Efficient hydrogen evolution reaction at the phase transition boundary of polymorphic Mo1−xWxTe2
Phase engineering of two-dimensional transition-metal dichalcogenides (TMDs) has been the subject of considerable interest as it represents a promising strategy for a highly active hydrogen evolution reaction (HER). However, various types of active sites on the basal planes and edges of TMDs have sh...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2022-06-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0092997 |
| _version_ | 1811325517981286400 |
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| author | Jeong Hyo Kim Da Yeon Lee Yonas Assefa Eshete Heejun Yang Suyeon Cho |
| author_facet | Jeong Hyo Kim Da Yeon Lee Yonas Assefa Eshete Heejun Yang Suyeon Cho |
| author_sort | Jeong Hyo Kim |
| collection | DOAJ |
| description | Phase engineering of two-dimensional transition-metal dichalcogenides (TMDs) has been the subject of considerable interest as it represents a promising strategy for a highly active hydrogen evolution reaction (HER). However, various types of active sites on the basal planes and edges of TMDs have shown complicated mechanisms of the HER in TMDs, hindering the systematic engineering of the catalytic activity of TMDs. Here, we report the intrinsic basal-plane activity of a series of TMDs, Mo1−xWxTe2, whose phases can be engineered from semiconducting to metallic states by adjusting the stoichiometric ratio of tungsten atoms (x). Three forms of 2H- (semiconducting) and 1T′-(metallic) Mo1−xWxTe2, bulk, powder, and exfoliated flakes, as well as microreactors, were used to investigate the HER process of the phase-engineered TMDs. The catalytic activity of Mo1−xWxTe2 exhibits the best performance at the phase-transition boundary (i.e., x = 0.09) with a hydrogen conversion rate of 0.692 s−1, which is 10–20 times higher than that of other 2H and 1T′ samples with different x values. Our study provides a novel approach, using the phase-transition boundary, to modify the catalytic activity of polymorphic nanomaterials. |
| first_indexed | 2024-04-13T14:35:41Z |
| format | Article |
| id | doaj.art-23bdabefbb3d4d43abd4ccfdde2011fc |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-04-13T14:35:41Z |
| publishDate | 2022-06-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-23bdabefbb3d4d43abd4ccfdde2011fc2022-12-22T02:43:03ZengAIP Publishing LLCAPL Materials2166-532X2022-06-01106061107061107-810.1063/5.0092997Efficient hydrogen evolution reaction at the phase transition boundary of polymorphic Mo1−xWxTe2Jeong Hyo Kim0Da Yeon Lee1Yonas Assefa Eshete2Heejun Yang3Suyeon Cho4Division of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of KoreaDivision of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of KoreaDepartment of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of KoreaDepartment of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of KoreaDivision of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of KoreaPhase engineering of two-dimensional transition-metal dichalcogenides (TMDs) has been the subject of considerable interest as it represents a promising strategy for a highly active hydrogen evolution reaction (HER). However, various types of active sites on the basal planes and edges of TMDs have shown complicated mechanisms of the HER in TMDs, hindering the systematic engineering of the catalytic activity of TMDs. Here, we report the intrinsic basal-plane activity of a series of TMDs, Mo1−xWxTe2, whose phases can be engineered from semiconducting to metallic states by adjusting the stoichiometric ratio of tungsten atoms (x). Three forms of 2H- (semiconducting) and 1T′-(metallic) Mo1−xWxTe2, bulk, powder, and exfoliated flakes, as well as microreactors, were used to investigate the HER process of the phase-engineered TMDs. The catalytic activity of Mo1−xWxTe2 exhibits the best performance at the phase-transition boundary (i.e., x = 0.09) with a hydrogen conversion rate of 0.692 s−1, which is 10–20 times higher than that of other 2H and 1T′ samples with different x values. Our study provides a novel approach, using the phase-transition boundary, to modify the catalytic activity of polymorphic nanomaterials.http://dx.doi.org/10.1063/5.0092997 |
| spellingShingle | Jeong Hyo Kim Da Yeon Lee Yonas Assefa Eshete Heejun Yang Suyeon Cho Efficient hydrogen evolution reaction at the phase transition boundary of polymorphic Mo1−xWxTe2 APL Materials |
| title | Efficient hydrogen evolution reaction at the phase transition boundary of polymorphic Mo1−xWxTe2 |
| title_full | Efficient hydrogen evolution reaction at the phase transition boundary of polymorphic Mo1−xWxTe2 |
| title_fullStr | Efficient hydrogen evolution reaction at the phase transition boundary of polymorphic Mo1−xWxTe2 |
| title_full_unstemmed | Efficient hydrogen evolution reaction at the phase transition boundary of polymorphic Mo1−xWxTe2 |
| title_short | Efficient hydrogen evolution reaction at the phase transition boundary of polymorphic Mo1−xWxTe2 |
| title_sort | efficient hydrogen evolution reaction at the phase transition boundary of polymorphic mo1 xwxte2 |
| url | http://dx.doi.org/10.1063/5.0092997 |
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