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Fu X, Huang X, Cen Y, Ren X, Yan L, Jin S, Zhuang Z, Li W, Tian S. Ru Nanoparticles Encapsulated by Defective TiO 2 Boost the Hydrogen Oxidation/ Evolution Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2406387. [PMID: 39385625 DOI: 10.1002/smll.202406387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2024] [Revised: 09/21/2024] [Indexed: 10/12/2024]
Abstract
The development of efficient and durable electrocatalysts for the alkaline hydrogen oxidation/evolution reaction is crucial for anion exchange membrane fuel cells/water electrolyzers. However, designing such electrocatalysts poses a challenge due to the need for optimizing various adsorbates. Herein, highly dispersed Ru nanoparticles catalysts is reported encapsulated and supported by defective anatase phase of titanium dioxide (named as Ru NPs/def-TiO2(A)) for boosting hydrogen-cycle electrocatalysis with robust anti-CO-poisoning in alkaline conditions. The Ru NPs/def-TiO2(A) achieves a high-quality activity of 7.65 A mgRu -1, which is 23.2 and 9.5-fold higher than commercial Ru/C and Pt/C in alkaline HOR. Moreover, this catalyst exhibits an outstanding overpotential of 21 mV at 10 mA cm-2 in alkaline HER. Hydrogen underpotential deposition (Hupd) and CO stripping experiments demonstrate that Ru NPs/def-TiO2(A) has the optimized H*, OH*, and CO* adsorption strength, enabling the Ru NPs/def-TiO2(A) catalyst to display excellent and robust HOR/HER performance under alkaline conditions. Using density functional theory calculations, the enhanced HOR performance mechanism for the Ru NPs/def-TiO2(A) catalyst originates from the TiO2 step face in contact with the Ru nanoparticles, indicating that the kinetics of water formation are considerably more favorable at the Ru NPs/def-TiO2(A) interface.
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Affiliation(s)
- Xiuting Fu
- International Joint Bioenergy Laboratory of Ministry of Education, State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiaoxiao Huang
- International Joint Bioenergy Laboratory of Ministry of Education, State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yaping Cen
- International Joint Bioenergy Laboratory of Ministry of Education, State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiaoyang Ren
- International Joint Bioenergy Laboratory of Ministry of Education, State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Li Yan
- International Joint Bioenergy Laboratory of Ministry of Education, State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Shao Jin
- International Joint Bioenergy Laboratory of Ministry of Education, State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zhongbin Zhuang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Wanlu Li
- Aiiso Yufeng Li Family Department of Chemical and Nano Engineering, University of California San Diego, CA, 92093, USA
- Program in Materials Science and Engineering, University of California San Diego, CA, 92093, USA
| | - Shubo Tian
- International Joint Bioenergy Laboratory of Ministry of Education, State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, China
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Ganguly A, Hwa KY, Santhan A, Kanna Sharma TS. Strategic orchestration of MoSe 2 microspheres on β-cd functionalized rGO: A sustainable electrocatalyst for detection of rifampicin in real samples. CHEMOSPHERE 2022; 307:135373. [PMID: 35787878 DOI: 10.1016/j.chemosphere.2022.135373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/26/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
The ill effects of prolonged use of rifamycin antibiotics such as rifampicin accentuates its need for detection in the environment as well as in biological fluids. Antibiotics in water and soil are long-lasting, bio-accumulative, and hazardous to aquatic species as well as human health. To address this issue, a sensing platform has been developed using Molybdenum diselenide (MoSe2) embedded on reduced graphene oxide (rGO) functionalized with β-cyclodextrin (β-cd) polymer. The formation of hybrid composite was validated with X-ray diffraction analysis (XRD), Raman spectroscopy, fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and field emission scanning electron microscopy (FE-SEM) with EDX analysis. The formation of microspheres were observed with hexagonal crystal system and P63/mmc space group. Furthermore, the composite was employed to fabricate an efficient electrochemical sensor for detecting the widely used antibiotic, rifampicin (RIF). The results reveal excellent activity of the sensor with a limit of detection (LOD) of 28 nM in a linear working range from 0.019 to 374.5 μM. The sensor also exhibited a high sensitivity of 11.64 μA μM-1 cm-2. Additionally, the sensor showed appreciable recovery range when monitored in real-samples such as human serum and urine, and industrial water, and fish samples.
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Affiliation(s)
- Anindita Ganguly
- Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan; International Graduate Program in Energy and Optoelectronic Materials, National Taipei University of Technology, Taipei, Taiwan
| | - Kuo-Yuan Hwa
- Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan; Center for Biomedical Industry, National Taipei University of Technology, Taipei, Taiwan; International Graduate Program in Energy and Optoelectronic Materials, National Taipei University of Technology, Taipei, Taiwan.
| | - Aravindan Santhan
- Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan; International Graduate Program in Energy and Optoelectronic Materials, National Taipei University of Technology, Taipei, Taiwan
| | - Tata Sanjay Kanna Sharma
- Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan; Center for Biomedical Industry, National Taipei University of Technology, Taipei, Taiwan
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