Edge-segregated ternary Pd–Pt–Ni spiral nanosheets as high-performance bifunctional oxygen redox electrocatalysts for rechargeable zinc–air batteries

Abstract

Rational design of high-perfomance bifunctional electrocatalysts to simultaneously accelerate the sluggish reversible oxygen reduction and evolution reactions (ORR and OER) is an enormous challenge that restricts the working efficiency and...

Abundant Exterior/Interior Active Sites Enable Three-Dimensional PdPtBiTe Dumbbells C–C Cleavage Electrocatalysts for Actual Alcohol Fuel Cells

“…Additionally, lattice distortion is observed in PdPtBiTe DBs, which may induce local microstrain (Figure g). A large number of low coordinated atoms were observed at surface/interface (Figure h,i), which can enhance electrocatalysis. − The aquatic color mode (Figure h,i) and the color difference of the rainbow image further show the uneven thickness and surface/interface structure in PdPtBiTe DBs (Figure a), and the corresponding elemental mapping shows that the distribution of Pd, Pt, Bi, and Te directly affects the local coordination environment; Bi and Te are distributed around Pd and Pt, suggesting the formation of dual sites such as “Pd–Te,” “Pd–Bi,” “Pt–Te,” and “Pt–Bi,” (Figures b–f and S3), which induce a bifunctional mechanism for the alcohol oxidation. Additionally, the porous 3D Pd 74.6 Bi 3.2 Te 22.2 (named PdBiTe) and Pt 74.1 Bi 3.8 Te 22.1 (named PtBiTe) DBs were prepared using the same synthesis method (Figures S4 and S5).…”

Regulating and identifying the structures of PdAu alloys with splendid oxygen reduction activity for rechargeable zinc–air batteries

“…Additionally, line scanning profiles of Pd 55 Au 45 , taken after the cycling test, demonstrated the maintained homogeneous S7, ESI †). 23,32,[43][44][45][46][47][48][49]…”

Hierarchically hollow N-doped carbon-cobalt nanoparticle heterointerface for efficient bifunctional oxygen electrocatalysis

“…Currently, noble metal-based compounds are the best-known catalysts for ORR and OER. [12][13][14][15] However, these single precious metals generally deliver appealing singlereaction catalytic activity. Besides, the shortage of resources, high cost, scarcity, and poor stability seriously restrict their wide applications in ZABs.…”