In situ Spectroscopic Insight into the Origin of the Enhanced Performance of Bimetallic nanocatalysts towards ORR.

08:00 EDT 12th September 2019 | BioPortfolio

Summary of "In situ Spectroscopic Insight into the Origin of the Enhanced Performance of Bimetallic nanocatalysts towards ORR."

It is vital to understand the oxygen reduction reaction (ORR) mechanism at the molecular level for the rational design and synthesis of high activity fuel cell catalysts. Surface enhanced Raman spectroscopy (SERS) is a powerful technique capable of detecting the bond vibrations of surface species in the low wavenumber range, however using it to probe practical nanocatalysts remains extremely challenging. Herein, shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) was used to investigate ORR processes on the surface of novel bimetallic Pt3Co nanocatlyst satellite structures. Direct spectroscopic evidence of *OOH suggests that ORR undergoes an associative mechanism on Pt3Co in both acidic and basic environments. Density functional theory (DFT) calculations show that the weak *O adsorption arises from electronic effect on the Pt3Co surface and accounts for enhanced ORR activity. This work shows SHINERS is a promising technique for the real-time observation of catalytic processes.


Journal Details

This article was published in the following journal.

Name: Angewandte Chemie (International ed. in English)
ISSN: 1521-3773


DeepDyve research library

PubMed Articles [17468 Associated PubMed Articles listed on BioPortfolio]

In-Situ Transformation of Prussian-Blue Analogue-Derived Bimetallic Carbide Nanocubes in Water Oxidation: Applications for Energy Storage and Conversion.

Using bimetallic Prussian-blue analogue (PBA) as precursor is effective for preparing electrocatalysts for oxygen evolution reaction (OER), however, the role of these PBA-derived catalysts in OER is s...

Formation and Functioning of Bimetallic Nanocatalysts: The Power of X-ray Probes.

Bimetallic nanocatalysts are key enablers of current chemical technologies, including car exhaust converters and fuel cells, and play a crucial role in industry to promote a wide range of chemical rea...

A bimetallic sulfide CuCoS with good synergistic effect was constructed to drive high performance photocatalytic hydrogen evolution.

In order to further improve the photocatalytic performance of the semiconductor photocatalyst, a photocatalytic hydrogen production performance was measured using a bimetallic sulfide photocatalyst. O...

Metal Organic Framework-Templated Synthesis of Bimetallic Selenides with Rich Phase Boundaries for Sodium-Ion Storage and Oxygen Evolution Reaction.

Two-phase or multi-phase compounds have been explored to exhibit good electrochemical performance for energy applications, however, the mechanism insights into these materials, especially the performa...

Bimetallic Fe/Al system: An all-in-one solid-phase Fenton reagent for generation of hydroxyl radicals under oxic conditions.

In the classic Fenton reaction, both HO and ferrous ion (Fe(II)) are required under a narrow low pH range to produce hydroxyl radicals (OH). The modified Fenton processes including heterogeneous Fento...

Clinical Trials [6168 Associated Clinical Trials listed on BioPortfolio]

Contrast-Enhanced MRI in Women With Ductal Breast Carcinoma in Situ and in Healthy Volunteers

RATIONALE: Diagnostic procedures, such as contrast-enhanced MRI, may help find and diagnose ductal carcinoma in situ. PURPOSE: This randomized clinical trial is studying contrast-enhanced...

Magnetic Resonance Spectroscopic Imaging of the Prostate at 3 Tesla

The purpose of this study is to determine the benefits of Magnetic Resonance Imaging (MRI) combined with Magnetic Resonance Spectroscopic Imaging (MRSI), on an instrument called a 3.0 Tes...

Spectroscopic Evaluation of Cervical Neoplasia

The overall objective of this study is to evaluate whether fluorescence and reflectance spectroscopy can improve the ability to detect the presence of premalignant lesions on the cervix. ...

Optimization of Spectroscopic Imaging Parameters and Procedures for Prostate at 3 Tesla Using an External Probe

Magnetic resonance (MR) spectroscopic techniques are to be developed to obtain the best data possible at 3 Tesla (3T) for the prostate.

Magnetic Resonance Imaging and Magnetic Resonance Spectroscopic Imaging in Evaluating Patients Who Are Undergoing Treatment for Gliomas

RATIONALE: Diagnostic procedures, such as magnetic resonance imaging (MRI) and magnetic resonance spectroscopic imaging (MRSI), (done before, during, and after treatment) may help doctors ...

Medical and Biotech [MESH] Definitions

A lesion with cytological characteristics associated with invasive adenocarcinoma but the tumor cells are confined to the GLANDULAR EPITHELIAL CELLS of origin. Adenocarcinoma in situ of the CERVIX and the LUNG are the most common.

A condition in which abnormal cells have not spread outside the duct, lobule, or nipple to other tissues of the breast. There are 3 types of breast carcinoma in situ: DUCTAL CARCINOMA IN SITU; LOBULAR CARCINOMA IN SITU; and PAGET DISEASE OF THE NIPPLE

A lesion with cytological characteristics associated with invasive carcinoma but the tumor cells are confined to the epithelium of origin, without invasion of the basement membrane.

A technique that labels specific sequences in whole chromosomes by in situ DNA chain elongation or PCR (polymerase chain reaction).

A malignancy arising in uterine cervical epithelium and confined thereto, representing a continuum of histological changes ranging from well-differentiated CIN 1 (formerly, mild dysplasia) to severe dysplasia/carcinoma in situ, CIN 3. The lesion arises at the squamocolumnar cell junction at the transformation zone of the endocervical canal, with a variable tendency to develop invasive epidermoid carcinoma, a tendency that is enhanced by concomitant human papillomaviral infection. (Segen, Dictionary of Modern Medicine, 1992)

Quick Search

DeepDyve research library

Searches Linking to this Article