skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Underpotential deposition-mediated layer-by-layer growth of thin films

Patent ·
OSTI ID:1179806
;

A method of depositing contiguous, conformal submonolayer-to-multilayer thin films with atomic-level control is described. The process involves the use of underpotential deposition of a first element to mediate the growth of a second material by overpotential deposition. Deposition occurs between a potential positive to the bulk deposition potential for the mediating element where a full monolayer of mediating element forms, and a potential which is less than, or only slightly greater than, the bulk deposition potential of the material to be deposited. By cycling the applied voltage between the bulk deposition potential for the mediating element and the material to be deposited, repeated desorption/adsorption of the mediating element during each potential cycle can be used to precisely control film growth on a layer-by-layer basis. This process is especially suitable for the formation of a catalytically active layer on core-shell particles for use in energy conversion devices such as fuel cells.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-98CH10886
Assignee:
Brookhaven Science Associates, LLC (Upton, NY)
Patent Number(s):
9,034,165
Application Number:
13/000,800
OSTI ID:
1179806
Country of Publication:
United States
Language:
English

References (11)

Acid electrolyte solution and process for the electrodeposition of copper-rich alloys exploiting the phenomenon of underpotential deposition patent January 1995
Carbon monoxide tolerant electrocatalyst with low platinum loading and a process for its preparation patent December 2003
Hydrogen absorption induced metal deposition on palladium and palladium-alloy particles patent March 2009
Platinum- and platinum alloy-coated palladium and palladium alloy particles and uses thereof patent-application June 2006
Synthesis of Metal-Metal Oxide Catalysts and Electrocatalysts Using a Metal Cation Adsorption/Reduction and Adatom Replacement by More Noble Ones patent-application November 2007
Electrochemical Designing of Au/Pt Core Shell Nanoparticles as Nanostructured Catalyst with Tunable Activity for Oxygen Reduction journal February 2007
Overpotential deposition of Ag monolayer and bilayer on Au(111) mediated by Pb adlayer underpotential deposition/stripping cycles journal August 2003
Platinum Monolayer on Nonnoble Metal−Noble Metal Core−Shell Nanoparticle Electrocatalysts for O2 Reduction journal December 2005
Pt submonolayers on metal nanoparticles—novel electrocatalysts for H2 oxidation and O2 reduction journal November 2003
Metal monolayer deposition by replacement of metal adlayers on electrode surfaces journal March 2001
Preparation of Pd−Pt Bimetallic Colloids with Controllable Core/Shell Structures journal July 1997

Similar Records

Related Subjects

36 MATERIALS SCIENCE
30 DIRECT ENERGY CONVERSION
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS