High-yield, size-controlled synthesis of silver nanoplates and their applications as methanol-tolerant electrocatalysts in oxygen reduction reaction

Lee, Chien‐Liang; Syu, Ciou-Mei; Chiou, Hsueh-Ping; Chen, Chih‐Hao; Yang, Haolin

doi:10.1016/j.ijhydene.2011.06.028

Cited by 25 publications

(8 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the morphologies of the different Ag nanocrystals were measured using TEM experiments, and are shown in Figure . The transmission electron microscope (TEM) image for the nanoprisms (Figure A) exhibits many triangular plates and some larger disks, being consistent with the results in our previous report . Some nanoprisms as shown in Figure S1 were perpendicular to the copper grid coated with carbon film, displaying ordered stacking, and clearly revealing their thicknesses upon electron beam detection.…”

Section: Resultssupporting

confidence: 89%

Shape‐Dependent Properties of Silver Nanocrystals as Electrocatalysts toward Glucose Oxidation Reaction

Chao

Hsu

et al. 2016

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

Ag nanoprisms (mean height 136 nm) and Ag nanodisks (mean diameter 41 nm) that are dominated by (111) planes and Ag nanocubes (mean edge length 38 nm) enclosed by (100) planes were prepared and used as catalysts for the D‐glucose oxidation reaction (GOR). A systematic study of the specific activities of these three Ag catalysts, in terms of the electrochemical real surface area (ERSA), was performed to assess their ability to electrocatalyze glucose oxidation. By measuring current per ERSA for glucose oxidation, an order of nanoprisms > nanocubes > nanodisks was obtained for the activity of catalysis of the intermediate on the Ag2O on their surfaces, ascribed to diffusion‐controlled processes. Among these catalysts, the nanoprisms were more sensible to produce Ag2O and AgO after GOR. The results of cyclic tests indicated a higher D‐glucose‐tolerance of the nanoprisms and nanodisks. In addition, the amperometric analyses determined sensitivities of 14 mA mM−1 cm−2, 9.9 mA mM−1 cm−2, and 5.5 mA mM−1 cm−2 for the nanoprisms, nanocubes, and nanodisks, respectively. The comparison based on the same ERSA showed that the nanoprisms had better activity and sensitivity.

show abstract

Section: Resultssupporting

confidence: 89%

Shape‐Dependent Properties of Silver Nanocrystals as Electrocatalysts toward Glucose Oxidation Reaction

Chao

Hsu

et al. 2016

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

show abstract

“…An interesting aspect is the selection of the initial seeds: why are the anisotropic seeds, less thermodynamically stable, selected to grow over spherical seeds? What induces the twin defects described above, and what is the mechanism that removes the other shapes of NPs to leave in solution up to 90% of anisotropic NCs? , …”

Section: Defect-induced Anisotropymentioning

confidence: 99%

Two-Dimensional Colloidal Nanocrystals

et al. 2016

View full text Add to dashboard Cite

Abstract:In this paper, we review recent progresses on colloidal growth of 2D nanocrystals.We identify four main sources of anisotropy which lead to the formation of plate-and sheetlike colloidal nanomaterials. Defect induced anisotropy is a growth method which relies on the presence of topological defects at the nanoscale to induce 2D shapes objects. Such a method is particularly important in the growth of metallic nanoobjects. Another way to induce anisotropy is based on ligand engineering. The availability of some nanocrystal facets can be tuned by selectively covering the surface with ligands of tunable thickness. Cadmium chalcogenides nanoplatelets (NPLs) strongly rely on this method which offers atomic control in the thinner direction, down to a few monolayers. 2D objects can also be obtained by post or in situ self-assembly of nanocrystals. This growth method differs from the previous ones in the sense that the elementary objects are not molecular precursors, and is a common method for lead chalcogenide compounds. Finally, anisotropy may simply rely on the lattice anisotropy itself as it is common for rod-like nanocrystals. Colloidally grown Transition Metal DiChalcogenides (TMDC) in particular result from such process. We also present hybrid syntheses which combine several of the previously described methods and other paths, such as cation exchange, which expand the range of available materials. Finally, we discuss in which sense 2D-objects differ from 0D nanocrystals and review some of their applications in optoelectronics, including lasing and photodetection, and biology.

show abstract

“…59 In the rst step, oxygen molecules from the air diffuse through the air electrode and absorb on the surface of the air electrode near the solution side, which can be described in eqn (4). In the second step, absorbed oxygen molecules are electrochemically reduced and forms OH À , which can be described in eqn (5).…”

Section: Electrochemical Activity Of Synthesized Catalysts Of Orrmentioning

confidence: 99%

“…3,4 However, the low abundance of Pt in the earth's crust together with its high price limits its wide and practical applications in fuel cells. In recent years, various efforts have been made to explore non-Pt-based catalysts for ORR, such as Ag-based catalysts, 5,6 Pd-based materials, 7,8 N-doped carbon, [9][10][11] M-N 4 -macrocycles, 12 Fe-N-C hybrids [13][14][15] as well as some transition metal oxides. [16][17][18][19] Nevertheless, exploiting inexpensive and highly active electrocatalysts for ORR remains a great challenge.…”

Section: Introductionmentioning

confidence: 99%

Improvement of O₂ adsorption for α-MnO₂ as an oxygen reduction catalyst by Zr⁴⁺ doping

Wang

et al. 2018

RSC Adv.

View full text Add to dashboard Cite

show abstract

High-yield, size-controlled synthesis of silver nanoplates and their applications as methanol-tolerant electrocatalysts in oxygen reduction reaction

Cited by 25 publications

References 49 publications

Shape‐Dependent Properties of Silver Nanocrystals as Electrocatalysts toward Glucose Oxidation Reaction

Shape‐Dependent Properties of Silver Nanocrystals as Electrocatalysts toward Glucose Oxidation Reaction

Two-Dimensional Colloidal Nanocrystals

Improvement of O₂ adsorption for α-MnO₂ as an oxygen reduction catalyst by Zr⁴⁺ doping

Contact Info

Product

Resources

About

High-yield, size-controlled synthesis of silver nanoplates and their applications as methanol-tolerant electrocatalysts in oxygen reduction reaction

Cited by 25 publications

References 49 publications

Shape‐Dependent Properties of Silver Nanocrystals as Electrocatalysts toward Glucose Oxidation Reaction

Shape‐Dependent Properties of Silver Nanocrystals as Electrocatalysts toward Glucose Oxidation Reaction

Two-Dimensional Colloidal Nanocrystals

Improvement of O2 adsorption for α-MnO2 as an oxygen reduction catalyst by Zr4+ doping

Contact Info

Product

Resources

About

Improvement of O₂ adsorption for α-MnO₂ as an oxygen reduction catalyst by Zr⁴⁺ doping