A facile method for the synthesis of Co-core Au-shell nanohybrid

Sardar, Debasmita; Neogi, S. K.; Bandyopadhyay, S.; Satpati, Biswarup; Jain, Ruchi; Gopinath, Chinnakonda S.; Bala, Tanushree

doi:10.1039/c4nj00733f

Cited by 9 publications

(3 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The low energy peak at 782.0 eV and its satellite peak at 785.9 eV for Co (2p 3/2 ) confirm the formation of fcc Co (0) NPs. The higher energy peak at 798.8 eV along with a satellite peak at 803.0 eV can be assigned to the binding energy of cobalt (2p 1/2 ) with a higher oxidation state (Figure f), which corroborates with XRD results . The N 1s peak shows pyridinic, pyrrolic and graphitic nitrogen at 398.0, 399.0, and 401.0 eV, respectively (Figure g) .…”

Section: Results and Discussionsupporting

confidence: 80%

“…The higher energy peak at 798.8 eV along with a satellite peak at 803.0 eV can be assigned to the binding energy of cobalt (2p 1/2 ) with a higher oxidation state (Figure 2f), which corroborates with XRD results. 33 The N 1s peak shows pyridinic, pyrrolic and graphitic nitrogen at 398.0, 399.0, and 401.0 eV, respectively (Figure 2g). 34 The peak at 163.7 eV is a characteristic peak for S−C bond of thiophene group, whereas the peak at 168.3 eV is attributed to oxide of sulfur which confirms successful doping of sulfur into the graphene (Figure 2h).…”

Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

See 1 more Smart Citation

Covalent versus Charge Transfer Modification of Graphene/Carbon-Nanotubes with Vitamin B1: Co/N/S–C Catalyst toward Excellent Oxygen Reduction

Vij

Tiwari

Kim

2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

High-performance nonprecious cathodic catalysts for oxygen reduction are highly demanded for low-temperature polymer electrolyte membrane fuel cells (PEMFCs). Here, we report a noble-meta- free, nitrogen and sulfur codoped graphene(G)/carbon-nanotube(CNT) material decorated with Co nanoparticles (NPs), which serve as catalytic sites for excellent oxygen reduction reaction (ORR) in basic and acidic media. Out of the cathodic catalysts synthesized by either covalent (cov) or charge transfer (CT) modification of graphen oxide (GO) with thiamine (Th: Vitamin B1), ThG/CNT/Co-cov shows more promising ORR properties than ThG/CNT/Co-CT. Catalyst ThG/CNT/Co-cov exhibits onset/halfwave potentials of 0.95/0.86 V in 0.1 M KOH and 0.92/0.83 V in 0.1 M HClO4, which are comparable to those of commercial catalyst Pt/C (0.95/0.86 V). As compared to Pt/C, our catalyst shows higher current densities of 6.72 mA cm(-2) in basic medium and 7.08 mA cm(-2) in acidic medium at 0.55 V (vs reversible hydrogen electrode (RHE)). It also exhibits better catalytic stability and methanol tolerance. High catalytic efficiency and stability of ThG/CNT/Co-cov show a promising prospect of materialization of PEMFCs for clean energy production.

show abstract

Section: Results and Discussionsupporting

confidence: 80%

Section: Acs Applied Materials and Interfacesmentioning

confidence: 99%

Covalent versus Charge Transfer Modification of Graphene/Carbon-Nanotubes with Vitamin B1: Co/N/S–C Catalyst toward Excellent Oxygen Reduction

Vij

Tiwari

Kim

2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The advantages of using gold as a core or shell component depends also on its chemical interaction with other materials. [22][23][24][25] Recent studies show improvements in targeted drug delivery using gold based core-shell nanoparticles as the delivery vehicle. These studies illustrate the versatility of gold nanoparticles as either a core or shell component.…”

Section: Introductionmentioning

confidence: 99%