Metal phosphides are of great recent interest as promoters to precious metal-driven catalytic oxidation of alcohols in direct alcohol fuel cells. In this work, a novel approach for facile and environmentally friendly synthesis of molybdenum phosphide (MoP) nanocrystals anchored on graphitized carbon is developed by one-step pyrolysis of a phosphorus-containing resin exchanged with Mo⁵⁺. A significant promotion effect of MoP on Pt in methanol electrooxidation is observed. The Pt–MoP/C catalyst exhibits ultrahigh electroactivity, and compared to commercial Pt/C, this catalyst reaches a −140 mV more negative onset potential and has 10 times the mass activity at 0.4 V vs. SCE and 5.1 times the peak mass activity. In addition, Pt–MoP/C has also excellent stability and CO tolerance, including a peak mass activity retention of 81.4% after 1000 cycles as compared to that of 51.6% on commercial Pt/C and a 140 mV more negative CO_ad oxidation potential. The noteworthy promotion effect of MoP on Pt in methanol electrooxidation is also evaluated by theoretical calculations.

中文翻译：

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轻松合成用于高性能甲醇氧化的磷化钼（MoP）纳米复合Pt载体

金属磷化物作为直接醇燃料电池中的贵金属驱动的醇催化氧化的促进剂，最近引起人们极大的兴趣。在这项工作中，通过一步热解与Mo ⁵⁺交换的含磷树脂，开发了一种新的方法，可以轻松，环保地合成锚固在石墨化碳上的磷化钼（MoP）纳米晶体。观察到MoP对Pt在甲醇电氧化中的显着促进作用。Pt–MoP / C催化剂具有超高的电活性，与市售Pt / C相比，该催化剂的负起始电位更高-140 mV，在0.4 V时的质量活性为10倍。SCE和峰质量活性的5.1倍。此外，Pt–MoP / C还具有出色的稳定性和对CO的耐受性，包括1000次循环后的峰质量活性保留率为81.4％，而商用Pt / C的峰质量保留率为51.6％，负的CO _ad氧化电位为140 mV 。还通过理论计算评估了MoP对Pt在甲醇电氧化中的显着促进作用。