Zeng, Dewang; Li, Min; Qiu, Yu; Ma, Li; Cui, Dongxu; Zhang, Shuai; Xiao, Rui
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 3(2020)
• Page Start: 2034
• Page End: 2043
• Publication Date: 2020-01-13
• Subjects: Ternary ferrite materials -- Synergic effects -- Chemical looping -- Hydrogen production; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.11.021
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Chemical looping has been proposed as an emerging technology for large-scale hydrogen storage with the advantages of high volumetric hydrogen storage density, environmental compatibility, and safety. However, to ensure sufficient redox activity, conventional oxygen carrier materials must be operated at a temperature higher than 800 °C, leading to the rapid deterioration on the storage capacity over several cycles. In this work, we report a ternary ferrite-spinel material Cu0.5 Co0.5 Fe2 O4 for chemical looping hydrogen storage and production. The material exhibits high volumetric hydrogen storage density (65.58 g·L −1 ) and average hydrogen production rate (142 μmol·g −1 ·min −1 ) at 550 °C. The performance is maintained with negligible deactivation over repetitive redox cycles. The high performance can be attributed to the ability of Cu and Co to improve the reduction and the reversible phase change during the oxidation stage at moderate temperatures. The performance of the Cu0.5 Co0.5 Fe2 O4 is comparable to the state-of-the-art Rh-FeOx containing rare earth metals, which enables its potential in industry application. Highlights: Cu0.5 Co0.5 Fe2 O4 exhibits high reduction level. Cu0.5 Co0.5 Fe2 O4 displays high reversibility of phase changes. High hydrogen storage and production performances are showed at intermediate temperature.