Partially oxidized TaC0.58normalN0.42 has been investigated as a cathode for polymer electrolyte fuel cells (PEFCs). Catalytic activity for the oxygen reduction reaction (ORR) significantly depends on the oxidation state of TaC0.58normalN0.42 . TaC0.58normalN0.42 and Ta2normalO5 had a poor catalytic activity for the ORR. The onset potential on the partially oxidized TaC0.58normalN0.42 for the ORR had a maximum value of 0.83 V vs a reversible hydrogen electrode in 0.1moldm−3 normalH2SO4 at 30°C . X-ray diffraction analysis showed that the specimens, which had a definite catalytic activity for the ORR, had both TaCxnormalNy and Ta2normalO5 peaks. This result indicated that an appropriate oxidation of the TaC0.58normalN0.42 was essential to enhance the catalytic activity for the ORR.

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GNRI significantly associated with cardiac events after elective PCI. Further studies should be performed to establish appropriate therapeutic strategies for this vulnerable patient group.

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