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Study Results from Xiamen University Update Understanding of Chalcogens (Enhanced electrocatalytic activity on gold nanocrystals enclosed by...

August 26, 2014



Study Results from Xiamen University Update Understanding of Chalcogens (Enhanced electrocatalytic activity on gold nanocrystals enclosed by high-index facets for oxygen reduction)

By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Chalcogens are presented in a new report. According to news reporting out of Xiamen, People's Republic of China, by NewsRx editors, research stated, "The physical nature (e.g. crystal size or surface atomic arrangement) of an electrocatalyst is central to the performance of electrochemical devices such as fuel cells and lithium-air batteries. This is particularly true in electrodes for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), which involve multiple elementary steps and a substantial energy barrier."

Our news journalists obtained a quote from the research from Xiamen University, "As a result, OER and ORR generally are rate-limiting step in electrode reactions. Here, we show Au nanocrystals enclosed by high-index facets (e.g. (310)) are more energetically and kinetically favorable than (111) facets for oxygen reduction in both lithium-air battery and fuel cell conditions. In both systems, the electric potential for oxygen reduction was reduced by 60-160 mV and the current increases by more than five times if high-index Au nanocrystals were utilized. These Au nanocrystals were synthesized at a temperature greater than the boiling point of ethylene glycol, the solvent used in this work."

According to the news editors, the research concluded: "This synthetic approach opens a new reproducible route to synthesize nanocrystals with high-index facets because it is facile, rapid, and results in a large-quantity of nanocrystals with control over the size and morphology."

For more information on this research see: Enhanced electrocatalytic activity on gold nanocrystals enclosed by high-index facets for oxygen reduction. Nano Energy, 2014;7():179-188. Nano Energy can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Nano Energy - www.elsevier.com/wps/product/cws_home/725743)

Our news journalists report that additional information may be obtained by contacting F.S. Ke, Xiamen University, Coll Chem & Chem Engn, Dept. of Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, People's Republic of China. Additional authors for this research include B. Solomon, Y. Ding, G.L. Xu, S.G. Sun, Z.L. Wang and X.D. Zhou (see also Chalcogens).

Keywords for this news article include: Asia, Xiamen, Chalcogens, Nanocrystal, Nanotechnology, Emerging Technologies, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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