Improving the synthetic H₂production catalyst design strategy with the neurotransmitter dopamine

Abstract

Strategic incorporation of neurotransmitter dopamine around a cobaloxime core revealed excellent electrocatalytic (rate 8400 s-1) and photocatalytic H2 production in neutral aqueous conditions. The influence of synthetic outer coordination sphere...

Post-synthetic modulation of UiO-66-NH2 with a cobaloxime catalyst for efficient hydrogen production

“…14 Such inclusion of the OCS feature has been replicated by native proteins, engineered peptides, amino acids, neurotransmitters, and even drug molecules, where the identical cobaloxime core was deployed as a screening template. [15][16][17][18][19][20] However, a cobaloxime outlined by a MOF-based OCS has been rarely explored for both photo-and electrocatalytic HER activity. 10 Herein, a synthetically modified version of UiO-66-NH 2 was appended to an axial pyridine via a methylene (-CH 2 -) spacer and subsequently linked to a cobaloxime motif (Fig.…”

Crafting Fast and Efficient H2Evolution Electrocatalysts with Tactical Inclusion of Nucleobases

“…The porphyrin- and cobaloxime-based complexes [Co­(dimethylglyoxime) 2 ] represent other major genres of synthetic H 2 evolution reaction (HER) catalysts with impressive intrinsic oxygen tolerance. Dey’s and our group explored the outer sphere effects on porphyrin and cobaloxime templates in detail, although any biomolecule beyond amino acid derivatives has rarely been tested for remote regulation of synthetic HER catalysts. − …”

Peripheral nucleic bases boost H2production by synthetic molecular catalysts in acidic water

“…3A and Table 1 and Table S4, S5, ESI†). 16–18,26,29 On the other hand, C2 and C3 produced H 2 at a rate of ∼16 000 s −1 and 27 000 s −1 , respectively (Fig. 3A and Table 1).…”

“…Later, the OCS pool has been expanded beyond amino acids, as the rational inclusion of neurotransmitter, vitamins, and even drug derivatives has positively influenced the electrocatalytic and photocatalytic HER by cobaloxime core. 17–20…”

“…Later, the OCS pool has been expanded beyond amino acids, as the rational inclusion of neurotransmitter, vitamins, and even drug derivatives has positively influenced the electrocatalytic and photocatalytic HER by cobaloxime core. [17][18][19][20] Despite their improved HER activity, these cobaloxime derivatives are functional largely at near-neutral pH as their activity is significantly reduced in acidic conditions (pH o 5) due to the inherent instability of the hydrogen-bonded oxime network, the primary coordination sphere around the cobalt core. Hence, there is a requirement to introduce peripheral protic groups that can come alive for rapid proton transport via protonation at pH o 5.0, and continue to relay protons to the cobalt core from bulk even with a disrupted oxime network.…”