A super-efficient cobalt catalyst for electrochemical hydrogen production from neutral water with 80 mV overpotentialElectronic supplementary information (ESI) available: Experimental procedures, additional CVs, UV-vis spectra, SEM images, EDX, EPR and XPS spectra. See DOI: 10.1039/c3ee42194e

Self-assembled molecular iron and cobalt catalysts (MP 4 N 2 , M = Fe, Co) bearing a multihydroxy-functionalized tetraphosphine ligand electrocatalyze H 2 generation from neutral water on a mercury electrode at −1.03 and −0.50 V vs. NHE, respectively. Complex CoP 4 N 2 displays extremely low overpot...

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Main Authors: Chen, Lin, Wang, Mei, Han, Kai, Zhang, Peili, Gloaguen, Frederic, Sun, Licheng
Format: Article
Language:English
Online Access:Get full text
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Summary:Self-assembled molecular iron and cobalt catalysts (MP 4 N 2 , M = Fe, Co) bearing a multihydroxy-functionalized tetraphosphine ligand electrocatalyze H 2 generation from neutral water on a mercury electrode at −1.03 and −0.50 V vs. NHE, respectively. Complex CoP 4 N 2 displays extremely low overpotential ( E onset = 80 mV) while maintaining high activity and good stability. Bulk electrolysis of CoP 4 N 2 in a neutral phosphate buffer solution at −1.0 V vs. NHE produced 9.24 × 10 4 mol H 2 per mol cat. over 20 h, with a Faradaic efficiency close to 100% and without apparent deactivation. A cobalt complex electrocatalyzes hydrogen production from neutral water at low overpotentials while maintaining high activity and good stability.
ISSN:1754-5692
1754-5706
DOI:10.1039/c3ee42194e