Synthesis of Polynorbornadiene within the Pores of Activated Carbons: Effects on EDLC and Hydrogen Adsorption Performances
Synthesis of Polynorbornadiene within the Pores of Activated Carbons: Effects on EDLC and Hydrogen Adsorption Performances
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DOI：
10.1021/acs.langmuir.2c01844
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发表时间：
2022-09-21
期刊：
影响因子：
3.9
通讯作者：
Ohzawa, Yoshimi
中科院分区：
文献类型：
--
作者：
Itoi, Hiroyuki;Suzuki, Ryutaro;Ohzawa, Yoshimi
降冰片二烯（NBD）吸附在活性炭（AC）上，吸附后的NBD在活性炭的孔内发生聚合。研究了杂化聚降冰片二烯（PNBD）对双电层电容器及氢吸附性能的影响。对AC/PNBD杂化体进行了扫描电镜和透射电镜观察，证实PNBD杂化体存在于AC的孔隙中，而AC颗粒表面几乎没有PNBD。对AC-4杂化体的氮吸附/解吸测定表明，无论PNBD的含量如何，PNBD在微孔内的杂交优先于中孔内。此外，随着PNBD用量的增加，微孔和中孔体积均以恒定速率减小。这些结果表明，PNBD在两种活性炭中不是以层的形式杂化，而是以团簇的形式杂化，并且团簇分布在整个活性炭孔中，这一结果得到了电化学测量结果和杂化体的氢吸附行为的支持。
Norbornadiene (NBD) is adsorbed on activated carbon (AC), and the adsorbed NBD is polymerized within the pores of AC. Two kinds of ACs-AC-2 with only micropores of & SIM;2 nm and AC-4 with not only micropores but also mesopores below 4 nm-are examined to study the effects of the hybridized polynorbornadiene (PNBD) on the electric double-layer capacitor and hydrogen adsorption performance. Various measurements are performed to determine the form of the hybridized PNBD inside the pores of AC. Scanning and transmittance electron microscopy observations of the AC/PNBD hybrids confirm that PNBD is hybridized inside the pores of AC, and there is little PNBD on the surface of AC particles. The nitrogen adsorption/desorption measurement for the hybrids of AC-4 reveals that PNBD is not hybridized preferentially inside micropores rather than mesopores irrespective of the amount of PNBD. In addition, both micropore and mesopore volumes decrease at a constant rate with increasing amounts of PNBD. These results suggest that PNBD is hybridized not as a layer but as an agglomerate for both ACs, and the agglomerate delocalizes over the whole AC pores, which is supported by the results of electrochemical measurements and hydrogen adsorption behavior of the hybrids.