The need for a net zero carbon emission future is imperative forenvironmental sustainability hence, intensive carbon fuels would need tobe replaced with less carbon emitting energy sources such as natural gastill clea...The need for a net zero carbon emission future is imperative forenvironmental sustainability hence, intensive carbon fuels would need tobe replaced with less carbon emitting energy sources such as natural gastill clean energy source such as hydrogen becomes commercialized. Asa result, this mini review discusses the use of metal organic framework(MOF) for adsorption of methane and hydrogen in specially designed tanksfor improved performance so as to increase their applicability. Herein,adsorption (delivery) capacity of selected high performing MOFs formethane and hydrogen storage were highlighted in reference to the targetsset by United States Department of Energy’s Advanced Research ProjectsAgency-Energy (ARPA-E) and Fuel Cells Technology Office. In thisregard, specific design and chemistry of MOFs for improved methane andhydrogen adsorption were highlighted accordingly. In addition, an overviewof computational and molecular studies of hypothetical MOFs was done- the various approaches used and their proficiency for construction ofspecific of crystalline structures and topologies were herewith discussed.展开更多
Hydrogen is expected to play an important role in future transportation as a promising alternative clean energy source to carbon-based fuels. One of the key challenges to commercialize hydrogen energy is to develop ap...Hydrogen is expected to play an important role in future transportation as a promising alternative clean energy source to carbon-based fuels. One of the key challenges to commercialize hydrogen energy is to develop appropriate onboard hydrogen storage systems, capable of charging and discharging large quantities of hydrogen with fast enough kinetics to meet commercial requirements. Metal organic framework （MOF） is a new type of inorganic and organic hybrid nanoporous particulate materials. Its diverse networks can enhance hydrogen storage through tuning the structure and property of MOFs. The MOF materials so far developed adsorb hydrogen through weak dispersion interactions, which allow significant quantity of hydrogen to be stored at cryogenic temperatures with fast kinetics. Novel MOFs are being developed to strengthen the interactions between hydrogen and MOFs in order to store hydrogen under ambient conditions. This review surveys the development of such candidate materials, their performance and future research needs.展开更多
Hydrogen is a generally abundant, safe, clean and environmentally apt alternative fuel, which replenishes the void generated by depleting fossil fuel reserves. The adoption of hydrogen as an energy source has been res...Hydrogen is a generally abundant, safe, clean and environmentally apt alternative fuel, which replenishes the void generated by depleting fossil fuel reserves. The adoption of hydrogen as an energy source has been restricted to low levels due to the complications associated with its viable storage and usage. Existing technologies, such as storage of hydrogen in compressed and liquefied forms are not adequate to meet the broad on-board applications. The gravimetric energy density(120 MJ/kg) of hydrogen is three times higher than that of gasoline products, so solid-state hydrogen storage is advantageous.Metal-organic frameworks(MOFs), multi-walled carbon nanotubes(MWCNTs) and graphene are solid adsorbents majorly employed for efficient H_2 storage. The prominent features of MOFs such as permanent porosity, structural rigidity, and surface area are attractive and ideal for hydrogen storage. In addition,nanostructured carbon materials(MWCNTs and graphene) and their composites have demonstrated significant hydrogen storage capacities. Some important parameters for the success of the hydrogen economy include high storage density, adsorption/desorption temperature and cycling time. Cryo-hydrogen storage was achieved in MOFs and their composites with carbon structures, but storage at ambient temperature and acceptable pressures is a major hurdle. This review discusses various strategies and mechanisms in the design of adsorbents explored to improve H_2 storage capacities and afford opportunities to develop new sustainable hydrogen technologies to meet energy targets.展开更多
Hydrogen adsorption isotherms were measured at ambient temperature to pressures exceeding 300 bar for three benchmark adsorbents: two metal-organic frameworks, Cu3(btc)2 (btc = 1,3,5-benzenetricarboxylate) and Zn4O(bt...Hydrogen adsorption isotherms were measured at ambient temperature to pressures exceeding 300 bar for three benchmark adsorbents: two metal-organic frameworks, Cu3(btc)2 (btc = 1,3,5-benzenetricarboxylate) and Zn4O(btb)2 (btb = 1,3,5-benzenetribenzoate), and the activated carbon MSC-30. The Dubinin-Astakhov model was applied to calculated absolute adsorption isotherms as a function of the fugacity to determine the adsorption enthalpy at ambient temperature. Comparisons of the calculated enthalpies and the surface excess concentration (excess adsorption per square meter of surface) show that Zn4O(btb)2 has an adsorption enthalpy comparable to MSC-30, but that the spacing between adsorbed molecules is much larger.展开更多
