Site-Dependent Activity of Atomic Ti Catalysts in Al-Based Hydrogen Storage Materials.
Doping catalytically inactive materials with dispersed atoms of an active species is a promising route toward realizing ultradilute binary catalyst systems. Beyond catalysis, strategically placed metal atoms can accelerate a wide range of solid-state reactions, particularly in hydrogen storage proce...
| Published in: | Journal of the American Chemical Society Vol. 134; no. 25; pp. 10381 - 10385 |
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| Main Authors: | , , , , , |
| Format: | Article |
| Published: |
American Chemical Society
6/27/2012
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| Subjects: | |
| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=77605172&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 77605172 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 6/27/2012 vid: 134 iid: 25 pid: 997 pub: American Chemical Society artinfo: ui: 77605172 10.1021/ja304203y ppf: 10381 ppct: 4 formats: tig: atl: Site-Dependent Activity of Atomic Ti Catalysts in Al-Based Hydrogen Storage Materials. aug: au: Al-Mahboob, Abdullah Muller, Erik Karim, Altaf Muckerman, James T. Ciobanu, Cristian V. Sutter, Peter affil: Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States Department of Mechanical Engineering, Materials Science Program, Colorado School of Mines, Golden, Colorado 80401, United States su: Titanium catalyst activity Hydrogen storage Aluminum Hydrogenation Doping agents (Chemistry) Dissociation (Chemistry) sug: subj: Titanium catalyst activity Hydrogen storage Aluminum Hydrogenation Doping agents (Chemistry) Dissociation (Chemistry) ab: Doping catalytically inactive materials with dispersed atoms of an active species is a promising route toward realizing ultradilute binary catalyst systems. Beyond catalysis, strategically placed metal atoms can accelerate a wide range of solid-state reactions, particularly in hydrogen storage processes. Here we analyze the role of atomic Ti catalysts in the hydrogenation of Al-based hydrogen storage materials. We show that Ti atoms near the Al surface activate gas-phase H a key step toward hydrogenation. By controlling the placement of Ti, we have found that the overall reaction, comprising H dissociation and H spillover onto the Al surface, is governed by a pronounced trade-off between lowering of the H dissociation barrier and trapping of the products near the active site, with a sharp maximum in the overall activity for Ti in the subsurface layer. Our findings demonstrate the importance of controlling the placement of the active species in optimizing the activity of dilute binary systems. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2012 holdings: @attributes: islocal: N |
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