Ruthenium single atoms implanted continuous MoS2-Mo2C heterostructure for high-performance and stable water splitting
Article
Article Title | Ruthenium single atoms implanted continuous MoS2-Mo2C heterostructure for high-performance and stable water splitting |
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ERA Journal ID | 201288 |
Article Category | Article |
Authors | Hoa, Van Hien (Author), Tran, Duy Thanh (Author), Prabhakaran, Sampath (Author), Kim, Do Hwan (Author), Hameed, Nishar (Author), Wang, Hao (Author), Kim, Nam Hoon (Author) and Lee, Joong Hee (Author) |
Journal Title | Nano Energy |
Journal Citation | 88, pp. 1-11 |
Article Number | 106277 |
Number of Pages | 11 |
Year | 2021 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 2211-2855 |
2211-3282 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.nanoen.2021.106277 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S2211285521005322 |
Abstract | Merging metal single atoms into a nanostructure is a novel approach to motivate the number and types of active centers for boosting catalytic activities towards both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in water splitting. Herein, we reported a continuous molybdenum sulfide-carbide heterostructure-based nanosheets incorporated with ruthenium atoms (2.02 at%) and shelled over high-conductive 1D titanium nitride nanorod arrays (Ru-MoS2-Mo2C/TiN) to form a 3D hierarchical porous material via an effective synthesis strategy. The material with fine-tuned electronic structure and multi-integrated active sites exhibited small overpotentials of 25 and 280 mV at 10 mA cm(-2) for HER and OER in 1.0 M KOH medium, respectively. An electrolyzer delivered from Ru-MoS2-Mo2C/TiN required an operating voltage of only 1.49 V at 10 mA cm(-2), surpassing that of a commercial catalyst-based system as well as earlier reports. The good performance was identified by its enlarged electroactive surface area and superior charge-transfer ability. In addition, theoretical calculations further showed its reasonable density of states near the Fermi level together with optimum adsorption free energy for reactants. The result indicated that the Ru-MoS2-Mo2C/TiN on CC is an excellent bifunctional electrocatalyst for hydrogen production by electrochemical water splitting. |
Keywords | Ruthenium atoms; MoS2-Mo2C heterostructures; Bifunctional electrocatalyst; Water splitting |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
Byline Affiliations | Jeonbuk National University, Korea |
Swinburne University of Technology | |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6zww/ruthenium-single-atoms-implanted-continuous-mos2-mo2c-heterostructure-for-high-performance-and-stable-water-splitting
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