Add time:09/28/2019         Source:infona.pl

A nitrogen-riched monomer (10,12-bis(4-hexylthiophen-2-yl)thieno[3′,4′:5,6]pyrazino[2,3-f][1,10]phenanthroline) (HTPP) was synthesized and polymerized to give a polymer (PHTPP) on the electrode directly by the electrodeposition method. The polymer-Cu complex (PHTPP-Cu) was obtained by immersing the polymer modified electrode in copper sulfate solution. The PHTPP-Cu catalyst provides two types of active sites including pyridinic-N atoms and Cu-Nx-C units, and also has a high specific surface area and better conductive property. These excellent features facilitate the reduction of oxygen to water by the catalyst through a four-electron mechanism in the phosphate buffer solution (PBS). Be employed as the cathodic catalyst, PHTPP-Cu also exhibits excellent performance in microbial fuel cell (MFC), which was comparable to the commercial Pt/C catalyst. Such a polymer based catalyst providing a good opportunity for the preparation of low-cost non-noble metal ORR catalyst for fuel cell utilization.

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