Facile solvothermal synthesis of Pt₇₆Co₂₄ nanomyriapods for efficient electrocatalysis

Abstract

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.

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

“…The four characteristic diffraction peaks show up at 40.8°, 47.4°, 69.4° and 82.9°, which correspond to the (111), (200), (220) and (311) crystal facets of the fcc PtCo alloy, respectively . Moreover, these diffraction peaks coincidently emerge between those of standard Co (JCPDS‐05‐0727) and Pt (JCPDS‐04‐0802), forcefully confirming the formation of the PtCo alloy …”

General Strategy for Synthesis of Pd3M (M = Co and Ni) Nanoassemblies as High‐Performance Catalysts for Electrochemical Oxygen Reduction

“…However, the large overpotential and sluggish ORR kinetics due to the multielectron transfer process requires an effective catalyst to facilitate the ORR. Platinum (Pt)‐based materials have been regarded as the most effective ORR catalysts, whereas extreme scarcity and high‐cost largely limit their practical applications . Substantial research efforts have been dedicated to substitute Pt by various strategies without compromising the electrocatalytic performance .…”

“…Arginine was chosen as a good structure‐directing agent because of its attractive guanidine group ( Scheme a), which has unique self‐assembly properties and coordination capacities (Scheme b), making it easy to build the highly alloying nanoassemblies via modulating both the nucleation and crystal‐growth kinetics. Despite biomolecules are commonly employed in building of Pt‐based nanocrystals with novel architectures, very few reports have looked into the Pd‐based nanocrystals with unique assemblies‐like structure. Furthermore, both Pd 3 Co and Pd 3 Ni nanoassemblies manifest the remarkably enhanced electrocatalytic properties in terms of activity and stability for the ORR relative to those of Pd nanoassemblies and Pd black catalysts.…”

“…The RRDE results indicate that the resulting Pd 3 Co and Pd 3 Ni nanoassemblies possess outstanding electrocatalytic activity and stability for the ORR, which can be mainly attributed to the unique structural and compositional superiorities. Specifically, the unique 3D porous architecture can serve as “nano reaction pools,” which not only enlarge the active surface area but also promote the mass diffusion and electron transport; The abundant surface defects, including vacancy, dislocation, and low‐coordinate atomic steps, afford a high density of ORR active sites on catalyst surface; 3D porous nanoassemblies possess a higher resistance to dissolution, migration, aggregation, and Ostwald ripening compared to that of 0D particles, resulting in superior stability. Most importantly, due to the smaller lattice parameters of Co and Ni than those of Pd, the alloying Pd with Co or Ni would result in the lattice contraction of Pd and the downshift of d‐bands, which have been confirmed by XRD patterns and XPS spectra (Figure c and Figure ).…”

Well‐Arranged and Confined Incorporation of PdCo Nanoparticles within a Hollow and Porous Metal–Organic Framework for Superior Catalytic Activity

“…Theb inding energy of Co 0 (Co 2p 3/2 :7 77.8 eV) was shifted to al ower energy compared to that reported in the literature (Co 2p 3/2 :778.3 eV), [12] which indicates the alloying of Co with Pd. [13] From the XPS data, the Pd 0 :Co 0 atomic ratio was found to be 7:3. We found that ca.…”