This review summarizes the recent literature on the synthesis, characterization, and adsorption properties of meal-organic framework MOF-177. MOF-177 is a porous crystalline material that consists of Zn40 tetrahedrons...This review summarizes the recent literature on the synthesis, characterization, and adsorption properties of meal-organic framework MOF-177. MOF-177 is a porous crystalline material that consists of Zn40 tetrahedrons connected with benzene tribenzoate （BTB） ligands, It is an ideal adsorbent with an ex- ceptionally high specific surface area （BET〉4500 m^2/g）, a uniform micropore size dJstrJbutJon with a median pore diameter of 12.7 A, a large pore volume （2.65 cm^3/g）, and very promising adsorption properties for hy- drogen storage and other gas separation and purification applications. A hydrogen adsorption amount of 19.6 wt.% on MOF-177 at 77 K and 100 bar was observed, and a CO2 uptake of 35 mmol/g on MOF-177 was measured at 45 bar and an ambient temperature. Other hydrogen properties （kinetics and heat of ad- sorption） along with adsorption of other gases including CO2, CO, CH4, and N2Oon MOF-177 were also be discussed. It was observed in experiments that MOF-177 adsorbent tends to degrade or decompose when it is exposed to moisture. Thermogravimetric analysis showed that the structure of MOF-177 remains intact at temperatures below 330℃ under a flow of oxygen, but decomposes to zinc oxide at 420℃.展开更多
Hydrogen storage material has been much developed recently because of its potential for proton exchange membrane （PEM） fuel cell applications. A successful solid-state reversible storage material should meet the req...Hydrogen storage material has been much developed recently because of its potential for proton exchange membrane （PEM） fuel cell applications. A successful solid-state reversible storage material should meet the requirements of high storage capacity, suitable thermodynamic properties, and fast adsorption and desorption kinetics. Complex hydrides, including boron hydride and alanate, ammonia borane, metal organic frameworks （MOFs）, covalent organic frameworks （COFs） and zeolitic imidazolate frameworks （ZIFs）, are remarkable hydrogen storage materials because of their advantages of high energy density and safety. This feature article focuses mainly on the thermodynamics and kinetics of these hydrogen storage materials in the past few years.展开更多
文摘The need for a net zero carbon emission future is imperative forenvironmental sustainability hence, intensive carbon fuels would need tobe replaced with less carbon emitting energy sources such as natural gastill clean energy source such as hydrogen becomes commercialized. Asa result, this mini review discusses the use of metal organic framework(MOF) for adsorption of methane and hydrogen in specially designed tanksfor improved performance so as to increase their applicability. Herein,adsorption (delivery) capacity of selected high performing MOFs formethane and hydrogen storage were highlighted in reference to the targetsset by United States Department of Energy’s Advanced Research ProjectsAgency-Energy (ARPA-E) and Fuel Cells Technology Office. In thisregard, specific design and chemistry of MOFs for improved methane andhydrogen adsorption were highlighted accordingly. In addition, an overviewof computational and molecular studies of hypothetical MOFs was done- the various approaches used and their proficiency for construction ofspecific of crystalline structures and topologies were herewith discussed.
文摘Hydrogen is expected to play an important role in future transportation as a promising alternative clean energy source to carbon-based fuels. One of the key challenges to commercialize hydrogen energy is to develop appropriate onboard hydrogen storage systems, capable of charging and discharging large quantities of hydrogen with fast enough kinetics to meet commercial requirements. Metal organic framework （MOF） is a new type of inorganic and organic hybrid nanoporous particulate materials. Its diverse networks can enhance hydrogen storage through tuning the structure and property of MOFs. The MOF materials so far developed adsorb hydrogen through weak dispersion interactions, which allow significant quantity of hydrogen to be stored at cryogenic temperatures with fast kinetics. Novel MOFs are being developed to strengthen the interactions between hydrogen and MOFs in order to store hydrogen under ambient conditions. This review surveys the development of such candidate materials, their performance and future research needs.
