Direct‐methanol fuel cells (DMFCs) have become a hot research topic in the energy field due to their excellent energy conversion efficiency and environmental sustainability. Optimization of catalyst preparation strategy is the key to enhance the performance of DMFC. In this study, melt quenching is employed to synthesize Al–Pd–Ag precursor alloy ribbons, and self‐supported nanoporous Pd–Ag catalysts with high activity are successfully prepared by a precisely controlled dealloying process. The catalysts are characterized microstructurally and tested electrochemically, and their performance is compared with samples without sodium terephthalate addition and with commercial Pt/C and Pd/C catalysts. In the results, it is shown that the maximum peak current density of methanol electrocatalytic oxidation is significantly enhanced to 1451.16 mA mg−1 with the addition of 15 mM sodium terephthalate, which is about 6.6 times higher than that of the unadded samples, and the catalytic performance is improved by a factor of 7.7 and 12.0, respectively, compared to those of commercial Pt/C and Pd/C. This remarkable performance enhancement is attributed to the innovative dealloying method, which not only refines the catalyst structure but also achieves a significant increase in catalytic performance through the assistance of active self‐supporting nanoporous structures and interfacial synergistic effects between palladium and silver.

中文翻译：

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对苯二甲酸钠对活性自支撑纳米多孔 PdAg 催化剂电催化性能的影响


直接甲醇燃料电池 （DMFC） 因其优异的能源转换效率和环境可持续性而成为能源领域的热门研究课题。优化催化剂制备策略是提高 DMFC 性能的关键。在本研究中，采用熔融淬火合成了 Al-Pd-Ag 前驱体合金带，并通过精确控制的脱合金工艺成功制备了具有高活性的自支撑纳米多孔 Pd-Ag 催化剂。对催化剂进行微观结构表征和电化学测试，并将其性能与未添加对苯二甲酸钠的样品以及商业 Pt/C 和 Pd/C 催化剂进行比较。结果表明，添加 15 mM 对苯二甲酸钠后，甲醇电催化氧化的最大峰值电流密度显着提高至 1451.16 mA mg-1，比未添加的样品高约 6.6 倍，催化性能提高了 7.7 倍和 12.0 倍， 分别与商业 Pt/C 和 Pd/C 相比。这种显着的性能提升归功于创新的脱合金方法，该方法不仅优化了催化剂结构，而且通过活性自支撑纳米多孔结构以及钯和银之间的界面协同效应，显著提高了催化性能。