Tunable long-chains of core@shell PdAg@Pd as high-performance catalysts for ethanol oxidation

Huaming You ^a , Fei Gao ^a , Tongxin Song ^a , Yangping Zhang ^a , Huiwen Wang ^b, *（王慧文） , Xiaofang Liu ^a , Mengyu Yuan ^a , Yuan Wang ^a , Yukou Du ^a, *（杜玉扣）

^a College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, PR China

^b College of Chemical and Environmental Engineering, Yancheng Teachers University, Yancheng 224002, China

Journal of Colloid and Interface Science 574 (2020) 182--189

High performance nanomaterial catalysts have attracted great attention on the application for the direct alcohol fuel cell. To improve the catalytic behavior, it is a challenge to modulate the surface structure and morphology of catalysts. We integrated properties of advanced networks nanostructure and core@shell structure to form a series of PdAg@Pd worm-like networks catalysts. Importantly, the composition-optimized Pd₇₆Ag₂₄ WNWs exhibited excellent catalytic performance towards ethanol oxidation reaction compared to that of commercial Pd/C catalysts in alkaline media. The mass activity of Pd₇₆Ag₂₄ WNWs is 3.55 times higher than that of commercial Pd/C catalysts for EOR. Moreover, the Pd₇₆Ag₂₄ WNWs also showed superior stability after 250 successive cycles and kept far higher residual activities than that of the other catalysts. The synthesis of PdAg@Pd worm-like networks catalysts provides a reference to well combine the advantages of core@shell and networks structure to form high performance catalysts application for DEFC.

链接：https://www.sciencedirect.com/science/article/pii/S0021979720304999