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The enhancement of oxygen reduction reaction (ORR) catalytic activity of non-precious metal catalysts is extremely desirable but still full of challenges. Here, a novel hybrid, core-shell Co/CoNx@C nanoparticles enfolded by Co-N doped carbon nanosheets was successfully prepared by a facile two-step method, including the formation of well-curved porous carbon nanosheets by a facile sintering of trisodium...
Single-walled carbon nanotubes (SWCNTs) were synthesized in reduced pressure air using pulsed arc discharge after preheating the catalyst. Our experimental results revealed that preheating the catalysts can assist the synthesis of SWCNTs in air under a pressure of 5–10kPa. The SWCNTs have a diameter of 1.5–2nm and length can reach several micrometers. The consumption rate of the anode and the production...
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