Solvent-free assembly of Co/Fe-containing MOFs derived N-doped mesoporous carbon nanosheets for ORR and HER

Yu Wang; Ying Pan; Liangkui Zhu; Honghao Yu; Bingyi Duan; Runwei Wang; Zongtao Zhang; Shilun Qiu

doi:10.1016/j.carbon.2019.02.002

Solvent-free assembly of Co/Fe-containing MOFs derived N-doped mesoporous carbon nanosheets for ORR and HER

Yu Wang, Ying Pan, Liangkui Zhu, Honghao Yu, Bingyi Duan, Runwei Wang, Zongtao Zhang, Shilun Qiu

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

127 Scopus citations

Abstract

The difficulties in integration of different active sites and structural optimization are huge obstacles in developing multi-functional electrocatalysts. In the present work, a molten salt-assisted solid state assembly strategy is developed to prepare Fe/Co Zn MOFs composites. Subsequent carbonization of these MOFs yields Fe/Co decorated nitrogen doped mesoporous carbon (Fe/Co–NCs). The obtained NCs possess several merits, such as i, Sheet-like structure with high porosity and tubular large mesopores (15 nm); ii, N-doped carbon skeleton; iii, Highly dispersed Fe/Co nanoparticles. Benefit from these structural superiority and the synergy between active sites, Fe/Co-NC showed high activity toward both ORR and HER. Among those, the Fe-NC showed excellent ORR activity, experienced four-electron ORR process showing high onset potential (0.963 V), half-wave potential (0.877 V vs. RHE) and outstanding durability (95% current retention after 20000 s). The Co-NC showed high HER activity, achieving a current density of 10 mA cm −3 with low over potential of 242 mV. The remarkable ORR and HER performance can be mainly attributed to the simultaneous incorporation of multi active centers, i.e. nitrogen moieties and metal species (Fe/Co) to synergistically boost the ORR and HER process, and high porosity to accelerate mass and electron transfer.

Original language	English (US)
Pages (from-to)	671-679
Number of pages	9
Journal	Carbon
Volume	146
DOIs	https://doi.org/10.1016/j.carbon.2019.02.002
State	Published - May 2019
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2021-03-12
Acknowledged KAUST grant number(s): CRG-1-2012-LAI-009
Acknowledgements: This work was financially supported by the National Natural Science Foundation of China (21390394, 21771082 and 21771081), National Basic Research Program of China (2012CB821700 and 2011CB808703), NSFC (21261130584 and 91022030), “111” project (B07016), Award Project of KAUST (CRG-1-2012-LAI-009) and Ministry of Education, Science and Technology Development Center Project (20120061130012).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

General Chemistry

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10.1016/j.carbon.2019.02.002

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@article{7b0b9e17c50c45e5a42a2bc15f750954,

title = "Solvent-free assembly of Co/Fe-containing MOFs derived N-doped mesoporous carbon nanosheets for ORR and HER",

abstract = "The difficulties in integration of different active sites and structural optimization are huge obstacles in developing multi-functional electrocatalysts. In the present work, a molten salt-assisted solid state assembly strategy is developed to prepare Fe/Co Zn MOFs composites. Subsequent carbonization of these MOFs yields Fe/Co decorated nitrogen doped mesoporous carbon (Fe/Co–NCs). The obtained NCs possess several merits, such as i, Sheet-like structure with high porosity and tubular large mesopores (15 nm); ii, N-doped carbon skeleton; iii, Highly dispersed Fe/Co nanoparticles. Benefit from these structural superiority and the synergy between active sites, Fe/Co-NC showed high activity toward both ORR and HER. Among those, the Fe-NC showed excellent ORR activity, experienced four-electron ORR process showing high onset potential (0.963 V), half-wave potential (0.877 V vs. RHE) and outstanding durability (95% current retention after 20000 s). The Co-NC showed high HER activity, achieving a current density of 10 mA cm −3 with low over potential of 242 mV. The remarkable ORR and HER performance can be mainly attributed to the simultaneous incorporation of multi active centers, i.e. nitrogen moieties and metal species (Fe/Co) to synergistically boost the ORR and HER process, and high porosity to accelerate mass and electron transfer.",

author = "Yu Wang and Ying Pan and Liangkui Zhu and Honghao Yu and Bingyi Duan and Runwei Wang and Zongtao Zhang and Shilun Qiu",

note = "KAUST Repository Item: Exported on 2021-03-12 Acknowledged KAUST grant number(s): CRG-1-2012-LAI-009 Acknowledgements: This work was financially supported by the National Natural Science Foundation of China (21390394, 21771082 and 21771081), National Basic Research Program of China (2012CB821700 and 2011CB808703), NSFC (21261130584 and 91022030), “111” project (B07016), Award Project of KAUST (CRG-1-2012-LAI-009) and Ministry of Education, Science and Technology Development Center Project (20120061130012). This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2019",

month = may,

doi = "10.1016/j.carbon.2019.02.002",

language = "English (US)",

volume = "146",

pages = "671--679",

journal = "Carbon",

issn = "0008-6223",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Solvent-free assembly of Co/Fe-containing MOFs derived N-doped mesoporous carbon nanosheets for ORR and HER

