After 500 cycles, the electrocatalytic activity of Pt/CNT/C electrode still remains the 71% value of maximum, but the long-term stability needs to be improved more in the future.

• Pt/CNT/C电极经过500圈循环伏安扫描后，催化活性降为最初的71%25，其长期工作稳定性能有待提高。