Stability of a Zirconium‐Based Metal–Organic Framework, MOF‐808, in Common Aqueous Electrolytes and Buffer Solutions

Zirconium‐based metal–organic frameworks (Zr‐MOFs) are highly attractive for various electrochemical applications owing to their exceptional stability in water, and MOF‐808, a Zr‐MOF with relatively large pores (around 1.8 nm) and six‐connected hexa‐zirconium nodes that are capable of further post‐synthetic modifications, is especially appealing. Herein, the chemical stability of MOF‐808 in nine commonly used unbuffered aqueous electrolytes and nine buffer solutions under 0.1 M was investigated. Crystallinity, morphology, and porosity of MOF‐808 samples after the exposure to these solutions were examined, and various characterizing techniques were employed to probe the adsorption of ionic species in MOF‐808 after these treatments. Findings here guide the rational selection of aqueous electrolytes and aqueous buffer solutions for the use of MOF‐808 and similar Zr‐MOFs, not only in various electrochemical processes, but also in other applications requiring buffer solutions.