Construction of hydroxide pn junction for water splitting electrocatalysis

Ye Zeng; Zhen Cao; Jizhang Liao; Hanfeng Liang; Binbin Wei; Xun Xu; Haiwang Xu; Jiaxian Zheng; Weijie Zhu; Luigi Cavallo; Zhoucheng Wang

doi:10.1016/j.apcatb.2021.120160

Construction of hydroxide pn junction for water splitting electrocatalysis

Ye Zeng, Zhen Cao, Jizhang Liao, Hanfeng Liang, Binbin Wei, Xun Xu, Haiwang Xu, Jiaxian Zheng, Weijie Zhu, Luigi Cavallo, Zhoucheng Wang

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

94 Scopus citations

Abstract

NiFe oxyhydroxide (NiFe−OH) has shown promising electrocatalytic oxygen evolution reaction (OER) activity. Here we suggest that the performance of NiFe−OH can be further enhanced by constructing pn junction. Using MnCo carbonate hydroxide (MnCo−CH)@NiFe−OH pn junction as a demonstration, we show that upon the construction of pn junction, the electrons flow from n-type NiFe−OH to MnCo−CH, which consequently generates a positively charged region on NiFe−OH. The density function theory calculation reveals that such an electronic property change results in an improved OER energetics. As a result, the MnCo−CH@NiFe−OH pn junction shows significantly enhanced OER performance that is ∼10 and ∼500 times that of NiFe−OH and MnCo−CH (in terms of the OER currents at the overpotential of 270 mV), respectively. Moreover, the pn junction also shows a greatly boosted hydrogen evolution reaction (HER) and therefore the overall water electrolysis activity that outperforms the Pt/C||RuO2 catalysts.

Original language	English (US)
Pages (from-to)	120160
Journal	Applied Catalysis B: Environmental
Volume	292
DOIs	https://doi.org/10.1016/j.apcatb.2021.120160
State	Published - Mar 19 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-04-06
Acknowledgements: This work was supported by the National Natural Science Foundation of China (No. 22075236, 22001081).

ASJC Scopus subject areas

General Environmental Science
Catalysis
Process Chemistry and Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.apcatb.2021.120160

https://repository.kaust.edu.sa/bitstream/10754/668524/1/Revised%20Manuscript%20%281%29.pdf

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@article{9d43a6aedb824bd7816cdbc0d8316a94,

title = "Construction of hydroxide pn junction for water splitting electrocatalysis",

abstract = "NiFe oxyhydroxide (NiFe−OH) has shown promising electrocatalytic oxygen evolution reaction (OER) activity. Here we suggest that the performance of NiFe−OH can be further enhanced by constructing pn junction. Using MnCo carbonate hydroxide (MnCo−CH)@NiFe−OH pn junction as a demonstration, we show that upon the construction of pn junction, the electrons flow from n-type NiFe−OH to MnCo−CH, which consequently generates a positively charged region on NiFe−OH. The density function theory calculation reveals that such an electronic property change results in an improved OER energetics. As a result, the MnCo−CH@NiFe−OH pn junction shows significantly enhanced OER performance that is ∼10 and ∼500 times that of NiFe−OH and MnCo−CH (in terms of the OER currents at the overpotential of 270 mV), respectively. Moreover, the pn junction also shows a greatly boosted hydrogen evolution reaction (HER) and therefore the overall water electrolysis activity that outperforms the Pt/C||RuO2 catalysts.",

author = "Ye Zeng and Zhen Cao and Jizhang Liao and Hanfeng Liang and Binbin Wei and Xun Xu and Haiwang Xu and Jiaxian Zheng and Weijie Zhu and Luigi Cavallo and Zhoucheng Wang",

note = "KAUST Repository Item: Exported on 2021-04-06 Acknowledgements: This work was supported by the National Natural Science Foundation of China (No. 22075236, 22001081).",

year = "2021",

month = mar,

day = "19",

doi = "10.1016/j.apcatb.2021.120160",

language = "English (US)",

volume = "292",

pages = "120160",

journal = "Applied Catalysis B: Environmental",

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TY - JOUR

T1 - Construction of hydroxide pn junction for water splitting electrocatalysis

AU - Zeng, Ye

AU - Cao, Zhen

AU - Liao, Jizhang

AU - Liang, Hanfeng

AU - Wei, Binbin

AU - Xu, Xun

AU - Xu, Haiwang

AU - Zheng, Jiaxian

AU - Zhu, Weijie

AU - Cavallo, Luigi

AU - Wang, Zhoucheng

N1 - KAUST Repository Item: Exported on 2021-04-06 Acknowledgements: This work was supported by the National Natural Science Foundation of China (No. 22075236, 22001081).

PY - 2021/3/19

Y1 - 2021/3/19

N2 - NiFe oxyhydroxide (NiFe−OH) has shown promising electrocatalytic oxygen evolution reaction (OER) activity. Here we suggest that the performance of NiFe−OH can be further enhanced by constructing pn junction. Using MnCo carbonate hydroxide (MnCo−CH)@NiFe−OH pn junction as a demonstration, we show that upon the construction of pn junction, the electrons flow from n-type NiFe−OH to MnCo−CH, which consequently generates a positively charged region on NiFe−OH. The density function theory calculation reveals that such an electronic property change results in an improved OER energetics. As a result, the MnCo−CH@NiFe−OH pn junction shows significantly enhanced OER performance that is ∼10 and ∼500 times that of NiFe−OH and MnCo−CH (in terms of the OER currents at the overpotential of 270 mV), respectively. Moreover, the pn junction also shows a greatly boosted hydrogen evolution reaction (HER) and therefore the overall water electrolysis activity that outperforms the Pt/C||RuO2 catalysts.

AB - NiFe oxyhydroxide (NiFe−OH) has shown promising electrocatalytic oxygen evolution reaction (OER) activity. Here we suggest that the performance of NiFe−OH can be further enhanced by constructing pn junction. Using MnCo carbonate hydroxide (MnCo−CH)@NiFe−OH pn junction as a demonstration, we show that upon the construction of pn junction, the electrons flow from n-type NiFe−OH to MnCo−CH, which consequently generates a positively charged region on NiFe−OH. The density function theory calculation reveals that such an electronic property change results in an improved OER energetics. As a result, the MnCo−CH@NiFe−OH pn junction shows significantly enhanced OER performance that is ∼10 and ∼500 times that of NiFe−OH and MnCo−CH (in terms of the OER currents at the overpotential of 270 mV), respectively. Moreover, the pn junction also shows a greatly boosted hydrogen evolution reaction (HER) and therefore the overall water electrolysis activity that outperforms the Pt/C||RuO2 catalysts.

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U2 - 10.1016/j.apcatb.2021.120160

DO - 10.1016/j.apcatb.2021.120160

M3 - Article

SN - 0926-3373

VL - 292

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JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -

Construction of hydroxide pn junction for water splitting electrocatalysis

Abstract

Bibliographical note

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