Pd nanoparticles deposited on Co(OH)₂ nanoplatelets as a bifunctional electrocatalyst and their application in Zn–air and Li–O₂ batteries

Abstract

Development of affordable electrocatalysts for both oxygen reduction and evolution reactions (ORR/OER) has received great interest due to their importance in metal-air batteries and regenerative fuel cells. We develop the...

Nanoscale Pd Supported on Layered Co(OH)2 as Efficient Catalysts for Solvent‐Free Oxidation of Benzyl Alcohol

“…The total pore volume is about 0.79 m 3 g −1 , and the average pore size is about 20.14 nm. Furthermore, the calculated BET surface area of the Pd/Co(OH) 2 nanosheets is about 156.14 m 3 g −1 , which is much larger than other nanostructure Co(OH) 2 that has been reported [24,25] …”

“…Furthermore, the calculated BET surface area of the Pd/Co(OH) 2 nanosheets is about 156.14 m 3 g À 1 , which is much larger than other nanostructure Co(OH) 2 that has been reported. [24,25] In order to clarify the electronic properties of Pd NPs anchored on catalyst samples, X-ray photoelectron spectroscopy (XPS) was used to characterize the surface and near- surface properties of the two catalysts. Figure 4 [26][27][28] A quantitative analysis of the XPS peaks (listed in Table S4) shows that the peaks of metallic Pd 0 in Co(OH) 2 catalyst possess more area, which indicates that the ratio of Pd 0 : Pd 2 + is much higher compared with Pd/AC.…”

Metathesis Reaction to Form Nanosheet-Structured Co(OH)2 Deposited on N-Doped Carbon as Composite Electrocatalysts for Oxygen Reduction

“…30 The I D /I G values for these samples are all greater than 1.0, meaning a high degree of defects. Furthermore, the peak at 669 cm −1 can be assigned to the A 1g symmetric stretching mode of Co−O and the other two weak peaks at 474 and 510 cm −1 are attributed to the E g and F 2g modes of Co(OH) 2 , 19,31,32 respectively, demonstrating the existence of Co(OH) 2 . 19,31,32 Morphologies of these samples were first characterized by SEM.…”

“…As a cobalt-based compound, cobalt hydroxide (Co­(OH) 2 ) itself can be a two-dimensional (2D) nanomaterial with an open structure, advantageous to reactant diffusion and electron transfer. Such a structure can easily have accessible electrocatalytic active sites, giving good catalytic activities. − This Co­(OH) 2 has also attracted intensive research interest for electrochemical capacitors, − batteries, and electrocatalysts. , This Co­(OH) 2 can also serve as a good pseudocapacitive material for supercapacitors based on its layered structure …”

“…13−15 This Co(OH) 2 has also attracted intensive research interest for electrochemical capacitors, 16−18 batteries, and electrocatalysts. 19,20 This Co(OH) 2 can also serve as a good pseudocapacitive material for supercapacitors based on its layered structure. 16 Regarding the preparation of Co(OH) 2 , there are several methods in the literature, such as the electrodeposition method, 13,16 hydrothermal process, 21,22 and chemical deposition method.…”