在烷烃、氧和二氧化碳存在下，采用原子层无定形Al2O3包封制备具有优异选择性吸氢性能的固态储氢材料。

IF 36.3 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2025-10-24 DOI:10.1007/s40820-025-01934-7

Fanqi Bu, Zhenyu Wang, Ali Wajid, Rui Zhai, Ting Liu, Yaohua Li, Xin Ji, Xin Liu, Shujiang Ding, Yonghong Cheng, Jinying Zhang

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引用次数: 0

摘要

高氢密度的金属氢化物为氢运输提供了很有前途的储氢途径。但对高纯度氢气的再加氢要求限制了其广泛应用。本文采用原子层沉积的方法在高活性储氢材料颗粒（MgH2-ZrTi）表面沉积了10 nm的无定形Al2O3壳层，得到MgH2-ZrTi@Al2O3，该壳层在含有不同杂质（CH4, O2， N2和CO2）的氢气气氛下具有选择性吸附H2的空气稳定性。在75%的温度下，在10%CH4 + 90%H2的气氛下，MgH2-ZrTi@10nmAl2O3吸附了约4.79 wt%的H2，吸附时间为3 h，循环5次后，动力学和密度均无衰减（容量保持~ 100%）。此外，MgH2-ZrTi@10nmAl2O3在0.1%O2 + 0.4%N2 + 99.5%H2和0.1%CO2 + 0.4%N2 + 99.5%H2的条件下，在100℃下0.5 h内分别吸附了约4wt %的H2，表明MgH2-ZrTi@10nmAl2O3在含氧和含二氧化碳的氢气气氛中都有选择性吸氢。MgH2-ZrTi@10nmAl2O3在纯氢和21%O2 + 79%N2中分别吸附和不吸附1 h的吸附和解吸曲线重叠，进一步证实了Al2O3壳层对O2和N2的成功屏蔽作用。MgH2-ZrTi@10nmAl2O3已被证明具有空气稳定性，并且在含有CH4、O2、N2和CO2的大气中具有优异的选择性吸氢性能。

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Solid–State Hydrogen Storage Materials with Excellent Selective Hydrogen Adsorption in the Presence of Alkanes, Oxygen, and Carbon Dioxide by Atomic Layer Amorphous Al2O3 Encapsulation

Highlights

Gas selective amorphous Al₂O₃ encapsulation was constructed on highly reactive MgH₂ using atomic layer deposition.
Hydrogen selective adsorption was achieved in the impure hydrogen atmosphere containing impurities (O₂, N₂, CH₄, and CO₂).
Excellent air stability with no MgO or Mg(OH)₂ generated after 3 months of air exposure was achieved.

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.