Stable Pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for H2 evolution in acidic electrolyte

Abstract Preparing stable highly dispersed Pt based electrocatalyst is promising to reduce material expense of H2 product via electrocatalytic water splitting. However, it is still a great challenge to obtain stable single atomic Pt catalysts which can be applied in acidic electrolyte. In the presen...

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Autores principales:	Junwei Liang, Yuxiang Liu, Rongzheng Liu, Sufan Zheng, Zhichun Si, Duan Weng, Feiyu Kang
Formato:	article
Lenguaje:	EN
Publicado:	Wiley-VCH 2021
Materias:	acidic electrolyte carbon nanotubes carbon quantum dots H2 evolution Pt atomic clusters Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/3e4c3a10cbc24dc0beecf1550ff303d0
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spelling	oai:doaj.org-article:3e4c3a10cbc24dc0beecf1550ff303d02021-11-10T13:30:46ZStable Pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for H2 evolution in acidic electrolyte2688-401110.1002/nano.202100079https://doaj.org/article/3e4c3a10cbc24dc0beecf1550ff303d02021-11-01T00:00:00Zhttps://doi.org/10.1002/nano.202100079https://doaj.org/toc/2688-4011Abstract Preparing stable highly dispersed Pt based electrocatalyst is promising to reduce material expense of H2 product via electrocatalytic water splitting. However, it is still a great challenge to obtain stable single atomic Pt catalysts which can be applied in acidic electrolyte. In the present work, we synthesized Pt atomic clusters on carbon quantum dots (CQDs) grafting multiwall carbon nanotube (CNT) (Pt content: 1 wt.%) catalysts and then loading the catalysts on carbon cloth (Pt content: 0.01 mg▪cm–2) for activity test. The overpotential of 29 mV versus RHE was obtained over 1%Pt/CQDs/CNT catalysts at the current density of 10 mA▪cm–2, and the Tafel slope of 22 mV decade–1 was obtained, too. Especially, the catalysts showed significant stability in hydrogen evolution reactions (HER) in acidic solution, of which the overpotential was still smaller than that of 20%Pt/C after 10,000 CV cycles. CQDs provided coordinating sites for dispersing Pt atomic clusters and improved the H+ concentration in adjacent area around the Pt clusters. This method provides a general strategy to design the highly efficient electrocatalysts with ultra‐low precious metals for H2 evolution in acidic electrolyte.Junwei LiangYuxiang LiuRongzheng LiuSufan ZhengZhichun SiDuan WengFeiyu KangWiley-VCHarticleacidic electrolytecarbon nanotubescarbon quantum dotsH2 evolutionPt atomic clustersMaterials of engineering and construction. Mechanics of materialsTA401-492ENNano Select, Vol 2, Iss 11, Pp 2126-2134 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acidic electrolyte carbon nanotubes carbon quantum dots H2 evolution Pt atomic clusters Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	acidic electrolyte carbon nanotubes carbon quantum dots H2 evolution Pt atomic clusters Materials of engineering and construction. Mechanics of materials TA401-492 Junwei Liang Yuxiang Liu Rongzheng Liu Sufan Zheng Zhichun Si Duan Weng Feiyu Kang Stable Pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for H2 evolution in acidic electrolyte
description	Abstract Preparing stable highly dispersed Pt based electrocatalyst is promising to reduce material expense of H2 product via electrocatalytic water splitting. However, it is still a great challenge to obtain stable single atomic Pt catalysts which can be applied in acidic electrolyte. In the present work, we synthesized Pt atomic clusters on carbon quantum dots (CQDs) grafting multiwall carbon nanotube (CNT) (Pt content: 1 wt.%) catalysts and then loading the catalysts on carbon cloth (Pt content: 0.01 mg▪cm–2) for activity test. The overpotential of 29 mV versus RHE was obtained over 1%Pt/CQDs/CNT catalysts at the current density of 10 mA▪cm–2, and the Tafel slope of 22 mV decade–1 was obtained, too. Especially, the catalysts showed significant stability in hydrogen evolution reactions (HER) in acidic solution, of which the overpotential was still smaller than that of 20%Pt/C after 10,000 CV cycles. CQDs provided coordinating sites for dispersing Pt atomic clusters and improved the H+ concentration in adjacent area around the Pt clusters. This method provides a general strategy to design the highly efficient electrocatalysts with ultra‐low precious metals for H2 evolution in acidic electrolyte.
format	article
author	Junwei Liang Yuxiang Liu Rongzheng Liu Sufan Zheng Zhichun Si Duan Weng Feiyu Kang
author_facet	Junwei Liang Yuxiang Liu Rongzheng Liu Sufan Zheng Zhichun Si Duan Weng Feiyu Kang
author_sort	Junwei Liang
title	Stable Pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for H2 evolution in acidic electrolyte
title_short	Stable Pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for H2 evolution in acidic electrolyte
title_full	Stable Pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for H2 evolution in acidic electrolyte
title_fullStr	Stable Pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for H2 evolution in acidic electrolyte
title_full_unstemmed	Stable Pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for H2 evolution in acidic electrolyte
title_sort	stable pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for h2 evolution in acidic electrolyte
publisher	Wiley-VCH
publishDate	2021
url	https://doaj.org/article/3e4c3a10cbc24dc0beecf1550ff303d0
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_version_	1718439975239811072

Stable Pt atomic clusters on carbon nanotubes grafted with carbon quantum dots as electrocatalyst for H2 evolution in acidic electrolyte

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