Uniform Pt76Co24 myriapods with abundant active sites were prepared by a one-pot solvothermal method, which exhibited excellent catalytic performances for ORR and HER in acid media.
Three‐dimensional (3D) hollow nanoframes with high surface‐to‐volume ratio and abundant accessible active sites are a type of promising catalysts, albeit with the challenging synthesis by a one‐step solvothermal method. In this research, uniform bimetallic PtCu alloyed hollow cubic nanoframes (HCNFs) were synthesized with high yield by a simple, template‐free, one‐step co‐reduction approach, where cetyltrimethylammonium chloride (CTAC), Cl−/O2, ethanolamine, and oleylamine served as the structure director, oxidative etchant, reducing agent, and co‐reductant, respectively. The architectures were characterized by a series of characterization techniques. Combined with the 3D hollow structures, PtCu HCNFs exhibited enlarged specific/mass activities, boosted catalytic activity, and improved durability for the oxygen reduction reaction (ORR) and glycerol oxidation reaction (GOR) compared with Pt nanocubes (Pt NCs), commercial Pt/C (20 wt %), and Pt black catalysts in alkaline solutions. This work provides guidelines for the rational design and synthesis of frame‐like nanocatalysts with superior catalytic activity and stability.
In this work, hierarchical Pt4Co multi‐dendrites (MDs) with abundant active sites were synthesized by using a one‐pot solvothermal co‐reduction approach, where cetyltrimethylammonium chloride (CTAC), citric acid, and oleylamine served as the structure director, eco‐friendly reducing agent, and co‐reductant, respectively. The architectures were mainly characterized by using a series of characterization techniques, demonstrating the enlarged electrochemically active surface area of 28.27 m2 g−1, much enhanced mass activity and specific activity for oxygen reduction reaction (279.14 mA mg−1Pt and 0.89 mA cm−2) and glycerol oxidation reaction (1422.56 mA mg−1Pt, 4.58 mA cm−2) comparable with commercial Pt black, along with the superior durability. These results demonstrate the potential applications of the synthesized Pt4Co MDs catalyst in energy storage and transformation.
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