By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Heavy Metals are presented in a new report. According to news reporting originating in Changchun, People's Republic of China, by NewsRx journalists, research stated, "A novel micro/nano-composite, based on cobalt(II) tetranitrophthalocyanine (CoTNPc) grown on poly(sodium-p-styrenesulfonate) modified graphene (PGr), as a non-noble-metal catalyst for the oxygen reduction reaction (ORR), is fabricated by an in situ solvothermal synthesis method. The CoTNPc/PGr is characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible (UV-vis) absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS), respectively."
The news reporters obtained a quote from the research from the Changchun University of Science and Technology, "The electrocatalytic activity of the CoTNPc/PGr composite toward the ORR is evaluated using cyclic voltammetry and linear sweep voltammetry methods. The CoTNPc/PGr composite exhibits an unexpected, surprisingly high ORR activity compared to CoTNPc or PGr. The onset potential for ORR on CoTNPc/PGr is found to be around -0.10 V vs. SCE in 0.1 M NaOH solution, which is 30 mV and 70 mV more positive than that on PGr and CoTNPc, respectively. The peak current density on CoTNPc/PGr is about 2 times than that on PGr and CoTNPc, respectively. Rotating disk electrode (RDE) measurements reveal that the ORR mechanism is nearly via a four-electron pathway on CoTNPc/PGr. The current density for ORR on CoTNPc/PGr still remains 69.9% of its initial value after chronoamperometric measurements for 24 h. Pt/C catalyst, on the other hand, only retains 13.3% of its initial current. The peak potential shifts slightly and current barely changes when 3 M methanol is added."
According to the news reporters, the research concluded: "The fabricated composite catalyst for ORR displays high activity, good stability and excellent tolerance to the crossover effect, which may be used as a promising Pt-free catalyst in alkaline direct methanol fuel cells (DMFCs)."
For more information on this research see: A novel cobalt tetranitrophthalocyanine/graphene composite assembled by an in situ solvothermal synthesis method as a highly efficient electrocatalyst for the oxygen reduction reaction in alkaline medium. Physical Chemistry Chemical Physics, 2013;15(31):13093-100. (Royal Society of Chemistry - www.rsc.org/; Physical Chemistry Chemical Physics - pubs.rsc.org/en/journals/journalissues/cp)
Our news correspondents report that additional information may be obtained by contacting G. Lv, Dept. of Chemistry and Chemical Engineering, Changchun University of Science and Technology, Changchun 130022, People's Taiwan. Additional authors for this research include L. Cui, Y. Wu, Y. Liu, T. Pu and X. He (see also Heavy Metals).
Keywords for this news article include: Asia, Cobalt, Changchun, Chalcogens, Heavy Metals, Transition Elements, People's Republic of China.
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