Electrocatalytic Water Oxidation by a Copper(II) Complex of an Oxidation-Resistant Ligand

Katherine J. Fisher; Kelly L. Materna; Brandon Q. Mercado; Robert H. Crabtree; Gary W Brudvig

doi:10.1021/acscatal.7b00494

Electrocatalytic Water Oxidation by a Copper(II) Complex of an Oxidation-Resistant Ligand

Katherine J. Fisher, Kelly L. Materna, Brandon Q. Mercado, Robert H. Crabtree, Gary W Brudvig

Yale University

Research output: Contribution to journal › Article

57 Citations (Scopus)

Abstract

The copper(II) complex Cu(pyalk)₂ (pyalk = 2-pyridyl-2-propanoate) is a robust homogeneous water-oxidation electrocatalyst under basic conditions (pH > 10.4). Water oxidation occurs at a relatively low overpotential for copper of 520-580 mV with a turnover frequency of ∼0.7 s^-1. Controlled potential electrolysis experiments over 12 h at 1.1 V vs NHE resulted in the formation of >30 catalytic turnovers of O₂ with only ∼20% catalyst degradation. The robustness of the catalyst under fairly harsh conditions and the low overpotential further highlight the oxidation resistance and strong donor character of pyalk.

Original language	English
Pages (from-to)	3384-3387
Number of pages	4
Journal	ACS Catalysis
Volume	7
Issue number	5
DOIs	https://doi.org/10.1021/acscatal.7b00494
Publication status	Published - May 5 2017

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Keywords

copper electrocatalysis
homogeneous electrocatalysis
OER
oxygen-evolution reaction
water-oxidation catalysis

ASJC Scopus subject areas

Catalysis

Cite this

Fisher, K. J., Materna, K. L., Mercado, B. Q., Crabtree, R. H., & Brudvig, G. W. (2017). Electrocatalytic Water Oxidation by a Copper(II) Complex of an Oxidation-Resistant Ligand. ACS Catalysis, 7(5), 3384-3387. https://doi.org/10.1021/acscatal.7b00494

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abstract = "The copper(II) complex Cu(pyalk)2 (pyalk = 2-pyridyl-2-propanoate) is a robust homogeneous water-oxidation electrocatalyst under basic conditions (pH > 10.4). Water oxidation occurs at a relatively low overpotential for copper of 520-580 mV with a turnover frequency of ∼0.7 s-1. Controlled potential electrolysis experiments over 12 h at 1.1 V vs NHE resulted in the formation of >30 catalytic turnovers of O2 with only ∼20% catalyst degradation. The robustness of the catalyst under fairly harsh conditions and the low overpotential further highlight the oxidation resistance and strong donor character of pyalk.",

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AU - Brudvig, Gary W

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10.1021/acscatal.7b00494