The commercialization of direct alcohol fuel cells (DAFCs) relies on the development of high performance electrocatalysts for both the alcohol oxidation reaction and the oxygen reduction reaction (ORR). In this study, a novel phosphorus-doped palladium-molybdenum (P-PdMo) bimetallene with a partially amorphous structure is demonstrated. The ultrathin and curved morphology of the nanosheets, combined with electronic regulation by phosphorus atoms, facilitates OH adsorption and CO desorption. Consequently, the catalyst exhibits significantly enhanced activity and durability in the electrooxidation of alcohols, including methanol, ethanol, ethylene glycol, and glycerol. Particularly toward ethanol oxidation, the P-PdMo bimetallene displays exceptional mass and specific activities up to 4.95 A mg-1Pd and 8.28 mA cm−2, respectively. Furthermore, the P-PdMo bimetallene demonstrates outstanding ORR performance, with an onset potential of 1.0 V and a half-wave potential of 0.88 V. Overall, this study opens new avenues in metallene electrocatalysts and advancing toward the practical implementation of DAFCs.

中文翻译：

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磷掺杂 PdMo 双金属烯作为优异的双功能燃料电池电催化剂


直接醇燃料电池（DAFC）的商业化依赖于醇氧化反应和氧还原反应（ORR）的高性能电催化剂的开发。在这项研究中，展示了一种具有部分非晶结构的新型磷掺杂钯钼（P-PdMo）双金属烯。纳米片的超薄和弯曲形态，与磷原子的电子调节相结合，有利于 OH 吸附和 CO 解吸。因此，该催化剂在醇类（包括甲醇、乙醇、乙二醇和甘油）的电氧化中表现出显着增强的活性和耐久性。特别是对于乙醇氧化，P-PdMo 双金属烯表现出优异的质量和比活性，分别高达 4.95 A mg-1Pd 和 8.28 mA cm−2。此外，P-PdMo双金属烯表现出出色的ORR性能，起始电位为1.0 V，半波电位为0.88 V。总体而言，这项研究为金属烯电催化剂开辟了新途径，并推动DAFC的实际应用。