التفاصيل البيبلوغرافية
| العنوان: |
Crucial Role of Metal Coordination Number in Optimizing Electrocatalyst Activity of Holey Large-Area 2D Ru Nanosheets. |
| المؤلفون: |
Jin X; Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea.; Department of Applied Chemistry, University of Seoul, Seoul 02504, Republic of Korea., Kwon SJ; Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea., Kim MG; PLS-II Beamline Division, PLS-II Department, Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea., Kim M; Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea., Hwang SJ; Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea. |
| المصدر: |
ACS nano [ACS Nano] 2024 Jun 11; Vol. 18 (23), pp. 15194-15203. Date of Electronic Publication: 2024 May 30. |
| نوع المنشور: |
Journal Article |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: American Chemical Society Country of Publication: United States NLM ID: 101313589 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1936-086X (Electronic) Linking ISSN: 19360851 NLM ISO Abbreviation: ACS Nano Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: |
Original Publication: Washington D.C. : American Chemical Society |
| مستخلص: |
Low-dimensional metal nanostructures have attracted considerable research attention, owing to their potential as catalysts. A controlled reductive phase transition of monolayer RuO 2 nanosheets could provide an effective way to produce holey large-area 2D Ru nanosheets with tailored defect structures and metal coordination number. The locally optimized holey Ru metal nanosheet, with a metal coordination number of ∼10.2, exhibited excellent electrocatalytic activity for the hydrogen evolution reaction (HER) with a reduced overpotential of 38 mV in a 1 M KOH electrolyte. The creation of a highly anisotropic holey nanosheet morphology with optimization of local structure was quite effective in developing efficient catalyst materials. The universal importance of controlling the coordination number was confirmed through a comparative study of Ru nanoparticles, which showed optimized HER activity with an identical metal coordination number. The coordination number plays a pivotal role in governing electrocatalytic activity, which could be ascribed to the formation of the most active structure for HER at most 2 defects near active sites (2,2'), resulting in the stabilization of a dihydrogen Ru-(H 2 ) intermediate and the increased contribution of Volmer-Tafel mechanism. |
| فهرسة مساهمة: |
Keywords: Ru nanosheet; coordination number; electrocatalyst; holey structure; hydrogen evolution |
| تواريخ الأحداث: |
Date Created: 20240530 Latest Revision: 20240611 |
| رمز التحديث: |
20240611 |
| DOI: |
10.1021/acsnano.4c03316 |
| PMID: |
38815184 |
| قاعدة البيانات: |
MEDLINE |
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