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New Hydrogen Findings from Ocean University of China Outlined (Electrocatalytic Hydrogen Evolution and Oxygen Reduction on Polyoxotungstates/Graphene...

August 19, 2014



New Hydrogen Findings from Ocean University of China Outlined (Electrocatalytic Hydrogen Evolution and Oxygen Reduction on Polyoxotungstates/Graphene Nanocomposite Multilayers)

By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators discuss new findings in Hydrogen. According to news reporting out of Qingdao, People's Republic of China, by NewsRx editors, research stated, "Negatively charged Pressler-type heteropolytungstate K12.5Na1.5[NaP5W30O110] (P5W30) clusters and graphene oxide (GO) were constructed into polyoxotungstates/graphene (POTs/G) nanocomposite multilayer with protonated poly(ethylenimine) (PEI) via layer-by-layer self-assembly. The growth process of (PEI/P5W30-GO)(n) multilayer films was monitored by UV-visible spectroscopy and cyclic voltammetry."

Our news journalists obtained a quote from the research from the Ocean University of China, "The atomic force microscopy images clearly showed the morphology of single-sheet GO in multilayer films. The UV-light irradiation of multilayers afforded reduced graphene oxide (RGO) in the multilayers. The changes in composition of C is in GO, W 4f in P5W30, and N 1s in PEI were detected by X-ray photoelectron spectroscopy. A possible photoreduction mechanism of GO was proposed. The electrochemical behavior of (PEI/P5W30-RGO)(n) multilayers modified on a glassy carbon electrode at room temperature and their electrocatalytic activity toward oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) were investigated. At a potential of -0.6 V, the multilayers clearly exhibited electrocatalytic activity for ORR via almost a four-electron reduction pathway to H2O. A remarkable electrocatalytic HER could be detected on the (PEI/P5W30-RGO)(n) multilayer, whereas the (PEI/P5W30-GO)(n) multilayer did not show any HER signal in the same potential range."

According to the news editors, the research concluded: "This study investigated and extended the application of POTs/G nanocomposites to the electrocatalysis of ORR and HER."

For more information on this research see: Electrocatalytic Hydrogen Evolution and Oxygen Reduction on Polyoxotungstates/Graphene Nanocomposite Multilayers. Journal of Physical Chemistry C, 2014;118(26):14371-14378. Journal of Physical Chemistry C can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Journal of Physical Chemistry C - www.pubs.acs.org/journal/jpccck)

Our news journalists report that additional information may be obtained by contacting M. Jiang, Ocean University of China, Coll Chem & Chem Engn, Qingdao 266100, People's Republic of China. Additional authors for this research include D.D. Zhu, J.J. Cai, H.Y. Zhang and X.B. Zhao (see also Hydrogen).

Keywords for this news article include: Asia, Gases, Qingdao, Elements, Hydrogen, Chalcogens, Inorganic Chemicals, 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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