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240806s2024 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.4c01800
|2 doi
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|a pubmed25n1252.xml
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|a (NLM)39105694
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Xu, Xunqiang
|e verfasserin
|4 aut
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| 245 |
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|a Surface Ammonium Ions Assisted Decoration of Monodisperse Cobalt Nanoparticles on Molybdenum Oxide Films as Efficient Electrocatalysts for Hydrogen Evolution Reaction
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 20.08.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The high expense associated with electrocatalysts poses a challenge to the advancement of a hydrogen-based energy economy. The utilization of nonprecious metal-based electrocatalysts that are easily prepared and cost-effective is imperative for the future sustainability of a hydrogen society. The semiconductive MoO3-x has been identified as a promising nonprecious electrocatalyst for the hydrogen evolution reaction (HER). Nevertheless, enhancing its relatively low electrocatalytic activity toward HER remains a top priority. This study illustrates the manipulation of surface ammonium ions (NH4+) to produce uniform and distinct cobalt nanoparticles (Co NPs) on active MoO3-x supports, resulting in a more effective heterostructured composite electrocatalyst for HER. The presence of NH4+ ions in the MoO3-x film was extensively examined using infrared spectroscopy, X-ray photoelectron spectroscopy, and UV-visible colorimetric techniques. Additionally, the firmly attached NH4+ ions were employed as binding sites to precipitate Co-containing complex ions. Due to the monolayer-like adsorption of NH4+ ions, only a small quantity of Co precipitate was formed, which was subsequently electrochemically transformed into Co atoms that diffused and created well-separated uniform metallic Co nanoparticles (with an average size of less than 10 nm) on the MoO3-x film. The resulting heterostructure displays a 4.5-fold increase in current density for HER compared to the MoO3-x electrocatalyst through electrochemical assessments. The enhanced catalytic activity was ascribed to the optimized adsorption/desorption of the species involved in water reduction at the heterointerfaces and improved charge transfer rates. These nanoheterostructures hold great promise for a variety of applications in heterogeneous electrocatalysis, while the novel approach could potentially direct the creation of more heterostructures
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|a Journal Article
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1 |
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|a Xiao, Yi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Xu, Yuan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Liqiu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shen, Hongxia
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Cheng, Qiong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Bin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Lichun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hong, Soon Hyung
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 40(2024), 33 vom: 20. Aug., Seite 17559-17567
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnas
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| 773 |
1 |
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|g volume:40
|g year:2024
|g number:33
|g day:20
|g month:08
|g pages:17559-17567
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|u http://dx.doi.org/10.1021/acs.langmuir.4c01800
|3 Volltext
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|d 40
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|h 17559-17567
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