Three-dimensional palladium-rhodium nanosheet assemblies: Highly efficient catalysts for methanol electrooxidation

Hongyuan Shang, Hui Xu, Liujun Jin, Chunyan Chen, Cheng Wang, Tongxin Song, Yukou Du ^*（杜玉扣）

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China

Journal of Colloid and Interface Science 556 (2019) 360--365

Even though substantial attention has been focused on exploring promising palladium-based catalysts, the creation of electrocatalysts with simultaneous high activity and reduced cost for fuel cell reactions remains a challenge. Here, we report on the design and construction of a new class of three-dimensional (3D) palladium-rhodium (PdRh) nanosheet assembly (NSA) catalysts through a seed-mediated growth method. Interestingly, the well-defined NSAs with optimized electronic structures and highly open 3D structures exhibit greatly enhanced electrocatalytic activity toward the methanol oxidation reaction (MOR). In particular, optimized Pd₈₆Rh₁₄ NSAs have a mass activity of 1672.7 mA mg⁻¹ for the MOR, 5.4 times higher than that of commercial Pd/C catalysts (303.8 mA mg⁻¹). More importantly, these PdRh NSAs also display improved MOR stability, with stable high electrocatalytic performance for more than 250 potential cycles.

链接：https://www.sciencedirect.com/science/article/pii/S0021979719309865?via%3Dihub