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Title: Tuning electrocatalytic activity of Pt monolayer shell by bimetallic Ir-M (M=Fe, Co, Ni or Cu) cores for the oxygen reduction reaction

Journal Article · · Nano Energy
 [1];  [2];  [1];  [1];  [3];  [3];  [3];  [3];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. SABIC Technology Center, Riyadh (Saudi Arabia)
  3. Korea Institute of Energy Research, Daejeon (Korea)

Here, platinum monolayer electrocatalyst are known to exhibit excellent oxygen reduction reaction (ORR) activity depending on the type of substrate used. Here we demonstrate a relationship between the ORR electrocatalytic activity and the surface electronic structure of Pt monolayer shell induced by various IrM bimetallic cores (M=Fe, Co, Ni or Cu). The relationship is rationalized by comparing density functional theory calculations and experimental results. For an efficient Pt monolayer electrocatalyst, the core should induce sufficient contraction to the Pt shell leading to a downshift of the d-band center with respect to the Fermi level. Depending on the structure of the IrM, relative to that of pure Ir, this interaction not only alters the electronic and geometric structure but also induces segregation effects. Combined these effects significantly enhance the ORR activities of the Pt monolayer shell on bimetallic Ir cores electrocatalysts.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704; SC0012704; DEAC02-05CH11231
OSTI ID:
1346747
Alternate ID(s):
OSTI ID: 1397982
Report Number(s):
BNL-113589-2017-JA; R&D Project: MA510MAEA; KC0203010
Journal Information:
Nano Energy, Vol. 29, Issue C; ISSN 2211-2855
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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Cited By (9)

1D N-doped hierarchically porous hollow carbon tubes derived from a supramolecular template as metal-free electrocatalysts for a highly efficient oxygen reduction reaction journal January 2018
Rational Design and Synthesis of Low-Temperature Fuel Cell Electrocatalysts journal March 2018
Core–shell structured PtRu nanoparticles@FeP promoter with an efficient nanointerface for alcohol fuel electrooxidation journal January 2019
Shape‐Controlled Synthesis of Colloidal Metal Nanocrystals by Replicating the Surface Atomic Structure on the Seed journal April 2018
Surface composition-tunable octahedral PtCu nanoalloys advance the electrocatalytic performance on methanol and ethanol oxidation journal July 2019
Electrocatalysts Prepared by Galvanic Replacement journal March 2017
Ag/ZrO 2 /MWCNT Nanocomposite as Non‐Platinum Electrocatalysts for Enhanced Oxygen Reduction Reaction journal May 2019
A Synthetic Route for the Preparation of Core-Shell Nanoparticles Using a Protective Carbon Layer and Ozone Treatment journal January 2018
Enhanced Oxygen Reduction Reaction Activity on Pt-Monolayer-Shell PdIr/Ni-Core Catalysts journal January 2018