The ORR kinetic optimization for PtNi and PtPb catalysts is conferred by stress induction. The first principle calculation shows the cleavage barrier reduction of key intermediate *OOH to 28.48 and 0 kJ mol-1, respectively. Proper kinetic tuning led to a mass activity promotion of PtNi to 3.57 times of Pt/C, whereas excessive modulation induced the activity degradation for PtPb and shifted rate-determined step to the first electron transfer, which was verified by in-situ infrared spectroscopy and electrochemical characterization.

中文翻译：

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应力诱导下铂基催化剂的氧还原反应动力学


PtNi 和 PtPb 催化剂的 ORR 动力学优化是通过应力诱导实现的。第一个原理计算显示关键中间体 *OOH 的切割屏障分别降低到 28.48 和 0 kJ mol-1。适当的动力学调整导致 PtNi 的质量活性提高到 Pt/C 的 3.57 倍，而过度调制诱导 PtPb 的活性降解，并将速率决定的步骤转移到第一个电子转移，这通过原位红外光谱和电化学表征得到了验证。