AU - Wang, Yu

AU - Pan, Ying

AU - Zhu, Liangkui

AU - Yu, Honghao

AU - Duan, Bingyi

AU - Wang, Runwei

AU - Zhang, Zongtao

AU - Qiu, Shilun

N1 - KAUST Repository Item: Exported on 2021-03-12 Acknowledged KAUST grant number(s): CRG-1-2012-LAI-009 Acknowledgements: This work was financially supported by the National Natural Science Foundation of China (21390394, 21771082 and 21771081), National Basic Research Program of China (2012CB821700 and 2011CB808703), NSFC (21261130584 and 91022030), “111” project (B07016), Award Project of KAUST (CRG-1-2012-LAI-009) and Ministry of Education, Science and Technology Development Center Project (20120061130012). This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2019/5

Y1 - 2019/5

N2 - The difficulties in integration of different active sites and structural optimization are huge obstacles in developing multi-functional electrocatalysts. In the present work, a molten salt-assisted solid state assembly strategy is developed to prepare Fe/Co Zn MOFs composites. Subsequent carbonization of these MOFs yields Fe/Co decorated nitrogen doped mesoporous carbon (Fe/Co–NCs). The obtained NCs possess several merits, such as i, Sheet-like structure with high porosity and tubular large mesopores (15 nm); ii, N-doped carbon skeleton; iii, Highly dispersed Fe/Co nanoparticles. Benefit from these structural superiority and the synergy between active sites, Fe/Co-NC showed high activity toward both ORR and HER. Among those, the Fe-NC showed excellent ORR activity, experienced four-electron ORR process showing high onset potential (0.963 V), half-wave potential (0.877 V vs. RHE) and outstanding durability (95% current retention after 20000 s). The Co-NC showed high HER activity, achieving a current density of 10 mA cm −3 with low over potential of 242 mV. The remarkable ORR and HER performance can be mainly attributed to the simultaneous incorporation of multi active centers, i.e. nitrogen moieties and metal species (Fe/Co) to synergistically boost the ORR and HER process, and high porosity to accelerate mass and electron transfer.

AB - The difficulties in integration of different active sites and structural optimization are huge obstacles in developing multi-functional electrocatalysts. In the present work, a molten salt-assisted solid state assembly strategy is developed to prepare Fe/Co Zn MOFs composites. Subsequent carbonization of these MOFs yields Fe/Co decorated nitrogen doped mesoporous carbon (Fe/Co–NCs). The obtained NCs possess several merits, such as i, Sheet-like structure with high porosity and tubular large mesopores (15 nm); ii, N-doped carbon skeleton; iii, Highly dispersed Fe/Co nanoparticles. Benefit from these structural superiority and the synergy between active sites, Fe/Co-NC showed high activity toward both ORR and HER. Among those, the Fe-NC showed excellent ORR activity, experienced four-electron ORR process showing high onset potential (0.963 V), half-wave potential (0.877 V vs. RHE) and outstanding durability (95% current retention after 20000 s). The Co-NC showed high HER activity, achieving a current density of 10 mA cm −3 with low over potential of 242 mV. The remarkable ORR and HER performance can be mainly attributed to the simultaneous incorporation of multi active centers, i.e. nitrogen moieties and metal species (Fe/Co) to synergistically boost the ORR and HER process, and high porosity to accelerate mass and electron transfer.

UR - http://hdl.handle.net/10754/668087

UR - https://linkinghub.elsevier.com/retrieve/pii/S0008622319301150

UR - http://www.scopus.com/inward/record.url?scp=85062278174&partnerID=8YFLogxK

U2 - 10.1016/j.carbon.2019.02.002

DO - 10.1016/j.carbon.2019.02.002

M3 - Article

SN - 0008-6223

VL - 146

SP - 671

EP - 679

JO - Carbon

JF - Carbon

ER -

Solvent-free assembly of Co/Fe-containing MOFs derived N-doped mesoporous carbon nanosheets for ORR and HER

Abstract

Bibliographical note

ASJC Scopus subject areas

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