Facile Solvothermal Synthesis of Pt₄Co Multi‐dendrites: An Effective Electrocatalyst for Oxygen Reduction and Glycerol Oxidation

Abstract

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.

Facile room-temperature fabrication of a silver–platinum nanocoral catalyst towards hydrogen evolution and methanol electro-oxidation

“…Although the Pt loading reduced significantly, the AgPt NCs/C catalysts still showed the mass activity of 175.25 mA mg Metal -1 and specific activity of 0.35 mA cm -2 , which was better than those of the C-supported Pt (NPs) catalyst (161.02 mA mg Metal -1 for mass activity and 0.23 mA cm -2 for a specific activity), as depicted in Please do not adjust margins Please do not adjust margins Figure 6b and Table S3. The high catalytic activity of the AgPt NCs/C catalyst could be interpreted due to (i) the unique coral-like dendritic nanostructure of AgPt NCs, which supply more active sites and smooth routes for rapid diffusion and transfer of the reactants and products, promoting the oxidation process of small organic molecules; 47,48 (ii) the incorporation of Ag into Pt catalyst, boosting the activation of the surface-active sites of the Pt. The LSV test was performed to further record the electrocatalytic activity of the as-obtained AgPt NCs/C catalyst.…”

“…6b and Table S3 (ESI †). The high catalytic activity of the AgPt NCs/C catalyst could be interpreted as due to (i) the unique coral-like dendritic nanostructure of the AgPt NCs, which supplies more active sites and smooth routes for rapid diffusion and transfer of the reactants and products, promoting the oxidation process of small organic molecules; 47,48 (ii) the incorporation of Ag into the Pt catalyst, which enhanced the activation of the surfaceactive sites of the Pt. 4,49 The LSV test was performed to further record the electrocatalytic activity of the as-obtained AgPt NCs/C catalyst.…”

Research and innovation in the electrocatalyst development toward glycerol oxidation reaction

“…99 Addition of Co able to promote C C bond cleavage and facilitate adsorbed intermediates removal from the alloy surface 100 while providing oxophilicity induction to improve material electrocatalytic properties and electronic structure alteration for better catalytic performance and durability. 101 Jiang et al 102 and Sun et al 103 investigated multiple Pt/Co combination ratios towards GOR. Jiang et al 102 reported that at optimum molar ratio value, higher Pt content, the onset potential was more negative with the most increased mass activity and specific activity than others.…”

“…101 Jiang et al 102 and Sun et al 103 investigated multiple Pt/Co combination ratios towards GOR. Jiang et al 102 reported that at optimum molar ratio value, higher Pt content, the onset potential was more negative with the most increased mass activity and specific activity than others. The dendritic structures provided high exposed active sites owing to the sufficient surface defects existence.…”

Solvothermal Synthesis of Monodisperse PtCu Dodecahedral Nanoframes with Enhanced Catalytic Activity and Durability for Hydrogen Evolution Reaction

“…Allantoin is a green nitrogen-rich heterocyclic compound derived from purine catabolism (Figure S1). 19 Its carbonyland amino-groups endow it possibility as the reductant and stabilizing agent, 20 as well as a good chelating agent with the metal precursors to decrease the reduction kinetics. 21 Herein, a facile solvothermal strategy was utilized to fabricate PtCu dodecahedral nanoframes (PtCu DNFs) in the presence of cetyltrimethylammonium chloride (CTAC), allantoin, and oleylamine (OAm).…”