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Vertically oriented MoS2/WS2 heterostructures on reduced graphene oxide sheets as electrocatalysts for hydrogen evolution reaction
Significant efforts in the catalytic applications of transition metal dichalcogenides (TMDs) have been made, primarily focused on the design and synthesis of their vertically aligned structures, including expanded interlayer spacing, to pursue the maximized exposure of active edge sites. However, ve...
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Published in: | Materials chemistry frontiers 2021-04, Vol.5 (8), p.3396-3403 |
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creator | Lee, Hoon Ju Suk Woo Lee Hwang, Hyuntae Seong In Yoon Lee, Zonghoon Shin, Hyeon Suk |
description | Significant efforts in the catalytic applications of transition metal dichalcogenides (TMDs) have been made, primarily focused on the design and synthesis of their vertically aligned structures, including expanded interlayer spacing, to pursue the maximized exposure of active edge sites. However, vertically aligned TMD heterostructures are rare. In this work, we demonstrate vertical MoS2/WS2 heterostructures on reduced graphene oxide sheets (MoS2/WS2/rGO) by a one-pot synthesis, which show a high catalytic activity for the hydrogen evolution reaction (HER). The vertically aligned heterostructures were characterized by Raman spectroscopy, transmission electron microscopy, and energy dispersion spectroscopy. Compared with MoS2/rGO (with an onset potential of −125 mV and a Tafel slope of 81 mV dec−1), MoS2/WS2/rGO exhibited a much enhanced electrochemical HER performance with an onset potential of −113 mV and a Tafel slope of 44 mV dec−1. The electrochemical impedance results suggest that the enhanced catalytic activity of MoS2/WS2/rGO can be attributed to fast electron transfer in the TMD heterostructure. This work suggests great potential for TMD-based (photo)electrocatalysts through modification of their morphology and interlayer spacing. |
doi_str_mv | 10.1039/d1qm00051a |
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However, vertically aligned TMD heterostructures are rare. In this work, we demonstrate vertical MoS2/WS2 heterostructures on reduced graphene oxide sheets (MoS2/WS2/rGO) by a one-pot synthesis, which show a high catalytic activity for the hydrogen evolution reaction (HER). The vertically aligned heterostructures were characterized by Raman spectroscopy, transmission electron microscopy, and energy dispersion spectroscopy. Compared with MoS2/rGO (with an onset potential of −125 mV and a Tafel slope of 81 mV dec−1), MoS2/WS2/rGO exhibited a much enhanced electrochemical HER performance with an onset potential of −113 mV and a Tafel slope of 44 mV dec−1. The electrochemical impedance results suggest that the enhanced catalytic activity of MoS2/WS2/rGO can be attributed to fast electron transfer in the TMD heterostructure. 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This work suggests great potential for TMD-based (photo)electrocatalysts through modification of their morphology and interlayer spacing.</description><subject>Catalytic activity</subject><subject>Chemical synthesis</subject><subject>Electrocatalysts</subject><subject>Electron transfer</subject><subject>Graphene</subject><subject>Heterostructures</subject><subject>Hydrogen evolution reactions</subject><subject>Interlayers</subject><subject>Molybdenum disulfide</subject><subject>Morphology</subject><subject>Raman spectroscopy</subject><subject>Sheets</subject><subject>Spectrum analysis</subject><subject>Transition metal compounds</subject><subject>Tungsten disulfide</subject><issn>2052-1537</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNotj8lqwzAYhEWh0JDm0icQ9OxGu61jCd0gpYd0OQZZ-hU7uJYjyaW59snrLqcZhuEbBqELSq4o4Xrp6OGdECKpOUEzRiQrqOTlGVqktJ9yWpaMEzpDX68Qc2tN1x1xiC30GRx-DBu2fNsw3ECGGFKOo81jhIRDjyO40U6lXTRDAz3g8Nk6wKkByAmbhKEDm2OwJpvumKbMh4ibo4thBz2Gj9CNuf0FGftjztGpN12Cxb_O0cvtzfPqvlg_3T2srtfFQCnPhalqYax32teiYqX1VamJktwpOd1TXlKtPQgmiauMI1QASGdcpYQSVteez9HlH3eI4TBCytt9GGM_TW6ZpEJXnHHFvwF5ZWNk</recordid><startdate>20210421</startdate><enddate>20210421</enddate><creator>Lee, Hoon