A Molecular Cobalt Hydrogen Evolution Catalyst Showing High Activity and Outstanding Tolerance to CO and O₂

Jia-Wei Wang, Kosei Yamauchi, Hai-Hua Huang, Jia-Kai Sun, Zhi-Mei Luo, Di-Chang Zhong, Tong-Bu Lu, Ken Sakai

Research output: Contribution to journalArticle

Abstract

There is a demand to develop molecular catalysts promoting hydrogen evolution reaction (HER) with a high catalytic rate together with high tolerance to various inhibitors, such as CO and O2. Here we report a cobalt catalyst possessing a penta‐dentate macrocyclic ligand (1‐Co), which exhibits a fast catalytic rate (TOF = 2210 s‐1) in aqueous pH 7.0 phosphate buffer solution, where proton transfer from dihydrogen phosphate anion (H2PO4‐) plays a key role in catalytic enhancement. It turns out an outstanding electrocatalyst exhibiting high tolerance to inhibitors, displaying over 90% retention in its activity under either CO or air atmosphere. Its high tolerance to CO is concluded to arise from the kinetically labile character of undesirable CO‐bound species due to the geometrical frustration posed by the ligand, prohibiting an ideal trigonal bipyramid to be established.
Original languageEnglish
JournalAngewandte Chemie - International Edition
Publication statusPublished - Jun 4 2019

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Carbon Monoxide
Cobalt
Hydrogen
Catalysts
Phosphates
Ligands
Proton transfer
Electrocatalysts
Anions
Buffers
Negative ions
Air

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A Molecular Cobalt Hydrogen Evolution Catalyst Showing High Activity and Outstanding Tolerance to CO and O₂. / Wang, Jia-Wei ; Yamauchi, Kosei; Huang, Hai-Hua; Sun, Jia-Kai; Luo, Zhi-Mei; Zhong, Di-Chang ; Lu, Tong-Bu; Sakai, Ken.

In: Angewandte Chemie - International Edition, 04.06.2019.

Research output: Contribution to journalArticle

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