氢气储存
石墨烯
材料科学
氢
解吸
氧化物
化学工程
储能
纳米孔
氢燃料
动力学
催化作用
纳米技术
化学
热力学
吸附
冶金
物理化学
有机化学
功率(物理)
量子力学
工程类
物理
作者
Hyung Wan,HyeonJi Kim,Eun Seon Cho
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:11 (52): 32533-32540
被引量:5
摘要
With a growing concern over climate change, hydrogen offers a wide range of opportunities for decarbonization and provides a flexibility in overall energy systems. While hydrogen energy is already plugged into industrial sectors, a physical hydrogen storage system poses a formidable challenge, giving momentum for safe and efficient solid-state hydrogen storage. Accommodating such demands, sodium alanate (NaAlH4) has been considered one of the candidate materials due to its high storage capacity. However, it requires a high temperature for hydrogen desorption and becomes inactive irreversibly upon air-exposure. To enhance sluggish reaction kinetics and reduce the hydrogen desorption temperature, NaAlH4 can be confined into a porous nanoscaffold; however, nanoconfined NaAlH4 with sufficient hydrogen storage performance and competent stability has not been demonstrated so far. In this work, we demonstrate a simultaneously enhanced hydrogen storage performance and air-stability for NaAlH4 particles confined in a nanoporous graphene oxide framework (GOF). The structure of the GOF was elaborately optimized as a nanoscaffold, and NaAlH4 was infiltrated into the pores of the GOF via incipient wetness impregnation. As a result of the nanoconfinement, both the onset temperature and activation energy for hydrogen desorption of NaAlH4 are significantly decreased without transition metal catalysts, while simultaneously achieving the stability under ambient conditions.
科研通智能强力驱动
Strongly Powered by AbleSci AI