Electrochemical Hydrogen Storage in Amine‐Activated Polydopamine

Abstract

Electrochemical hydrogen storage combines the evolution, oxidation, and storage of hydrides from aqueous electrolytes and ionic liquids, but presently requires palladium or rare‐earth metals to achieve significant power capacities. Here hydrogen electrosorption in amine‐activated polydopamine is shown. The organic heterogeneous amine‐hydride yields a gravimetric hydrogen density of 0.44%, corresponding to a 80% hydride‐per‐monomer content, and offers similar reaction kinetics as for palladium and related systems. An initial stability test of 100 electrosorption cycles that demonstrates resilience in acidic media with a tendency for increased capacity over time is included. In situ vibronic amine‐hydride fingerprints corroborate the reversibility and stability of the conversion process and highlight the merits of amine‐activated polydopamines as a heterogeneous organic hydrogen storage system.

Electrochemical Hydrogen Storage Materials: State-of-the-Art and Future Perspectives

“…The maximum discharge capacity of the HSAs/PANI electrode increased from 302.6 mAh g –1 to 330.8 mAh g –1 compared to the bare HSAs electrode, and the capacity retention rate increased from 13.5% to 30.9%. Coskun et al synthesized amine-activated polydopamine (aaPDA) by oxidative chemical vapor deposition (oCVD). It was determined that aaPDA shows significant potential as a heterogeneous organic hydrogen storage system.…”

“…Salehabadi et al 267 reported a hydrogen storage system of rectangular nanocuboids beta copper phthalocyanine (β-CuPc). It was found that the discharge capacity of β-CuPc was approximately 1850 mAh g −1 , and the charge−discharge 269 synthesized amine-activated polydopamine (aaPDA) by oxidative chemical vapor deposition (oCVD). It was determined that aaPDA shows significant potential as a heterogeneous organic hydrogen storage system.…”

Advances in applying C–H functionalization and naturally sourced building blocks in organic semiconductor synthesis

“…159,160 Moreover, there are reports showing the potential of melanin to be used in batteries. [161][162][163] The applications of melanin as an OSM was also carefully reviewed by Shankar et al 142 Compared to indigo, developments of organic electronics using melanin are still in its early stages. There are two major barriers remaining.…”

Controllable Synthesis of Polyphenol Spheres via Amine-Catalyzed Polymerization-Induced Self-Assembly

“…Polyphenols are widely present in plant issues and exhibit a myriad of inherent functional physichemical and biological properties. Polyphenols materials offer new candidates for functional material applications 13 including catalysis, 14 energy storage, 15 imaging, 16−18 water treatment, 19 and even nanomedicine. 20−26 Rich in active functional groups, polyphenols show great potential in the fabrication of functional colloidal particles.…”

“…Polyphenols are widely present in plant issues and exhibit a myriad of inherent functional physichemical and biological properties. Polyphenols materials offer new candidates for functional material applications including catalysis, energy storage, imaging, − water treatment, and even nanomedicine. − Rich in active functional groups, polyphenols show great potential in the fabrication of functional colloidal particles. For example, the monodisperse polydopamine spheres with surface functional groups (−OH, −NH 2 ) fabricated by Lee et al could be used as an active template for easily preparing a variety of nanostructures .…”