Stable Cobalt Nanoparticles and Their Monolayer Array as an Efficient Electrocatalyst for Oxygen Evolution Reaction

Liheng Wu; Qing Li; Cheng Hao Wu; Huiyuan Zhu; Adriana Mendoza-Garcia; Bo Shen; Jinghua Guo; Shouheng Sun

doi:10.1021/jacs.5b04142

Stable Cobalt Nanoparticles and Their Monolayer Array as an Efficient Electrocatalyst for Oxygen Evolution Reaction

Liheng Wu
, Qing Li
, Cheng Hao Wu
, Huiyuan Zhu
, Adriana Mendoza-Garcia
, Bo Shen
, Jinghua Guo
, Shouheng Sun

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

315 Citations (Scopus)

Abstract

Monodisperse cobalt (Co) nanoparticles (NPs) were synthesized and stabilized against oxidation via reductive annealing at 600°C. The stable Co NPs are active for catalyzing the oxygen evolution reaction (OER) in 0.1 M KOH, producing a current density of 10 mA/cm² at an overpotential of 0.39 V (1.62 V vs RHE, no iR-correction). Their catalysis is superior to the commercial Ir catalyst in both activity and stability. These Co NPs are also assembled into a monolayer array on the working electrode, allowing the detailed study of their intrinsic OER activity. The Co NPs in the monolayer array show 15 times higher turnover frequency (2.13 s^-1) and mass activity (1949 A/g) than the NPs deposited on conventional carbon black (0.14 s^-1 and 126 A/g, respectively) at an overpotential of 0.4 V. These stable Co NPs are a promising new class of noble-metal-free catalyst for water splitting. © 2015 American Chemical Society.

Original language	English
Pages (from-to)	7071-7074
Journal	Journal of the American Chemical Society
Volume	137
Issue number	22
DOIs	https://doi.org/10.1021/jacs.5b04142
Publication status	Published - 10 Jun 2015
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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title = "Stable Cobalt Nanoparticles and Their Monolayer Array as an Efficient Electrocatalyst for Oxygen Evolution Reaction",

abstract = "Monodisperse cobalt (Co) nanoparticles (NPs) were synthesized and stabilized against oxidation via reductive annealing at 600°C. The stable Co NPs are active for catalyzing the oxygen evolution reaction (OER) in 0.1 M KOH, producing a current density of 10 mA/cm2 at an overpotential of 0.39 V (1.62 V vs RHE, no iR-correction). Their catalysis is superior to the commercial Ir catalyst in both activity and stability. These Co NPs are also assembled into a monolayer array on the working electrode, allowing the detailed study of their intrinsic OER activity. The Co NPs in the monolayer array show 15 times higher turnover frequency (2.13 s-1) and mass activity (1949 A/g) than the NPs deposited on conventional carbon black (0.14 s-1 and 126 A/g, respectively) at an overpotential of 0.4 V. These stable Co NPs are a promising new class of noble-metal-free catalyst for water splitting. {\textcopyright} 2015 American Chemical Society.",

author = "Liheng Wu and Qing Li and Wu, \{Cheng Hao\} and Huiyuan Zhu and Adriana Mendoza-Garcia and Bo Shen and Jinghua Guo and Shouheng Sun",

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TY - JOUR

T1 - Stable Cobalt Nanoparticles and Their Monolayer Array as an Efficient Electrocatalyst for Oxygen Evolution Reaction

AU - Wu, Liheng

AU - Li, Qing

AU - Wu, Cheng Hao

AU - Zhu, Huiyuan

AU - Mendoza-Garcia, Adriana

AU - Shen, Bo

AU - Guo, Jinghua

AU - Sun, Shouheng

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2015/6/10

Y1 - 2015/6/10

N2 - Monodisperse cobalt (Co) nanoparticles (NPs) were synthesized and stabilized against oxidation via reductive annealing at 600°C. The stable Co NPs are active for catalyzing the oxygen evolution reaction (OER) in 0.1 M KOH, producing a current density of 10 mA/cm2 at an overpotential of 0.39 V (1.62 V vs RHE, no iR-correction). Their catalysis is superior to the commercial Ir catalyst in both activity and stability. These Co NPs are also assembled into a monolayer array on the working electrode, allowing the detailed study of their intrinsic OER activity. The Co NPs in the monolayer array show 15 times higher turnover frequency (2.13 s-1) and mass activity (1949 A/g) than the NPs deposited on conventional carbon black (0.14 s-1 and 126 A/g, respectively) at an overpotential of 0.4 V. These stable Co NPs are a promising new class of noble-metal-free catalyst for water splitting. © 2015 American Chemical Society.

AB - Monodisperse cobalt (Co) nanoparticles (NPs) were synthesized and stabilized against oxidation via reductive annealing at 600°C. The stable Co NPs are active for catalyzing the oxygen evolution reaction (OER) in 0.1 M KOH, producing a current density of 10 mA/cm2 at an overpotential of 0.39 V (1.62 V vs RHE, no iR-correction). Their catalysis is superior to the commercial Ir catalyst in both activity and stability. These Co NPs are also assembled into a monolayer array on the working electrode, allowing the detailed study of their intrinsic OER activity. The Co NPs in the monolayer array show 15 times higher turnover frequency (2.13 s-1) and mass activity (1949 A/g) than the NPs deposited on conventional carbon black (0.14 s-1 and 126 A/g, respectively) at an overpotential of 0.4 V. These stable Co NPs are a promising new class of noble-metal-free catalyst for water splitting. © 2015 American Chemical Society.

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UR - https://www.scopus.com/pages/publications/84935830980#tab=impact

U2 - 10.1021/jacs.5b04142

DO - 10.1021/jacs.5b04142

M3 - RGC 21 - Publication in refereed journal

SN - 0002-7863

VL - 137

SP - 7071

EP - 7074

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 22

ER -

Stable Cobalt Nanoparticles and Their Monolayer Array as an Efficient Electrocatalyst for Oxygen Evolution Reaction

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