Ni2P Makes Application of the PtRu Catalyst Much Stronger in Direct Methanol Fuel Cells.
Ni2P Makes Application of the PtRu Catalyst Much Stronger in Direct Methanol Fuel Cells.
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DOI：
10.1002/cssc.201500357
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发表时间：
2015-10
期刊：
影响因子：
8.4
通讯作者：
Jinfa Chang;Ligang Feng;Changpeng Liu;W. Xing
中科院分区：
文献类型：
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作者：
Jinfa Chang;Ligang Feng;Changpeng Liu;W. Xing
铂钌（PtRu）被认为是直接甲醇燃料电池的最佳催化剂，但钌（Ru）流失导致的性能下降严重阻碍了其商业应用。在此，我们证明了磷化镍（Ni₂P）的存在大大减少了钌的流失，从而使铂钌在直接甲醇燃料电池中的应用更具优势。通过循环伏安法观察到了出色的催化活性和稳定性。将催化剂材料集成到实际的直接甲醇燃料电池中时，在不同温度下，PtRu - Ni₂P/C催化剂在参考催化剂中实现了最高的最大功率密度。在30°C时，PtRu - Ni₂P/C获得了69.9 mW/cm²的最大功率密度，这甚至高于最先进的商业PtRu催化剂在70°C时的功率密度（63.1 mW/cm²）。此外，由于磷化镍的存在，钌流失导致的性能下降大幅减少，这表明其具有非常有前景的应用。
PtRu is regarded as the best catalyst for direct methanol fuel cells, but the performance decay resulting from the loss of Ru seriously hinders commercial applications. Herein, we demonstrated that the presence of Ni2 P largely reduces Ru loss, which thus makes the application of PtRu much stronger in direct methanol fuel cells. Outstanding catalytic activity and stability were observed by cyclic voltammetry. Upon integrating the catalyst material into a practical direct methanol fuel cell, the highest maximum power density was achieved on the PtRu-Ni2P/C catalyst among the reference catalysts at different temperatures. A maximum power density of 69.9 mW cm(-2) at 30 °C was obtained on PtRu-Ni2P/C, which is even higher than the power density of the state-of-the-art commercial PtRu catalyst at 70 °C (63.1 mW cm(-2)). Moreover, decay in the performance resulting from Ru loss was greatly reduced owing to the presence of Ni2 P, which is indicative of very promising applications.