Surface Modification of a NiS2 Nanoarray with Ni(OH)2 toward Superior Water Reduction Electrocatalysis in Alkaline Media

Ling Zhang; Ibrahim Saana Amiinu; Xiang Ren; Zhiang Liu; Gu Du; Abdullah M. Asiri; Baozhan Zheng; Xuping Sun

doi:10.1021/acs.inorgchem.7b02466

Surface Modification of a NiS₂ Nanoarray with Ni(OH)₂ toward Superior Water Reduction Electrocatalysis in Alkaline Media

Ling Zhang
, Ibrahim Saana Amiinu
, Xiang Ren
, Zhiang Liu
, Gu Du
, Abdullah M. Asiri
, Baozhan Zheng
, Xuping Sun

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

Abstract

Interface engineering has been demonstrated to be effective in promoting hydrogen evolution reaction (HER) in an alkaline solution. Herein, we report that the HER activity of a NiS₂ nanoarray on a titanium mesh (NiS₂/TM) in alkaline media is greatly boosted by the electrodeposition of Ni(OH)₂ onto NiS₂ [Ni(OH)₂-NiS₂/TM]. Ni(OH)₂-NiS₂/TM only needs an overpotential of 90 mV to deliver 10 mA cm^-2 in 1.0 M KOH. Density functional theory calculations confirm that Ni(OH)₂-NiS₂ has a lower water dissociation free energy and a more optimal hydrogen adsorption free energy than NiS₂.

Original language	English
Pages (from-to)	13651-13654
Number of pages	4
Journal	Inorganic Chemistry
Volume	56
Issue number	22
DOIs	https://doi.org/10.1021/acs.inorgchem.7b02466
Publication status	Published - 20 Nov 2017
Externally published	Yes

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@article{cac7435c94584da1927c447491b9a99b,

title = "Surface Modification of a NiS2 Nanoarray with Ni(OH)2 toward Superior Water Reduction Electrocatalysis in Alkaline Media",

abstract = "Interface engineering has been demonstrated to be effective in promoting hydrogen evolution reaction (HER) in an alkaline solution. Herein, we report that the HER activity of a NiS2 nanoarray on a titanium mesh (NiS2/TM) in alkaline media is greatly boosted by the electrodeposition of Ni(OH)2 onto NiS2 [Ni(OH)2-NiS2/TM]. Ni(OH)2-NiS2/TM only needs an overpotential of 90 mV to deliver 10 mA cm-2 in 1.0 M KOH. Density functional theory calculations confirm that Ni(OH)2-NiS2 has a lower water dissociation free energy and a more optimal hydrogen adsorption free energy than NiS2.",

author = "Ling Zhang and Amiinu, \{Ibrahim Saana\} and Xiang Ren and Zhiang Liu and Gu Du and Asiri, \{Abdullah M.\} and Baozhan Zheng and Xuping Sun",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

month = nov,

day = "20",

doi = "10.1021/acs.inorgchem.7b02466",

language = "English",

volume = "56",

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TY - JOUR

T1 - Surface Modification of a NiS2 Nanoarray with Ni(OH)2 toward Superior Water Reduction Electrocatalysis in Alkaline Media

AU - Zhang, Ling

AU - Amiinu, Ibrahim Saana

AU - Ren, Xiang

AU - Liu, Zhiang

AU - Du, Gu

AU - Asiri, Abdullah M.

AU - Zheng, Baozhan

AU - Sun, Xuping

PY - 2017/11/20

Y1 - 2017/11/20

N2 - Interface engineering has been demonstrated to be effective in promoting hydrogen evolution reaction (HER) in an alkaline solution. Herein, we report that the HER activity of a NiS2 nanoarray on a titanium mesh (NiS2/TM) in alkaline media is greatly boosted by the electrodeposition of Ni(OH)2 onto NiS2 [Ni(OH)2-NiS2/TM]. Ni(OH)2-NiS2/TM only needs an overpotential of 90 mV to deliver 10 mA cm-2 in 1.0 M KOH. Density functional theory calculations confirm that Ni(OH)2-NiS2 has a lower water dissociation free energy and a more optimal hydrogen adsorption free energy than NiS2.

AB - Interface engineering has been demonstrated to be effective in promoting hydrogen evolution reaction (HER) in an alkaline solution. Herein, we report that the HER activity of a NiS2 nanoarray on a titanium mesh (NiS2/TM) in alkaline media is greatly boosted by the electrodeposition of Ni(OH)2 onto NiS2 [Ni(OH)2-NiS2/TM]. Ni(OH)2-NiS2/TM only needs an overpotential of 90 mV to deliver 10 mA cm-2 in 1.0 M KOH. Density functional theory calculations confirm that Ni(OH)2-NiS2 has a lower water dissociation free energy and a more optimal hydrogen adsorption free energy than NiS2.

UR - https://www.scopus.com/pages/publications/85034627532

U2 - 10.1021/acs.inorgchem.7b02466

DO - 10.1021/acs.inorgchem.7b02466

M3 - Article

C2 - 29112422

AN - SCOPUS:85034627532

SN - 0020-1669

VL - 56

SP - 13651

EP - 13654

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 22

ER -

Surface Modification of a NiS₂ Nanoarray with Ni(OH)₂ toward Superior Water Reduction Electrocatalysis in Alkaline Media

Abstract

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