Topics

Engineering of Nitrogen Coordinated Single Cobalt Atom Moieties for Oxygen Electroreduction.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "Engineering of Nitrogen Coordinated Single Cobalt Atom Moieties for Oxygen Electroreduction."

The nitrogen coordinated single cobalt atoms embedded in carbon matrix, i.e. Co/N/C material, is cost-efficient and free from iron-ion induced Fenton reagent, which has been thus considered as a promising candidate to replace the well-accepted Pt-based and Fe/N/C materials for oxygen reduction reaction (ORR). Recently, the pyrolysis of metal-organic framework (MOF) precursors has been investigated to achieve well-defined Co/N/C catalysts with high ORR activity. However, the relationships among the composition/structure of MOF precursor, the derived catalysts and ORR performance have been rarely touched in specialty; while the regulations to achieve single-atom Co/N/C catalysts derived from MOF are confusing. Herein, we engineer several Co-doped MOF (zeolitic imidazolate frameworks, to be specific) precursors with different compositions and structures by tuning synthesis protocols (e.g., ratios, cobalt sources and reaction time), and investigate the derived catalysts and their ORR properties. The regulations to single-atom Co/N/C are revealed in this work. The superior ORR activity and durability of the optimized Co/N/C catalysts are revealed and attributed to the well-defined Co-Nx moieties and their stable nanostructures.

Affiliation

Journal Details

This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
Pages:

Links

DeepDyve research library

PubMed Articles [15550 Associated PubMed Articles listed on BioPortfolio]

Direct imaging of light-element impurities in graphene reveals triple-coordinated oxygen.

Along with hydrogen, carbon, nitrogen and oxygen are the arguably most important elements for organic chemistry. Due to their rich variety of possible bonding configurations, they can form a staggerin...

Visible-light photocatalytic degradation of bisphenol A using cobalt-to-oxygen doped graphitic carbon nitride with nitrogen vacancies via metal-to-ligand charge transfer.

As an environmentally friendly and promising semiconductor, graphitic carbon nitride (g-CN) was widely used in photocatalytic treatment of aqueous organic pollutants. In this study, cobalt-to-oxygen d...

Tuning the catalytic activity of a single Mo atom supported on graphene for nitrogen reduction via Se atom doping.

Electrochemical nitrogen (N2) fixation as an effective method has realized the sustainable production of ammonia where efficient electrocatalysts for converting N2 into NH3 at room temperature have be...

Switching Co/N/C Catalysts for Heterogeneous Catalysis and Electrocatalysis by Controllable Pyrolysis of Cobalt Porphyrin.

Identifying the optimal synthetic and structural parameters in preparing pyrolyzed metal/nitrogen/carbon (M/N/C) materials is crucial for developing effective catalysts for many important catalytic pr...

Use of cobalt(II) chelates of monothiol-containing ligands for the removal of nitric oxide.

It is first reported herein that cobalt(II) complexes solution of monothiol-containing multidentate ligands are used to remove low concentration of nitric oxide (NO). These chelating ligands are water...

Clinical Trials [5223 Associated Clinical Trials listed on BioPortfolio]

Use of 50% Nitrous Oxide / 50% Oxygen Premix During Liver Biopsy of Focal Lesion

A 50% nitrous oxide / 50% oxygen premix is administrated to the patient during the realization of liver biopsy in order to relax him and to reduce his pain during this painful medical trea...

Cryogenic Preservation of Spermatozoa

The reference technique for the conservation of gametes is storage in liquid nitrogen but new vats of nitrogen vapor (storage over liquid nitrogen) or in dry phase (storage in an insulated...

Study of the Efficacy of Kalinox® 170 Bar in Adult Oncology

In the oncology practice, The National Union of the Centres of Fight Against the Cancer recently published the Standards, Options and Recommendations for the coverage of the pains provoked...

Effects of Coordinated Care for Disabled Medicaid Recipients

The purpose of this study is to improve the quality of care for individuals with multiple chronic conditions, health care systems have begun turning to coordinated care. Although coordinat...

Comparison Between Injection Molded PEEK Framework and Cobalt Chromium Framework in Removable Partial Denture Regarding Retention

This study is aiming to evaluate the retentive forces in PEEK framework RPD compared to Cobalt-Chrome framework RPD during attachment/detachment cycles in mandibular kennedy class I edentu...

Medical and Biotech [MESH] Definitions

A non-hydrolyzable analog of GTP, in which the oxygen atom bridging the beta to the gamma phosphate is replaced by a nitrogen atom. It binds tightly to G-protein in the presence of Mg2+. The nucleotide is a potent stimulator of adenylate cyclase.

Metalloproteins that function as oxygen transport proteins in the HEMOLYMPH of MOLLUSKS and ARTHROPODS. They are characterized by two copper atoms, coordinated with HISTIDINE residues, that reversibly bind a single oxygen molecule; they do not contain HEME groups.

Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions and fluorocarbon blood substitutes.

5'-Adenylic acid, monoanhydride with imidodiphosphoric acid. An analog of ATP, in which the oxygen atom bridging the beta to the gamma phosphate is replaced by a nitrogen atom. It is a potent competitive inhibitor of soluble and membrane-bound mitochondrial ATPase and also inhibits ATP-dependent reactions of oxidative phosphorylation.

Five-carbon furanose sugars in which the OXYGEN is replaced by a NITROGEN atom.

Quick Search


DeepDyve research library

Searches Linking to this Article