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Title: Oxygen Reduction at Very Low Overpotential on Nanoporous Ag Catalysts

Journal Article · · Advanced Energy Materials
 [1];  [2];  [3];  [3];  [4];  [3];  [5];  [1];  [3]
  1. Univ. of Delaware, Newark, DE (United States). Dept. of Physics and Astronomy
  2. Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering; Univ. of Delaware, Newark, DE (United States). Dept. of Chemical and Biomolecular Engineering
  3. Univ. of Delaware, Newark, DE (United States). Dept. of Chemical and Biomolecular Engineering
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Dept.
  5. Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Dept.

Here we report a monolithic nanoporous Ag (np-Ag) material, synthesized using the dealloying method, as high-performance catalysts for ORR in alkaline media. As shown in Scheme 1, when there is insufficient potential input, the O2 molecules are more likely to rebound off from a planar electrode surface (i.e. bulk polycrystalline metal, films made from nanoparticles or nanowires) before they could be reduced. In contrast, they are more likely to be trapped inside the monolithic nanoporous structure, contacting with catalytic surface for multiple time, which greatly enhances the chance for them to be fully reduced. As a result, the np-Ag catalyst is able to achieve an equivalent or better ORR performance than the state-of the-art Pt/C catalyst at low overpotentials, which is most desired in electrochemical energy applications for maximizing efficiency.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
DE-SC00112704
OSTI ID:
1214526
Report Number(s):
BNL-108336-2015-JA; KC0302010
Journal Information:
Advanced Energy Materials, Vol. 5, Issue 13; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 75 works
Citation information provided by
Web of Science

References (25)

Structurally ordered intermetallic platinum–cobalt core–shell nanoparticles with enhanced activity and stability as oxygen reduction electrocatalysts journal October 2012
A Reversible and Higher-Rate Li-O2 Battery journal July 2012
Metal-Air Batteries with High Energy Density: Li-Air versus Zn-Air journal December 2010
Electrocatalysis of oxygen reduction and small alcohol oxidation in alkaline media journal January 2007
High-performance Ag–Co alloy catalysts for electrochemical oxygen reduction journal August 2014
Nitrogen-Doped Carbon Nanotube Arrays with High Electrocatalytic Activity for Oxygen Reduction journal February 2009
A Soluble and Highly Conductive Ionomer for High-Performance Hydroxide Exchange Membrane Fuel Cells journal August 2009
Nitrogen-Doped Graphene as Efficient Metal-Free Electrocatalyst for Oxygen Reduction in Fuel Cells journal February 2010
Investigation of the Oxygen Reduction Activity on Silver - A Rotating Disc Electrode Study journal March 2010
Active and stable carbon nanotube/nanoparticle composite electrocatalyst for oxygen reduction journal May 2013
Improving Oxygen Reduction Reaction Activities on Carbon-Supported Ag Nanoparticles in Alkaline Solutions journal March 2010
Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reaction journal August 2011
A selective and efficient electrocatalyst for carbon dioxide reduction journal January 2014
Oxygen electroreduction on Ag(111): The pH effect journal January 2007
Electroreduction of dioxygen (ORR) in alkaline medium on Ag/C and Pt/C nanostructured catalysts—effect of the presence of methanol journal October 2004
Oxygen reduction in nanoporous metal–ionic liquid composite electrocatalysts journal October 2010
A Soluble and Highly Conductive Ionomer for High-Performance Hydroxide Exchange Membrane Fuel Cells journal August 2009
Origin of the Overpotential for Oxygen Reduction at a Fuel-Cell Cathode journal November 2004
Mn 3 O 4 Supported on Glassy Carbon: An Active Non-Precious Metal Catalyst for the Oxygen Reduction Reaction journal November 2012
Advanced zinc-air batteries based on high-performance hybrid electrocatalysts journal May 2013
Oxygen Reduction on Silver Low-Index Single-Crystal Surfaces in Alkaline Solution:  Rotating Ring DiskAg(hkl) Studies journal March 2006
Alkaline O 2 reduction on oxide-derived Au: high activity and 4e selectivity without (100) facets journal January 2014
Supportless Silver Nanowires as Oxygen Reduction Reaction Catalysts for Hydroxide-Exchange Membrane Fuel Cells journal August 2012
Non-precious metal electrocatalysts with high activity for hydrogen oxidation reaction in alkaline electrolytes journal January 2014
Synthesis of silver nanowires with different aspect ratios as alcohol-tolerant catalysts for oxygen electroreduction journal July 2008

Cited By (10)

Seed-mediated atomic-scale reconstruction of silver manganate nanoplates for oxygen reduction towards high-energy aluminum-air flow batteries journal September 2018
Enhancement in kinetics of the oxygen reduction on a silver catalyst by introduction of interlaces and defect-rich facets journal January 2017
Facile synthesis of silver nanowire-zeolitic imidazolate framework 67 composites as high-performance bifunctional oxygen catalysts journal January 2018
Rapid precipitation-reduction synthesis of carbon-supported silver for efficient oxygen reduction reaction in alkaline solution journal July 2019
Ag/ZrO 2 /MWCNT Nanocomposite as Non‐Platinum Electrocatalysts for Enhanced Oxygen Reduction Reaction journal May 2019
Electrocatalytically Active Silver Organic Framework: Ag(I)‐Complex Incorporated in Activated Carbon journal October 2019
Advanced Technologies for High‐Energy Aluminum–Air Batteries journal November 2018
Pt-free silver nanoalloy electrocatalysts for oxygen reduction reaction in alkaline media journal January 2016
‘Painting’ nanostructured metals—playing with liquid metal journal January 2018
A silver catalyst activated by stacking faults for the hydrogen evolution reaction journal October 2019