MOF-Derived Hierarchically Porous Carbon with Exceptional Porosity and Hydrogen Storage Capacity

Abstract

Highly porous carbon has played an important role in tackling down the energy and environmental problems due to their attractive features such as high specific surface area (SSA), stability, and mass productivity. Especially, the desirable characteristics of the highly porous carbon such as lightweight, fast adsorption/desorption kinetics, and high SSA have attracted extensive attention in the "hydrogen storage" application which is a main bottleneck for the realization of on-board hydrogen fuel cell vehicles. We herein presented porous carbon with hierarchical pore structure derived from highly crystalline metal organic frameworks (denoted as MOF-derived carbon: MDC) without any carbon source and showed it as a promising hydrogen storage adsorbent. MDCs can be fabricated by a simple heat adjustment of MOFs without complicated process and environmental burden. The MDC displayed hierarchical pore structures with high ultramicroporosity, high SSA, and very high total pore volume. Due to its exceptional porosity, MDCs exhibited reversible H 2 storage capacities at certain conditions that were better than those of previously reported porous carbons and MOFs.

Catalytic Ammonia Decomposition over High-Performance Ru/Graphene Nanocomposites for Efficient COx-Free Hydrogen Production

“…In physical storage routes, hydrogen compressed under high pressure or stored in a liquid state can achieve attractive volumetric density, but these technologies suffer from extremely harsh processing conditions at a very high cost with severe safety concerns. On the other hand, although hydrogen can be stored in porous materials via adsorption under mild conditions [5][6][7][8][9], the relatively low hydrogen storage capacity of various sorbents seems to be an insurmountable obstacle for practical applications. A great deal of attention has been paid to the chemical storage of hydrogen, and various types of hydrogen storage systems have been intensively studied based on different hydrogen carriers such as metal and organic hydrides [10][11][12][13][14].…”

Comparison of MOF-5- and Cr-MOF-derived carbons for hydrogen storage application

“…MOFS can be integrated into other hydrogen storage applications such as high pressure tanks [6], generation of nanoporous carbons material via carbonization [7] and in electrospinning [8,9]. Nanoporous carbon materials themselves have also gained much attention as potential hydrogen storage media for the same reasons as MOFs [7,10,11].…”

“…Nanoporous carbon materials themselves have also gained much attention as potential hydrogen storage media for the same reasons as MOFs [7,10,11].…”

“…Porous carbonaceous materials can be synthesized in a variety of ways including direct carbonization of MOFs [7], pyrolysis followed by physical or chemical activation of organic precursors [12], carbonization of polymeric aerogels [11,13], chemical vapor deposition (CVD) [13], template synthetic procedures [14].…”

“…The carbonization of MOFs was first introduced using Zn-based MOFs (MOF-5) to derive porous carbonaceous materials [15]. This carbon synthesis method has been reported by several groups [7,16].…”