Highly efficient electrocatalytic hydrogen evolution from neutral aqueous solution by a water-soluble anionic cobalt(ii) porphyrin. Issue 81 (1st September 2015)

• Record Type: Journal Article
• Authors: Beyene, Belete B.; Mane, Sandeep B.; Hung, Chen-Hsiung
• Is Part Of: Chemical communications. Volume 51:Issue 81(2015)
• Page Start: 15067
• Page End: 15070
• Publication Date: 2015-09-01
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c5cc05582b
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : CoTPPS is an efficient electrocatalyst for H2 generation from neutral phosphate buffer solution. It features quantitative Faradaic efficiency with a TOF of ∼1.83 s −1 and a TON of 1.9 × 10 4 mol of H2 per mole of catalyst at an applied potential of −1.29 V ( vs. SHE). Abstract : We report the use of a water-soluble anionic cobalt(ii ) tetrakis( p -sulfonatophenyl)porphyrin (CoTPPS) as a stable, active, and efficient catalyst for electrocatalytic H2 generation from neutral H2 O without any organic additives. The molecule features nearly quantitative Faradaic efficiency with a turnover frequency of ∼1.83 s −1 measured over 1 h and a turnover number of 1.9 × 10 4 moles of H2 per mole of catalyst with no loss of activity over 73 h at an applied potential of −1.29 V ( vs. SHE) in neutral phosphate buffer solution.