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Your search keyword '"Su, Wei-Nien"' showing total 6 results
Start Over Author "Su, Wei-Nien" Journal nano energy
6 results on '"Su, Wei-Nien"'

5. Robust and conductive Magnéli Phase Ti4O7decorated on 3D-nanoflower NiRu-LDH as high-performance oxygen reduction electrocatalyst

Author

Ibrahim, Kassa Belay, Su, Wei-Nien, Tsai, Meng-Che, Chala, Soressa Abera, Kahsay, Amaha Woldu, Yeh, Min-Hsin, Chen, Hung-Ming, Duma, Alemayehu Dubale, Dai, Hongjie, and Hwang, Bing-Joe

Abstract

Escalating both electrochemically active and stable materials at a time is an important challenge in the field of catalysis till to date. Carbon as a pillar material has been used for long time due to its intrinsic properties like high conductivity and large surface area that can increase activity of electrocatalyst. However, severe drop in activity due to carbon corrosion is the main challenge. Here, we introduce robust, conductive and stable Magnéli phase Ti4O7nano-pillar in to flower like nickel ruthenium-layered double hydroxide (3D-FL-NiRu-LDH/ Ti4O7) through an easy in situ growth approach for the first time. The decoration of Magnéli phase Ti4O7not only significantly improves the activity but also stability of LDH nanosheet catalyst. The as-synthesized materials retain 98% of the activity after 45 h which surpasses all the reported LDH catalysts for oxygen reduction reaction under alkaline media. The key roles of Ti4O7are to provide the effective charge transfer networks of LDH catalyst and prevent agglomeration of LDH catalysts though strongly coupled interactions evidenced by X-ray photoelectron spectroscopy (XPS). Therefore, the developed catalyst demonstrates promising conductivity, together with durability. The reported approach of introducing a robust and conductive pillar coupled with LDH catalysts provides a novel pathway for developing a highly efficient and durable electrocatalyst.

Published
2018
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6. Advanced nanoelectrocatalyst for methanol oxidation and oxygen reduction reaction, fabricated as one-dimensional pt nanowires on nanostructured robust Ti0.7Ru0.3O2 support.

Author

Ho, Van Thi Thanh, Nguyen, Nam Giang, Pan, Chun-Jern, Cheng, Ju-Hsiang, Rick, John, Su, Wei-Nien, Lee, Jyh-Fu, Sheu, Hwo-Shuenn, and Hwang, Bing-Joe

Subjects
OXIDATION of methanol, OXYGEN reduction, CHEMICAL reactions, OXIDATION-reduction reaction, PLATINUM nanowires, NANOSTRUCTURED materials, FUEL cells
Abstract

Abstract: We present a simple and facile approach to tackling many current fuel cell issues by exploiting the direct growth of 1D Pt nanowires on nanostructured multifunctional Ti0.7Ru0.3O2 that exploit various advantages conferred by the multifunctional Ti0.7Ru0.3O2 support when synergistically combined with 1D Pt nanowires. The robust non-carbon Ti0.7Ru0.3O2 not only plays an important role as a co-catalyst but also shows extremely high stability in acidic and oxidative environments. Furthermore, the unique 1D anisotropic morphology of the Pt nanostructures can improve mass transport and the preferential exposure of certain crystal facets so promoting the catalytic activity of Pt NW/Ti0.7Ru0.3O2 for both ORR and the Methanol Oxidation Reaction (MOR). We also show that the oxygen reduction reaction current densities at the half-wave potential (∼0.9V), generated using co-catalytic Pt NW/Ti0.7Ru0.3O2 are, respectively, ∼2-fold higher than those of commercial Pt/C (JM) catalyst or Pt NW on carbon. Additionally, Pt NW/Ti0.7Ru0.3O2 exhibited excellent electrocatalytic activity and CO-tolerance toward MOR. For example, at 600mV the polarization current density of Pt NW/Ti0.7Ru0.3O2 was ∼5 times and 8 times greater than for the Pt NW/C and Pt/C (JM) catalysts. Thus, Pt NW/Ti0.7Ru0.3O2 is a novel functionalised co-catalytic support that shows utility as an advanced nanoelectrocatalyst for both of anode and cathode fuel cell applications. This powerful approach opens a reliable path to the discovery of advanced multifunctional nanoelectrocatalysts that can replace the traditional catalytic structures and motivate further research in the field. [Copyright &y& Elsevier]

Published
2012
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