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Metallic Mo, Ru coupled with graphitic carbon dots to activate inertness 1D copper-based nanowires as efficient electrocatalyst for pH-universal hydrogen evolution reaction.

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Title: Metallic Mo, Ru coupled with graphitic carbon dots to activate inertness 1D copper-based nanowires as efficient electrocatalyst for pH-universal hydrogen evolution reaction.
Authors: Du, Yingxue1 (AUTHOR), Li, Qichang1 (AUTHOR), Han, Linping1 (AUTHOR), Yang, Pengfei2 (AUTHOR), Xin, Liantao1 (AUTHOR), Jin, Wei3 (AUTHOR), Xiao, Weiping4 (AUTHOR), Li, Zhenjiang5 (AUTHOR), Wang, Jinsong6 (AUTHOR), Wu, Zexing1 (AUTHOR) splswzx@qust.edu.cn, Wang, Lei1 (AUTHOR) inorchemwl@126.com
Source: Applied Catalysis B: Environment & Energy. May2024, Vol. 344, pN.PAG-N.PAG. 1p.
Subjects: Hydrogen evolution reactions, Activated carbon, Nanowires, Copper catalysts, Ruthenium catalysts, Hydrogen as fuel, Electron transport, Biological transport
Abstract: Designing efficient and robust pH-universal electrocatalysts for hydrogen evolution reaction (HER) is the key to boost the development of eco-friendly hydrogen energy. Herein, metallic Mo, Ru coupled with graphitic carbon dots (GQDs) activate inertness 1D copper-based nanowires (GQDs@ Ru, Mo-Cu 2 O/CF) by surface chemical oxidation, solvothermal and low temperature calcination. The metals of Mo, Ru favor the water-dissociation and optimize the hydrogen adsorption/desorption. In addition, GQDs owns edge effect and good conductivity, and then benefiting electron transport and active sites exposure. Therefore, the synthesized GQDs@ Ru, Mo-Cu 2 O/CF requires only 30, 39, 17 and 55 mV in alkaline, acidic, alkaline seawater and neutral to achieve 10 mA cm−2. Moreover, the assembled electrolyzer requires 1.58 V to reach 10 mA cm−2 in alkaline seawater, and maintained well at 200 mA cm−2 for 100 h. This research opens a new avenue for designing efficient catalysts on energy-relation applications through introducing both metal and non-metal. [Display omitted] • Introducing Mo, Ru and GQDs to activate inert Cu-based nanowires to achieve efficient HER. • 1D nanowires is modified by metal particles and GQDs through a simple and valid approach. • The assembled electrolyzer has excellent stability at 200 mA cm−2 for 100 h in alkaline seawater. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Designing efficient and robust pH-universal electrocatalysts for hydrogen evolution reaction (HER) is the key to boost the development of eco-friendly hydrogen energy. Herein, metallic Mo, Ru coupled with graphitic carbon dots (GQDs) activate inertness 1D copper-based nanowires (GQDs@ Ru, Mo-Cu 2 O/CF) by surface chemical oxidation, solvothermal and low temperature calcination. The metals of Mo, Ru favor the water-dissociation and optimize the hydrogen adsorption/desorption. In addition, GQDs owns edge effect and good conductivity, and then benefiting electron transport and active sites exposure. Therefore, the synthesized GQDs@ Ru, Mo-Cu 2 O/CF requires only 30, 39, 17 and 55 mV in alkaline, acidic, alkaline seawater and neutral to achieve 10 mA cm−2. Moreover, the assembled electrolyzer requires 1.58 V to reach 10 mA cm−2 in alkaline seawater, and maintained well at 200 mA cm−2 for 100 h. This research opens a new avenue for designing efficient catalysts on energy-relation applications through introducing both metal and non-metal. [Display omitted] • Introducing Mo, Ru and GQDs to activate inert Cu-based nanowires to achieve efficient HER. • 1D nanowires is modified by metal particles and GQDs through a simple and valid approach. • The assembled electrolyzer has excellent stability at 200 mA cm−2 for 100 h in alkaline seawater. [ABSTRACT FROM AUTHOR]
ISSN:09263373
DOI:10.1016/j.apcatb.2023.123617