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Jin C.,Soochow University of China | Jin C.,University of South Carolina | Jin C.,Key Laboratory for Fuel Cell Technology of Guangdong Province | Yang Z.,University of South Carolina | And 3 more authors.
Electrochemistry Communications | Year: 2012

La0.6Sr1.4MnO4 (LSMO4) layered perovskite with K2NiF4 structure was prepared and evaluated as anode material for La0.8Sr0.2Ga 0.83Mg0.17O3 - δ (LSGM) electrolyte supported intermediate temperature solid oxide fuel cells (IT-SOFCs). X-ray diffraction results show that LSMO4 is redox stability. Thermal expansion coefficient of LSMO4 is close to that of LSGM electrolyte. By adopting LSMO4 as anode and La0.6Sr 0.4Co0.8Fe0.2O3 (LSCF) as cathode, maxium power densities of 146.6, 110.9 mW cm- 2 with H2 fuel at 850, 800 °C and 47.3 mW cm- 2 with CH4 fuel at 800 °C were obtained, respectively. Further, the cell demonstrated a reasonably stable performance under 180 mA cm- 2 for over 40 h with H2 fuel at 800 °C. © 2011 Elsevier B.V. All rights reserved. Source


Tan Y.,Key Laboratory for Fuel Cell Technology of Guangdong Province | Tan Y.,South China University of Technology | Fu Z.,Key Laboratory for Fuel Cell Technology of Guangdong Province | Fu Z.,South China University of Technology | And 9 more authors.
Journal of Materials Chemistry | Year: 2012

Suitable combination of organic fragments N-(3-carboxyphenyl)-4,4′- bipyridinium and m-benzene dicarboxylate affords a new type photochromic metal-viologen coordination polymer with close packed arrangements. The aggregates build an interesting stable crystalline framework showing long lived color constancy. Repeating cycles of reversible color changes are observed for the molecular switch in air upon photoirradiation. © 2012 The Royal Society of Chemistry. Source


Yang X.,South China University of Technology | Yang X.,Key Laboratory for Fuel Cell Technology of Guangdong Province | Yang X.,CAS Guangzhou Institute of Energy Conversation | Huang C.,South China University of Technology | And 11 more authors.
Applied Catalysis B: Environmental | Year: 2013

A bimetallic Pd-promoted gold catalyst with mesoporous silica nanoparticles (MSNs) as support, PdAu/MSN, was prepared by an impregnation-hydrogen reduction method, and its catalysis for the base-free oxidation of benzyl alcohol was investigated. It was found that adding a small amount of Pd, with a Pd/Au atomic ratio as low as 0.05/1, can significantly decrease the size of the gold particles and thereby remarkably enhance the catalyst's activity for aerobatic oxidation. At the optimal Pd/Au atomic ratio of 0.2/1, the catalyst Pd0.2Au/MSN showed 8 times and 3 times higher activity than the monometallic catalysts Au/MSN and Pd/MSN, respectively. The prepared catalysts were comprehensively characterized by XRD, DRUV-vis, TEM, XPS, and H2-TPR to correlate the enhanced activity with the promotional effect induced by adding Pd. © 2013 Elsevier B.V. Source


Yang X.,South China University of Technology | Yang X.,Key Laboratory for Fuel Cell Technology of Guangdong Province | Chen D.,South China University of Technology | Chen D.,Key Laboratory for Fuel Cell Technology of Guangdong Province | And 9 more authors.
Journal of Catalysis | Year: 2012

A high-performance bimetallic catalyst with mesoporous silica nanoparticles as support, PdAu/MSN, was prepared by an organic impregnation-hydrogen reduction approach. A series of investigations were conducted to assess the effects of (i) the porous nanoparticle support on the dispersion of active components and on the catalyst's performance, (ii) the addition of gold on the dispersion of active components and the catalyst's activity, and (iii) the preparation parameters, such as solvent, pressure, and temperature, on the catalyst's activity. The active metallic components were highly dispersed, with particle size 2.5 nm. The addition of gold to the catalyst favorably promoted the hydrogenation of cinnamaldehyde. The activity of PdAu 0.2/MSN (with Au/Pd molar ratio 0.2:1) was up to four times higher than that of Pd/MSN (without Au as a promoter) and eight times higher than that of commercial Pd/C catalyst. The enhanced activity of PdAu 0.2/MSN can be attributed to the synergistic effect of Pd with the added Au and the highly dispersed active components. The ultrahigh activity, as well as its novel structure with controllable compositions, makes this catalyst very attractive for both fundamental research and practical applications. © 2011 Elsevier Ltd. All rights reserved. Source


Hong P.,South China University of Technology | Hong P.,Key Laboratory for Fuel Cell Technology of Guangdong Province | Hong P.,Key Laboratory of Enhanced Heat Transfer and Energy Conservation | Luo F.,South China University of Technology | And 8 more authors.
International Journal of Hydrogen Energy | Year: 2011

Pt/C, Pd/C and PdPt/C catalysts are potential anodic candidates for electro-oxidation of formic acid. In this work we designed a miniature air breathing direct formic acid fuel cell, in which gold plated printed circuit boards are used as end plates and current collectors, and evaluated the effects of anode catalysts on open circuit voltage, power density and long-term discharging stability of the cell. It was found that the cell performance was strongly anode catalyst dependent. Pd/C demonstrated good catalytic activity but poor stability. A maximum power density of 25.1 mW cm-2 was achieved when 5.0 M HCOOH was fed as electrolyte. Pt/C and PdPt/C showed poor activity but good stability, and the cell can discharge for about 10 h at 0.45 V (Pt/C anode) and 15 h at 0.3 V (PdPt/C) at 20 mA. © 2011 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. Source

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