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Title: Tuning the Kinetic Water Stability and Adsorption Interactions of Mg-MOF-74 by Partial Substitution with Co or Ni

Journal Article · · Industrial and Engineering Chemistry Research

Varying amounts of Co and Ni were substituted into the metal–organic framework Mg-MOF-74 via a one-pot solvothermal reaction, and the effects of these substitutions on CO2 adsorption and kinetic water stability properties were examined. Based on elemental analyses, Co and Ni are more favorably incorporated into the MOF-74 framework from solution than Mg. In addition, reaction temperature more strongly impacts the final metal composition in these mixed-metal (MM) MOF-74 structures than does the reaction solvent composition. Single-component CO2 adsorption isotherms were measured for the MM-MOF-74 systems at 5, 25, and 45 °C, and isosteric heats of adsorption were calculated. These results suggest that CO2 adsorption properties can be adjusted by partial metal substitution. Water adsorption isotherms were also measured for the MM-MOF-74 samples, with powder X-ray diffraction patterns and Brunauer–Emmett–Teller surface areas measured both before and after water exposure. Results show that Mg-MOF-74 can gain partial kinetic water stability by the incorporation of Ni2+ or Co2+ metal ions that are less vulnerable to hydrolysis than Mg2+. Finally, of particular note, Mg–Ni-MM-MOF-74 shows a significant increase in water stability when incorporating as little as 16 mol % Ni into the Mg-MOF-74 structure.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012577
OSTI ID:
1370923
Journal Information:
Industrial and Engineering Chemistry Research, Vol. 54, Issue 49; Related Information: UNCAGE-ME partners with Georgia Institute of Technology (lead); Lehigh University; Oak Ridge National Laboratory; University of Alabama; University of Florida; University of Wisconsin; Washington University in St. Louis; ISSN 0888-5885
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 120 works
Citation information provided by
Web of Science

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Regulating the Coordination Environment of MOF‐Templated Single‐Atom Nickel Electrocatalysts for Boosting CO 2 Reduction journal January 2020
Mixed‐Metal MOFs: Unique Opportunities in Metal–Organic Framework (MOF) Functionality and Design journal October 2019
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The First C−Cl Activation in Ullmann C−O Coupling by MOFs journal September 2018
A Tunable Bimetallic MOF-74 for Adsorption Chiller Applications: A Tunable Bimetallic MOF-74 for Adsorption Chiller Applications journal February 2018
Solvent-Free Encapsulation at High Pressure with Carboxylate-Based MOFs: Solvent-Free Encapsulation at High Pressure with Carboxylate-Based MOFs journal November 2018
A Heterometallic MOF based on Monofunctional Linker by “One-pot” Solvothermal Method for Highly Selective Gas Adsorption: A Heterometallic MOF based on Monofunctional Linker by “One-pot” Solvothermal Method for Highly Selective Gas Adsorption journal April 2020
Stability of coordination polymers in water: state of the art and towards a methodology for nonporous materials journal December 2018
Influence of As-Formed Metal-Oxide in Non-Activated Water-Unstable Organometallic Framework Pores as Hydrolysis Delay Agent: Interplay Between Experiments and DFT Modeling journal September 2018
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Understanding and controlling water stability of MOF-74 journal January 2016
From rational design of a new bimetallic MOF family with tunable linkers to OER catalysts journal January 2019
Exploring the limits of adsorption-based CO 2 capture using MOFs with PVSA – from molecular design to process economics journal January 2020
Mg-MOF-74/MgF2 Composite Coating for Improving the Properties of Magnesium Alloy Implants: Hydrophilicity and Corrosion Resistance journal March 2018
Understanding and Controlling Water Stability of MOF-74 text January 2016