Wenzhuo Li , Chenchen Wang , Mengyi Wang , Lei Cheng , Lixian Sun , Puxuan Yan
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引用次数: 0
摘要
整体催化剂对于通过 NaBH4 水解制氢的进一步工业应用非常重要。目前,气凝胶基整体催化剂的结构稳定性和催化性能仍有待进一步提高。本文通过ZIF-67在GO表面的原位生长和转化合成了无定形的Ru-Co(OH)x@GO颗粒,其催化NaBH4水解产氢速率和活化能分别达到11062 mL min-1 g-1和36.2 kJ mol-1。同时,通过溶液共混和冷冻干燥制备了 Ru-Co(OH)x@GO、壳聚糖和羰基化纤维素纳米纤维的复合气凝胶,在相同的 Ru-Co(OH)x@GO 用量下,制氢率为 7680 mL min-1 g-1(保留率为 69.4%)。此外,气凝胶在高速催化制氢后仍能保持结构的完整性,便于回收和再利用,这得益于羰基化纤维素纳米纤维和壳聚糖大分子与骨架的共结构偶联。这项工作为整体催化剂的开发提供了一种便捷、可控的策略。
Robust aerogel of two-dimensional composite microparticle of amorphous ruthenium-cobalt hydroxide and GO for hydrogen generation via NaBH4 hydrolysis
Monolithic catalyst is very important for the further industrial application of hydrogen production via NaBH4 hydrolysis. Nowadays, the structural stability and catalytic performance of aerogel based monolithic catalysts still need to be further improved. Herein, the amorphous Ru–Co(OH)x@GO particles are synthesized by in-situ growth and transformation of ZIF-67 on the surface of GO, the hydrogen generation rate and activation energy via catalytic NaBH4 hydrolysis can reach 11,062 mL min−1 g−1 and 36.2 kJ mol−1, respectively. Meanwhile, the composite aerogel of Ru–Co(OH)x@GO, chitosan and carbonylated cellulose nanofiber is prepared by solution blending and freeze drying, and the hydrogen generation rate has 7680 mL min−1 g−1 (retained 69.4%) under the same amount of Ru–Co(OH)x@GO. Furthermore, after high speed catalytic hydrogen generation, the aerogel can still maintain its structural integrity, thus facilitating recovery and reuse, which is attributed to the co-structural coupling of carbonylated cellulose nanofiber and chitosan macromolecule to the skeleton. This work provides a convenient and controllable strategy for the development of monolithic catalysts.
期刊介绍:
The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc.
The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.