Kubo Masaru, Matsumoto Tomoki, Shimada Manabu
Department of Advanced Science and Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University, Kagamiyama 1-4-1, Higashi-Hiroshima 739-8527, Hiroshima, Japan.
Materials (Basel). 2023 Aug 2;16(15):5416. doi: 10.3390/ma16155416.
We prepared HKUST-1 (CuBTC; BTC = 1,3,5-benzenetricarboxylate) using a spray synthesis method with Li doping and defect created via partial replacement of HBTC with isophthalic acid (IP) to enhance the H adsorption capacity. Li-doping was performed by incorporating LiNO in HKUST-1 via spray synthesis and subsequent thermal treatment for decomposing NO, which enhances H uptake at 77 K and 1 bar per unit mass and per unit area from 2.37 wt% and 4.16 molecules/nm for undoped HKUST-1 to 2.47 wt% and 4.33 molecules/nm, respectively. Defect creation via the replacement of the BTC linker with the IP linker slightly in HKUST-1 skeleton did not affect H uptake. Both Li-doping and defect creation significantly enhanced H uptake to 3.03 wt%, which was caused by the coordination of Li ions with free carboxylic groups of the created defects via IP replacement.
我们采用喷雾合成法制备了掺锂的HKUST-1（CuBTC；BTC = 1,3,5-苯三甲酸），并通过用间苯二甲酸（IP）部分取代均苯三甲酸（HBTC）来制造缺陷，以提高氢吸附容量。通过喷雾合成将LiNO掺入HKUST-1中，随后进行热处理以分解NO来实现锂掺杂，这使得在77 K和1 bar下，每单位质量和单位面积的氢吸收量分别从不掺杂的HKUST-1的2.37 wt%和4.16分子/纳米提高到2.47 wt%和4.33分子/纳米。在HKUST-1骨架中用IP连接体略微取代BTC连接体来制造缺陷并不影响氢吸收。锂掺杂和制造缺陷都显著提高了氢吸收量至3.03 wt%，这是由于锂离子通过IP取代与所制造缺陷的游离羧基配位所致。