Ju</creator><creator>Suk Woo Lee</creator><creator>Hwang, Hyuntae</creator><creator>Seong In Yoon</creator><creator>Lee, Zonghoon</creator><creator>Shin, Hyeon Suk</creator><general>Royal Society of Chemistry</general><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20210421</creationdate><title>Vertically oriented MoS2/WS2 heterostructures on reduced graphene oxide sheets as electrocatalysts for hydrogen evolution reaction</title><author>Lee, Hoon Ju ; Suk Woo Lee ; Hwang, Hyuntae ; Seong In Yoon ; Lee, Zonghoon ; Shin, Hyeon Suk</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p113t-a8b4acfd9fb4827cf8790653d650526f5199fe4250d8ad014ee5dad86464c9bf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Catalytic activity</topic><topic>Chemical synthesis</topic><topic>Electrocatalysts</topic><topic>Electron transfer</topic><topic>Graphene</topic><topic>Heterostructures</topic><topic>Hydrogen evolution reactions</topic><topic>Interlayers</topic><topic>Molybdenum disulfide</topic><topic>Morphology</topic><topic>Raman spectroscopy</topic><topic>Sheets</topic><topic>Spectrum analysis</topic><topic>Transition metal compounds</topic><topic>Tungsten disulfide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lee, Hoon Ju</creatorcontrib><creatorcontrib>Suk Woo Lee</creatorcontrib><creatorcontrib>Hwang, Hyuntae</creatorcontrib><creatorcontrib>Seong In Yoon</creatorcontrib><creatorcontrib>Lee, Zonghoon</creatorcontrib><creatorcontrib>Shin, Hyeon Suk</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials chemistry frontiers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lee, Hoon Ju</au><au>Suk Woo Lee</au><au>Hwang, Hyuntae</au><au>Seong In Yoon</au><au>Lee, Zonghoon</au><au>Shin, Hyeon Suk</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Vertically oriented MoS2/WS2 heterostructures on reduced graphene oxide sheets as electrocatalysts for hydrogen evolution reaction</atitle><jtitle>Materials chemistry frontiers</jtitle><date>2021-04-21</date><risdate>2021</risdate><volume>5</volume><issue>8</issue><spage>3396</spage><epage>3403</epage><pages>3396-3403</pages><eissn>2052-1537</eissn><abstract>Significant efforts in the catalytic applications of transition metal dichalcogenides (TMDs) have been made, primarily focused on the design and synthesis of their vertically aligned structures, including expanded interlayer spacing, to pursue the maximized exposure of active edge sites. However, vertically aligned TMD heterostructures are rare. In this work, we demonstrate vertical MoS2/WS2 heterostructures on reduced graphene oxide sheets (MoS2/WS2/rGO) by a one-pot synthesis, which show a high catalytic activity for the hydrogen evolution reaction (HER). The vertically aligned heterostructures were characterized by Raman spectroscopy, transmission electron microscopy, and energy dispersion spectroscopy. Compared with MoS2/rGO (with an onset potential of −125 mV and a Tafel slope of 81 mV dec−1), MoS2/WS2/rGO exhibited a much enhanced electrochemical HER performance with an onset potential of −113 mV and a Tafel slope of 44 mV dec−1. The electrochemical impedance results suggest that the enhanced catalytic activity of MoS2/WS2/rGO can be attributed to fast electron transfer in the TMD heterostructure. This work suggests great potential for TMD-based (photo)electrocatalysts through modification of their morphology and interlayer spacing.</abstract><cop>London</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/d1qm00051a</doi><tpages>8</tpages></addata></record> |
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subjects | Catalytic activity Chemical synthesis Electrocatalysts Electron transfer Graphene Heterostructures Hydrogen evolution reactions Interlayers Molybdenum disulfide Morphology Raman spectroscopy Sheets Spectrum analysis Transition metal compounds Tungsten disulfide |
title | Vertically oriented MoS2/WS2 heterostructures on reduced graphene oxide sheets as electrocatalysts for hydrogen evolution reaction |
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