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Article: Highly active and stable hybrid catalyst of cobalt-doped FeS2 nanosheets-carbon nanotubes for hydrogen evolution reaction

TitleHighly active and stable hybrid catalyst of cobalt-doped FeS<inf>2</inf> nanosheets-carbon nanotubes for hydrogen evolution reaction
Authors
Issue Date2015
Citation
Journal of the American Chemical Society, 2015, v. 137, n. 4, p. 1587-1592 How to Cite?
AbstractHydrogen evolution reaction (HER) from water through electrocatalysis using cost-effective materials to replace precious Pt catalysts holds great promise for clean energy technologies. In this work we developed a highly active and stable catalyst containing Co doped earth abundant iron pyrite FeS2 nanosheets hybridized with carbon nanotubes (Fe1-xCoxS2/CNT hybrid catalysts) for HER in acidic solutions. The pyrite phase of Fe1-xCoxS2/CNT was characterized by powder X-ray diffraction and absorption spectroscopy. Electrochemical measurements showed a low overpotential of ∼0.12 V at 20 mA/cm2, small Tafel slope of ∼46 mV/decade, and long-term durability over 40 h of HER operation using bulk quantities of Fe0.9Co0.1S2/CNT hybrid catalysts at high loadings (∼7 mg/cm2). Density functional theory calculation revealed that the origin of high catalytic activity stemmed from a large reduction of the kinetic energy barrier of H atom adsorption on FeS2 surface upon Co doping in the iron pyrite structure. It is also found that the high HER catalytic activity of Fe0.9Co0.1S2 hinges on the hybridization with CNTs to impart strong heteroatomic interactions between CNT and Fe0.9Co0.1S2. This work produces the most active HER catalyst based on iron pyrite, suggesting a scalable, low cost, and highly efficient catalyst for hydrogen generation.
Persistent Identifierhttp://hdl.handle.net/10722/334383
ISSN
2023 Impact Factor: 14.4
2023 SCImago Journal Rankings: 5.489
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Di Yan-
dc.contributor.authorGong, Ming-
dc.contributor.authorChou, Hung Lung-
dc.contributor.authorPan, Chun Jern-
dc.contributor.authorChen, Hsin An-
dc.contributor.authorWu, Yingpeng-
dc.contributor.authorLin, Meng Chang-
dc.contributor.authorGuan, Mingyun-
dc.contributor.authorYang, Jiang-
dc.contributor.authorChen, Chun Wei-
dc.contributor.authorWang, Yuh Lin-
dc.contributor.authorHwang, Bing Joe-
dc.contributor.authorChen, Chia Chun-
dc.contributor.authorDai, Hongjie-
dc.date.accessioned2023-10-20T06:47:45Z-
dc.date.available2023-10-20T06:47:45Z-
dc.date.issued2015-
dc.identifier.citationJournal of the American Chemical Society, 2015, v. 137, n. 4, p. 1587-1592-
dc.identifier.issn0002-7863-
dc.identifier.urihttp://hdl.handle.net/10722/334383-
dc.description.abstractHydrogen evolution reaction (HER) from water through electrocatalysis using cost-effective materials to replace precious Pt catalysts holds great promise for clean energy technologies. In this work we developed a highly active and stable catalyst containing Co doped earth abundant iron pyrite FeS2 nanosheets hybridized with carbon nanotubes (Fe1-xCoxS2/CNT hybrid catalysts) for HER in acidic solutions. The pyrite phase of Fe1-xCoxS2/CNT was characterized by powder X-ray diffraction and absorption spectroscopy. Electrochemical measurements showed a low overpotential of ∼0.12 V at 20 mA/cm2, small Tafel slope of ∼46 mV/decade, and long-term durability over 40 h of HER operation using bulk quantities of Fe0.9Co0.1S2/CNT hybrid catalysts at high loadings (∼7 mg/cm2). Density functional theory calculation revealed that the origin of high catalytic activity stemmed from a large reduction of the kinetic energy barrier of H atom adsorption on FeS2 surface upon Co doping in the iron pyrite structure. It is also found that the high HER catalytic activity of Fe0.9Co0.1S2 hinges on the hybridization with CNTs to impart strong heteroatomic interactions between CNT and Fe0.9Co0.1S2. This work produces the most active HER catalyst based on iron pyrite, suggesting a scalable, low cost, and highly efficient catalyst for hydrogen generation.-
dc.languageeng-
dc.relation.ispartofJournal of the American Chemical Society-
dc.titleHighly active and stable hybrid catalyst of cobalt-doped FeS<inf>2</inf> nanosheets-carbon nanotubes for hydrogen evolution reaction-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/ja511572q-
dc.identifier.scopuseid_2-s2.0-84922364334-
dc.identifier.volume137-
dc.identifier.issue4-
dc.identifier.spage1587-
dc.identifier.epage1592-
dc.identifier.eissn1520-5126-
dc.identifier.isiWOS:000349138600034-

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