https://scholars.lib.ntu.edu.tw/handle/123456789/616362
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | Chang Y.S. | en_US |
dc.contributor.author | Chen C.Y. | en_US |
dc.contributor.author | Ho C.J. | en_US |
dc.contributor.author | Chen H.R. | en_US |
dc.contributor.author | Fu T.Y. | en_US |
dc.contributor.author | Huang Y.T. | en_US |
dc.contributor.author | Du H.Y. | en_US |
dc.contributor.author | Lee K.Y. | en_US |
dc.contributor.author | Chao L.C. | en_US |
dc.contributor.author | Chen L.C. | en_US |
dc.contributor.author | Chen K.H. | en_US |
dc.contributor.author | Chu Y.W. | en_US |
dc.contributor.author | Chen R.S. | en_US |
dc.contributor.author | LI-CHYONG CHEN | zz |
dc.creator | Chang Y.S.; Chen C.Y.; Ho C.J.; Cheng C.M.; Chen H.R.; Fu T.Y.; Huang Y.T.; Ke S.W.; Du H.Y.; Lee K.Y.; Chao L.C.; Chen L.C.; Chen K.H.; Chu Y.W.; Chen R.S. | - |
dc.date.accessioned | 2022-08-09T03:50:14Z | - |
dc.date.available | 2022-08-09T03:50:14Z | - |
dc.date.issued | 2021 | - |
dc.identifier.issn | 22112855 | - |
dc.identifier.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102398384&doi=10.1016%2fj.nanoen.2021.105922&partnerID=40&md5=dbb18473c7308f86740cb70414f70799 | - |
dc.identifier.uri | https://scholars.lib.ntu.edu.tw/handle/123456789/616362 | - |
dc.description.abstract | The spontaneous formation of surface electron accumulation (SEA) was observed in synthesized molybdenum diselenide (MoSe2) layered crystals with two-hexagonal (2 H) structure. An anomalously high electron concentration at the surface up to 1019 cm−3 is several orders of magnitude higher than that (3.6 × 1012 cm−3) of the inner bulk. The SEA is found to be generated easily by mechanical exfoliation and room temperature deselenization. Se-vacancies have been confirmed to be the major source resulting in SEA and n-type conductivity, and also the active sites for electrochemical catalysis in MoSe2. Noted that the SEA conjugated with the Se-vacancy-related surface defects enhances the electrochemical hydrogen evolution reaction (HER) activity substantially. The optimized HER efficiency with an overpotential at 0.17 V and Tafel slope at 60 mV/dec of the basal plane of 2 H-MoSe2 was achieved by the nitrogen plasma treatment, which has outperformed several nanostructures, thin films, and hybrid counterparts. This study reveals the intriguing surface-dominant electronic property and its effect on the HER enhancement of the basal plane, which is crucial for development of a stable, low-cost and highly efficient catalyst using 2 H-MoSe2. © 2021 Elsevier Ltd | - |
dc.language | en_US | - |
dc.relation.ispartof | Nano Energy | - |
dc.subject | Angle-resolved photoemission spectroscopy;Hydrogen evolution reaction;Molybdenum diselenide;Scanning tunneling microscopy;Selenium vacancy;Surface electron accumulation | - |
dc.subject.other | Crystal structure;Electronic properties;Molybdenum compounds;Nitrogen plasma;Photoelectron spectroscopy;Plasma applications;Scanning tunneling microscopy;Selenium compounds;Surface defects;Angle resolved photoemission spectroscopy;Basal planes;Basal-planes;Hydrogen evolution reactions;Layered crystals;Molybdenum diselenide;Selenia vacancy;Spontaneous formation;Surface electron accumulation;Synthesised;Electrons | - |
dc.title | Surface electron accumulation and enhanced hydrogen evolution reaction in MoSe2 basal planes | en_US |
dc.type | journal article | en |
dc.identifier.doi | 10.1016/j.nanoen.2021.105922 | - |
dc.identifier.scopus | 2-s2.0-85102398384 | - |
dc.relation.journalvolume | 84 | - |
item.openairetype | journal article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.cerifentitytype | Publications | - |
item.fulltext | no fulltext | - |
item.grantfulltext | none | - |
crisitem.author.dept | Center for Condensed Matter Sciences | - |
crisitem.author.parentorg | Others: University-Level Research Centers | - |
顯示於: | 凝態科學研究中心 |
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