基金the National Research Foundation of South Africa and the University of KwaZulu-Natal,South Africa for financial assistance and research facilities
文摘Hydrogen is a generally abundant, safe, clean and environmentally apt alternative fuel, which replenishes the void generated by depleting fossil fuel reserves. The adoption of hydrogen as an energy source has been restricted to low levels due to the complications associated with its viable storage and usage. Existing technologies, such as storage of hydrogen in compressed and liquefied forms are not adequate to meet the broad on-board applications. The gravimetric energy density(120 MJ/kg) of hydrogen is three times higher than that of gasoline products, so solid-state hydrogen storage is advantageous.Metal-organic frameworks(MOFs), multi-walled carbon nanotubes(MWCNTs) and graphene are solid adsorbents majorly employed for efficient H_2 storage. The prominent features of MOFs such as permanent porosity, structural rigidity, and surface area are attractive and ideal for hydrogen storage. In addition,nanostructured carbon materials(MWCNTs and graphene) and their composites have demonstrated significant hydrogen storage capacities. Some important parameters for the success of the hydrogen economy include high storage density, adsorption/desorption temperature and cycling time. Cryo-hydrogen storage was achieved in MOFs and their composites with carbon structures, but storage at ambient temperature and acceptable pressures is a major hurdle. This review discusses various strategies and mechanisms in the design of adsorbents explored to improve H_2 storage capacities and afford opportunities to develop new sustainable hydrogen technologies to meet energy targets.
文摘Hydrogen adsorption isotherms were measured at ambient temperature to pressures exceeding 300 bar for three benchmark adsorbents: two metal-organic frameworks, Cu3(btc)2 (btc = 1,3,5-benzenetricarboxylate) and Zn4O(btb)2 (btb = 1,3,5-benzenetribenzoate), and the activated carbon MSC-30. The Dubinin-Astakhov model was applied to calculated absolute adsorption isotherms as a function of the fugacity to determine the adsorption enthalpy at ambient temperature. Comparisons of the calculated enthalpies and the surface excess concentration (excess adsorption per square meter of surface) show that Zn4O(btb)2 has an adsorption enthalpy comparable to MSC-30, but that the spacing between adsorbed molecules is much larger.
基金国家自然科学基金资助项目(22072172)国家杰出青年科学基金资助项目(21825204)+2 种基金中国科学院青年创新促进会资助项目(Y2021056)榆林学院与大连清洁能源国家实验室合作基金资助项目(YLU-DNL Fund 2022007)山西省科技创新团队专项资金资助项目(202304051001007)。
文摘This review summarizes the recent literature on the synthesis, characterization, and adsorption properties of meal-organic framework MOF-177. MOF-177 is a porous crystalline material that consists of Zn40 tetrahedrons connected with benzene tribenzoate （BTB） ligands, It is an ideal adsorbent with an ex- ceptionally high specific surface area （BET〉4500 m^2/g）, a uniform micropore size dJstrJbutJon with a median pore diameter of 12.7 A, a large pore volume （2.65 cm^3/g）, and very promising adsorption properties for hy- drogen storage and other gas separation and purification applications. A hydrogen adsorption amount of 19.6 wt.% on MOF-177 at 77 K and 100 bar was observed, and a CO2 uptake of 35 mmol/g on MOF-177 was measured at 45 bar and an ambient temperature. Other hydrogen properties （kinetics and heat of ad- sorption） along with adsorption of other gases including CO2, CO, CH4, and N2Oon MOF-177 were also be discussed. It was observed in experiments that MOF-177 adsorbent tends to degrade or decompose when it is exposed to moisture. Thermogravimetric analysis showed that the structure of MOF-177 remains intact at temperatures below 330℃ under a flow of oxygen, but decomposes to zinc oxide at 420℃.
基金Acknowledgements The authors gratefully acknowledged the financial support for this work from the National Basic Research Program of China （973 Program） （Grant No. 2010CB631303）, the National Natural Science Foundation of China （Grant Nos. 20833009, 20873148, 20903095, 50901070, 51071146, 51071081, and U0734005）, IUPAC （Project No. 2008-006-3-100）, Dalian Science and Technology Foundation （Grant No. 2009AllGX052）, Liaoning BaiQianWan Talents Program （Project No. 2010921050）, and the State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology （Grant No. KFJJ10-1Z）.
文摘Hydrogen storage material has been much developed recently because of its potential for proton exchange membrane （PEM） fuel cell applications. A successful solid-state reversible storage material should meet the requirements of high storage capacity, suitable thermodynamic properties, and fast adsorption and desorption kinetics. Complex hydrides, including boron hydride and alanate, ammonia borane, metal organic frameworks （MOFs）, covalent organic frameworks （COFs） and zeolitic imidazolate frameworks （ZIFs）, are remarkable hydrogen storage materials because of their advantages of high energy density and safety. This feature article focuses mainly on the thermodynamics and kinetics of these hydrogen storage materials in the past few years.
基金Acknowledgements This work was financially supported by the National Natural Science Foundation of China （Nos. 21201134 and 21571145）, the Natural Science Foundation of Jiangsu Province （No. BK20130370）, the Natural Science Foundation of Hubei Province （No. 2013CFB288）, the Creative Research Groups of Hubei Province （No. 2014CFA007）, and Large-scale Instrument and Equipment Sharing Foundation of Wuhan University.
