A nickel (II) PY5 complex as an electrocatalyst for water oxidation

Lei Wang; Lele Duan; Ram B. Ambre; Quentin Daniel; Hong Chen; Junliang Sun; Biswanath Das; Anders Thapper; Jens Uhlig; Peter Dinér; Licheng Sun

doi:10.1016/j.jcat.2015.12.003

A nickel (II) PY5 complex as an electrocatalyst for water oxidation

Lei Wang, Lele Duan, Ram B. Ambre, Quentin Daniel, Hong Chen, Junliang Sun, Biswanath Das, Anders Thapper, Jens Uhlig, Peter Dinér, Licheng Sun

Chemical Physics

Research output: Contribution to journal › Article › peer-review

Abstract

A Ni-PY5 [PY5 = 2,6-bis(1,1-bis(2-pyridyl)ethyl)pyridine)] complex has been found to act as an electrocatalyst for oxidizing water to dioxygen in aqueous phosphate buffer solutions. The rate of water oxidation catalyzed by the Ni-PY5 is remarkably enhanced by the proton acceptor base HPO42−, with rate constant of 1820 M−1 s−1. Controlled potential bulk electrolysis with Ni-PY5 at pH 10.8 under an applied potential of 1.5 V vs. normal hydrogen electrode (NHE) resulted in dioxygen formation with a high faradaic efficiency over 90%. A detailed mechanistic study identifies the water nucleophilic attack pathway for water oxidation catalysis.

Original language	English
Pages (from-to)	72-78
Number of pages	7
Journal	Journal of Catalysis
Volume	335
DOIs	https://doi.org/10.1016/j.jcat.2015.12.003
Publication status	Published - 2016 Mar 1

Subject classification (UKÄ)

Physical Chemistry (including Surface- and Colloid Chemistry)

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10.1016/j.jcat.2015.12.003

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title = "A nickel (II) PY5 complex as an electrocatalyst for water oxidation",

abstract = "A Ni-PY5 [PY5 = 2,6-bis(1,1-bis(2-pyridyl)ethyl)pyridine)] complex has been found to act as an electrocatalyst for oxidizing water to dioxygen in aqueous phosphate buffer solutions. The rate of water oxidation catalyzed by the Ni-PY5 is remarkably enhanced by the proton acceptor base HPO42−, with rate constant of 1820 M−1 s−1. Controlled potential bulk electrolysis with Ni-PY5 at pH 10.8 under an applied potential of 1.5 V vs. normal hydrogen electrode (NHE) resulted in dioxygen formation with a high faradaic efficiency over 90\%. A detailed mechanistic study identifies the water nucleophilic attack pathway for water oxidation catalysis.",

author = "Lei Wang and Lele Duan and Ambre, \{Ram B.\} and Quentin Daniel and Hong Chen and Junliang Sun and Biswanath Das and Anders Thapper and Jens Uhlig and Peter Din{\'e}r and Licheng Sun",

year = "2016",

month = mar,

day = "1",

doi = "10.1016/j.jcat.2015.12.003",

language = "English",

volume = "335",

pages = "72--78",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Elsevier",

}

TY - JOUR

T1 - A nickel (II) PY5 complex as an electrocatalyst for water oxidation

AU - Wang, Lei

AU - Duan, Lele

AU - Ambre, Ram B.

AU - Daniel, Quentin

AU - Chen, Hong

AU - Sun, Junliang

AU - Das, Biswanath

AU - Thapper, Anders

AU - Uhlig, Jens

AU - Dinér, Peter

AU - Sun, Licheng

PY - 2016/3/1

Y1 - 2016/3/1

N2 - A Ni-PY5 [PY5 = 2,6-bis(1,1-bis(2-pyridyl)ethyl)pyridine)] complex has been found to act as an electrocatalyst for oxidizing water to dioxygen in aqueous phosphate buffer solutions. The rate of water oxidation catalyzed by the Ni-PY5 is remarkably enhanced by the proton acceptor base HPO42−, with rate constant of 1820 M−1 s−1. Controlled potential bulk electrolysis with Ni-PY5 at pH 10.8 under an applied potential of 1.5 V vs. normal hydrogen electrode (NHE) resulted in dioxygen formation with a high faradaic efficiency over 90%. A detailed mechanistic study identifies the water nucleophilic attack pathway for water oxidation catalysis.

AB - A Ni-PY5 [PY5 = 2,6-bis(1,1-bis(2-pyridyl)ethyl)pyridine)] complex has been found to act as an electrocatalyst for oxidizing water to dioxygen in aqueous phosphate buffer solutions. The rate of water oxidation catalyzed by the Ni-PY5 is remarkably enhanced by the proton acceptor base HPO42−, with rate constant of 1820 M−1 s−1. Controlled potential bulk electrolysis with Ni-PY5 at pH 10.8 under an applied potential of 1.5 V vs. normal hydrogen electrode (NHE) resulted in dioxygen formation with a high faradaic efficiency over 90%. A detailed mechanistic study identifies the water nucleophilic attack pathway for water oxidation catalysis.

UR - https://www.scopus.com/pages/publications/84954413362

U2 - 10.1016/j.jcat.2015.12.003

DO - 10.1016/j.jcat.2015.12.003

M3 - Article

SN - 0021-9517

VL - 335

SP - 72

EP - 78

JO - Journal of Catalysis

JF - Journal of Catalysis

ER -

A nickel (II) PY5 complex as an electrocatalyst for water oxidation

Abstract

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