Carbon dots-oriented synthesis of fungus-like CoP microspheres as a bifunctional electrocatalyst for efficient overall water splitting

The development and optimization of transition metal-based bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are critical for high-efficient water splitting. Herein, we propose a carbon dots-oriented strategy for fabricating nitrogen-doped c...

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Veröffentlicht in:Carbon (New York) 2021-09, Vol.182, p.327-334
Hauptverfasser: Liu, Hui, Liu, Zihui, Wang, Yang, Zhang, Jinqiang, Yang, Zhongxue, Hu, Han, Zhao, Qingshan, Ning, Hui, Zhi, Linjie, Wu, Mingbo
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container_start_page 327
container_title Carbon (New York)
container_volume 182
creator Liu, Hui
Liu, Zihui
Wang, Yang
Zhang, Jinqiang
Yang, Zhongxue
Hu, Han
Zhao, Qingshan
Ning, Hui
Zhi, Linjie
Wu, Mingbo
description The development and optimization of transition metal-based bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are critical for high-efficient water splitting. Herein, we propose a carbon dots-oriented strategy for fabricating nitrogen-doped carbon dots/fungus-like CoP microsphere composite on Ni foam (CoP-NCDs/NF). Owing to its unique structure and the strong interactions between carbon dots and CoP, the newly developed CoP-NCDs/NF electrode exhibits significantly enhanced HER and OER bifunctional catalytic activities, with overpotentials as low as 103 and 226 mV at a current density of 10 mA cm−2, respectively. Accordingly, the CoP-NCDs/NF displays excellent overall water splitting performance with a low cell voltage of 1.55 V at 10 mA cm−2 and great stability in a two-electrode alkaline electrolyzer. This study provides an alternative pathway on rationally designing and fabricating carbon dots-based materials for high performance water electrolysis and other energy conversion fields. [Display omitted] •Fungus-like CoP microspheres were synthesized via a CDs-oriented method.•The CoP-NCDs/NF electrode exhibited improved electrocatalytic performance in HER, OER and overall water splitting.•The unique structure and the strong interactions contributed to the excellent electrocatalytic activity.
doi_str_mv 10.1016/j.carbon.2021.06.029
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Herein, we propose a carbon dots-oriented strategy for fabricating nitrogen-doped carbon dots/fungus-like CoP microsphere composite on Ni foam (CoP-NCDs/NF). Owing to its unique structure and the strong interactions between carbon dots and CoP, the newly developed CoP-NCDs/NF electrode exhibits significantly enhanced HER and OER bifunctional catalytic activities, with overpotentials as low as 103 and 226 mV at a current density of 10 mA cm−2, respectively. Accordingly, the CoP-NCDs/NF displays excellent overall water splitting performance with a low cell voltage of 1.55 V at 10 mA cm−2 and great stability in a two-electrode alkaline electrolyzer. This study provides an alternative pathway on rationally designing and fabricating carbon dots-based materials for high performance water electrolysis and other energy conversion fields. [Display omitted] •Fungus-like CoP microspheres were synthesized via a CDs-oriented method.•The CoP-NCDs/NF electrode exhibited improved electrocatalytic performance in HER, OER and overall water splitting.•The unique structure and the strong interactions contributed to the excellent electrocatalytic activity.</description><identifier>ISSN: 0008-6223</identifier><identifier>EISSN: 1873-3891</identifier><identifier>DOI: 10.1016/j.carbon.2021.06.029</identifier><language>eng</language><publisher>New York: Elsevier Ltd</publisher><subject>Carbon ; Carbon dots ; Chemical reactions ; Electrocatalysis ; Electrocatalysts ; Electrolysis ; Energy conversion ; Fungi ; Hydrogen evolution reaction ; Hydrogen evolution reactions ; Metal foams ; Microspheres ; Nanotubes ; Optimization ; Overall water splitting ; Oxygen evolution reaction ; Oxygen evolution reactions ; Quantum dots ; Transition metal phosphide ; Transition metals ; Water splitting</subject><ispartof>Carbon (New York), 2021-09, Vol.182, p.327-334</ispartof><rights>2021 Elsevier Ltd</rights><rights>Copyright Elsevier BV Sep 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c330t-4c56fa8a8b3a6f92dc1c4d60d20384c650dfc2200839cd2b5bc31e5fa10879ce3</citedby><cites>FETCH-LOGICAL-c330t-4c56fa8a8b3a6f92dc1c4d60d20384c650dfc2200839cd2b5bc31e5fa10879ce3</cites><orcidid>0000-0003-0048-778X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.carbon.2021.06.029$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Liu, Hui</creatorcontrib><creatorcontrib>Liu, Zihui</creatorcontrib><creatorcontrib>Wang, Yang</creatorcontrib><creatorcontrib>Zhang, Jinqiang</creatorcontrib><creatorcontrib>Yang, Zhongxue</creatorcontrib><creatorcontrib>Hu, Han</creatorcontrib><creatorcontrib>Zhao, Qingshan</creatorcontrib><creatorcontrib>Ning, Hui</creatorcontrib><creatorcontrib>Zhi, Linjie</creatorcontrib><creatorcontrib>Wu, Mingbo</creatorcontrib><title>Carbon dots-oriented synthesis of fungus-like CoP microspheres as a bifunctional electrocatalyst for efficient overall water splitting</title><title>Carbon (New York)</title><description>The development and optimization of transition metal-based bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are critical for high-efficient water splitting. Herein, we propose a carbon dots-oriented strategy for fabricating nitrogen-doped carbon dots/fungus-like CoP microsphere composite on Ni foam (CoP-NCDs/NF). Owing to its unique structure and the strong interactions between carbon dots and CoP, the newly developed CoP-NCDs/NF electrode exhibits significantly enhanced HER and OER bifunctional catalytic activities, with overpotentials as low as 103 and 226 mV at a current density of 10 mA cm−2, respectively. Accordingly, the CoP-NCDs/NF displays excellent overall water splitting performance with a low cell voltage of 1.55 V at 10 mA cm−2 and great stability in a two-electrode alkaline electrolyzer. This study provides an alternative pathway on rationally designing and fabricating carbon dots-based materials for high performance water electrolysis and other energy conversion fields. 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subjects Carbon
Carbon dots
Chemical reactions
Electrocatalysis
Electrocatalysts
Electrolysis
Energy conversion
Fungi
Hydrogen evolution reaction
Hydrogen evolution reactions
Metal foams
Microspheres
Nanotubes
Optimization
Overall water splitting
Oxygen evolution reaction
Oxygen evolution reactions
Quantum dots
Transition metal phosphide
Transition metals
Water splitting
title Carbon dots-oriented synthesis of fungus-like CoP microspheres as a bifunctional electrocatalyst for efficient overall water splitting
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