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Title: Electrocatalysts, and fuel cells containing them

Abstract

Provided are electrocatalysts, fuel cells, methods of making fuel cells, and methods of generating an electric current, each featuring a platinum (Pt)-containing substrate in contact with an aqueous solution comprising Pb2+. Electrocatalysts of the invention are formed via underpotential deposition (UPD) when a trace amount of Pb2+ is present in the electrolyte of a half anodic cell for oxidizing formic acid using Pt as the anode. Surprisingly, the UPD process dramatically enhances the activity of formic acid oxidation, at least as much as 10-fold compared with palladium (Pd) black. In an embodiment, the electrocatalyst comprises a Pt-containing substrate, a submonolayer of lead (Pb) adsorbed onto the Pt-containing substrate, and an aqueous solution comprising Pb2+, wherein the concentration of Pb2+ in the aqueous solution is 10 to 500 μm.

Inventors:
;
Issue Date:
Research Org.:
Georgetown Univ., Washington, DC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1650928
Patent Number(s):
10658678
Application Number:
14/739,063
Assignee:
Georgetown University (Washington, DC)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
FG02-07ER15895
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/15/2015
Country of Publication:
United States
Language:
English

Citation Formats

Tong, YuYe J., and Chen, Dejun. Electrocatalysts, and fuel cells containing them. United States: N. p., 2020. Web.
Tong, YuYe J., & Chen, Dejun. Electrocatalysts, and fuel cells containing them. United States.
Tong, YuYe J., and Chen, Dejun. Tue . "Electrocatalysts, and fuel cells containing them". United States. https://www.osti.gov/servlets/purl/1650928.
@article{osti_1650928,
title = {Electrocatalysts, and fuel cells containing them},
author = {Tong, YuYe J. and Chen, Dejun},
abstractNote = {Provided are electrocatalysts, fuel cells, methods of making fuel cells, and methods of generating an electric current, each featuring a platinum (Pt)-containing substrate in contact with an aqueous solution comprising Pb2+. Electrocatalysts of the invention are formed via underpotential deposition (UPD) when a trace amount of Pb2+ is present in the electrolyte of a half anodic cell for oxidizing formic acid using Pt as the anode. Surprisingly, the UPD process dramatically enhances the activity of formic acid oxidation, at least as much as 10-fold compared with palladium (Pd) black. In an embodiment, the electrocatalyst comprises a Pt-containing substrate, a submonolayer of lead (Pb) adsorbed onto the Pt-containing substrate, and an aqueous solution comprising Pb2+, wherein the concentration of Pb2+ in the aqueous solution is 10 to 500 μm.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}

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