Cobalt phosphide nanorods as an efficient electrocatalyst for the hydrogen evolution reaction

Zhipeng Huang; Zhongzhong Chen; Zhibo Chen; Cuncai Lv; Mark G. Humphrey; Chi Zhang

doi:10.1016/j.nanoen.2014.08.013

Cobalt phosphide nanorods as an efficient electrocatalyst for the hydrogen evolution reaction

Zhipeng Huang^*, Zhongzhong Chen, Zhibo Chen, Cuncai Lv, Mark G. Humphrey, Chi Zhang

^*Corresponding author for this work

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

474 Citations (Scopus)

Abstract

Cobalt phosphide (Co₂P) nanorods are found to exhibit efficient catalytic activity for the hydrogen evolution reaction (HER), with the overpotential required for the current density of 20mA/cm² as small as 167mV in acidic solution and 171mV in basic solution. In addition, the Co₂P nanorods can work stably in both acidic and basic solution during hydrogen production. This performance can be favorably compared to typical high efficient non-precious catalysts, and suggests the promising application potential of Co₂P nanorods in the field of hydrogen production. The HER process follows a Volmer-Heyrovsky mechanism, and the rates of the discharge step and desorption step appear to be comparable during the HER process. The similarity of charged natures of Co and P in the Co₂P nanorods to those of the hydride-acceptor and proton-acceptor in highly efficient Ni₂P catalysts, [NiFe] hydrogenase, and its analogues implies that the HER catalytic activity of the Co₂P nanorods might be correlated with the charged natures of Co and P.

Original language	English
Pages (from-to)	373-382
Number of pages	10
Journal	Nano Energy
Volume	9
DOIs	https://doi.org/10.1016/j.nanoen.2014.08.013
Publication status	Published - 1 Oct 2014

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title = "Cobalt phosphide nanorods as an efficient electrocatalyst for the hydrogen evolution reaction",

abstract = "Cobalt phosphide (Co2P) nanorods are found to exhibit efficient catalytic activity for the hydrogen evolution reaction (HER), with the overpotential required for the current density of 20mA/cm2 as small as 167mV in acidic solution and 171mV in basic solution. In addition, the Co2P nanorods can work stably in both acidic and basic solution during hydrogen production. This performance can be favorably compared to typical high efficient non-precious catalysts, and suggests the promising application potential of Co2P nanorods in the field of hydrogen production. The HER process follows a Volmer-Heyrovsky mechanism, and the rates of the discharge step and desorption step appear to be comparable during the HER process. The similarity of charged natures of Co and P in the Co2P nanorods to those of the hydride-acceptor and proton-acceptor in highly efficient Ni2P catalysts, [NiFe] hydrogenase, and its analogues implies that the HER catalytic activity of the Co2P nanorods might be correlated with the charged natures of Co and P.",

keywords = "Cobalt phosphide, Electrocatalyst, Hydrogen generation, Nanorod",

author = "Zhipeng Huang and Zhongzhong Chen and Zhibo Chen and Cuncai Lv and Humphrey, {Mark G.} and Chi Zhang",

note = "Publisher Copyright: {\textcopyright} 2014.",

year = "2014",

month = oct,

day = "1",

doi = "10.1016/j.nanoen.2014.08.013",

language = "English",

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T1 - Cobalt phosphide nanorods as an efficient electrocatalyst for the hydrogen evolution reaction

AU - Huang, Zhipeng

AU - Chen, Zhongzhong

AU - Chen, Zhibo

AU - Lv, Cuncai

AU - Humphrey, Mark G.

AU - Zhang, Chi

PY - 2014/10/1

Y1 - 2014/10/1

N2 - Cobalt phosphide (Co2P) nanorods are found to exhibit efficient catalytic activity for the hydrogen evolution reaction (HER), with the overpotential required for the current density of 20mA/cm2 as small as 167mV in acidic solution and 171mV in basic solution. In addition, the Co2P nanorods can work stably in both acidic and basic solution during hydrogen production. This performance can be favorably compared to typical high efficient non-precious catalysts, and suggests the promising application potential of Co2P nanorods in the field of hydrogen production. The HER process follows a Volmer-Heyrovsky mechanism, and the rates of the discharge step and desorption step appear to be comparable during the HER process. The similarity of charged natures of Co and P in the Co2P nanorods to those of the hydride-acceptor and proton-acceptor in highly efficient Ni2P catalysts, [NiFe] hydrogenase, and its analogues implies that the HER catalytic activity of the Co2P nanorods might be correlated with the charged natures of Co and P.

AB - Cobalt phosphide (Co2P) nanorods are found to exhibit efficient catalytic activity for the hydrogen evolution reaction (HER), with the overpotential required for the current density of 20mA/cm2 as small as 167mV in acidic solution and 171mV in basic solution. In addition, the Co2P nanorods can work stably in both acidic and basic solution during hydrogen production. This performance can be favorably compared to typical high efficient non-precious catalysts, and suggests the promising application potential of Co2P nanorods in the field of hydrogen production. The HER process follows a Volmer-Heyrovsky mechanism, and the rates of the discharge step and desorption step appear to be comparable during the HER process. The similarity of charged natures of Co and P in the Co2P nanorods to those of the hydride-acceptor and proton-acceptor in highly efficient Ni2P catalysts, [NiFe] hydrogenase, and its analogues implies that the HER catalytic activity of the Co2P nanorods might be correlated with the charged natures of Co and P.

KW - Cobalt phosphide

KW - Electrocatalyst

KW - Hydrogen generation

KW - Nanorod

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U2 - 10.1016/j.nanoen.2014.08.013

DO - 10.1016/j.nanoen.2014.08.013

M3 - Article

SN - 2211-2855

VL - 9

SP - 373

EP - 382

JO - Nano Energy

JF - Nano Energy

ER -

Cobalt phosphide nanorods as an efficient electrocatalyst for the hydrogen evolution reaction

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