fulltext.study @t Gmail

Pulsed Laser Deposition of Co-nanoparticles embedded on B-thin film: A very efficient catalyst produced in a single-step process

Paper ID Volume ID Publish Year Pages File Format Full-Text
46989 46455 2011 8 PDF Available
Title
Pulsed Laser Deposition of Co-nanoparticles embedded on B-thin film: A very efficient catalyst produced in a single-step process
Abstract

Advances in “Nanotechnology” may open the way to replace expensive traditional noble-metal with cheaper new catalyst entries without losing efficiency. Here we show that Pulsed Laser Deposition of Co-nanoparticles partially embedded into B-thin film catalyst is a step towards this direction. Depending on the energy density, the laser process is able to produce well-dispersed spherical Co nanoparticles, with average size of 11–15 nm, partially embedded within B-based film matrix in a single-step deposition. This novel catalyst film exhibits catalytic activity comparable to that observed with commercial Pt/carbon black catalyst and significantly better than that with Pd/carbon black powder for hydrogen production by hydrolysis of chemical hydrides. Availability of a large number of under-coordinated active atoms owing to the size and shape of Co nanoparticles, polycrystalline nature of nanoparticles with linear defects in form of grain boundaries, and optimum interaction with reactant provided by electron enrichment from B, are the main features acquired by the Co nanoparticles that exhibit high catalytic efficiency. Boron plays a crucial role in avoiding coarsening of Co nanoparticles during both the reaction course and the heat treatment while offering, at same time, high tolerance against deactivation and oxidation by electron transfer to Co.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Spherical Co NPs partially embedded within B matrix are produced in a single-step deposition. ▶ This novel catalyst film used for hydrolysis of chemical hydrides. ▶ The catalytic activity is similar to Pt/C and significantly better than that with Pd/C catalyst powder.

Keywords
Co nanoparticles; H2 production; Pulsed Laser Deposition; Thin film catalyst
First Page Preview
Pulsed Laser Deposition of Co-nanoparticles embedded on B-thin film: A very efficient catalyst produced in a single-step process
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 103, Issues 1–2, 14 March 2011, Pages 31–38
Authors
, , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us