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Title: Increasing Stability and Activity of Core-Shell Catalysts by Preferential Segregation of Oxide on Edges and Vertexes: Oxygen Reduction on Ti-Au@Pt/C

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.6b04999· OSTI ID:1329805
 [1];  [1];  [1];  [2];  [3];  [1];  [1];  [4];  [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Stony Brook Univ., NY (United States)
  3. Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics
  4. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)

We describe a new class of core-shell nanoparticle catalysts having edges and vertexes covered by refractory metal oxide that preferentially segregates onto these catalyst sites. The monolayer shell is deposited on the oxidefree core atoms. The oxide on edges and vertexes induces high catalyst’s stability and activity. The catalyst and synthesis are exemplified by fabrication of Au nanoparticles doped by Ti atoms that segregate as oxide onto low–coordination sites of edges and vertexes. Pt monolayer shell deposited on Au sites has the mass and specific activities for the oxygen reduction reaction about 13 and 5 times higher than those of commercial Pt/C catalysts. The durability tests show no activity loss after 10000 potential cycles from 0.6 to 1.0V. The superior activity and durability of the Ti-Au@Pt catalyst originate from protective Ti oxide located at the most dissolution-prone edge and vertex sites, and Au-supported active and stable Pt shell.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1329805
Report Number(s):
BNL-112749-2016-JA; R&D Project: MA510MAEA; KC0302010
Journal Information:
Journal of the American Chemical Society, Vol. 138, Issue 29; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 71 works
Citation information provided by
Web of Science

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  • Escudero-Escribano, María; Verdaguer-Casadevall, Arnau; Malacrida, Paolo
  • Journal of the American Chemical Society, Vol. 134, Issue 40 https://doi.org/10.1021/ja306348d
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Cited By (15)

A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells journal January 2017
Intermetallic Pd 3 Pb ultrathin nanoplate-constructed flowers with low-coordinated edge sites boost oxygen reduction performance journal January 2019
Surface-modulated palladium-nickel icosahedra as high-performance non-platinum oxygen reduction electrocatalysts journal July 2018
Nanoporous bimetallic Zn/Fe–N–C for efficient oxygen reduction in acidic and alkaline media journal January 2020
Core-Shell Structuring of Pure Metallic Aerogels towards Highly Efficient Platinum Utilization for the Oxygen Reduction Reaction journal February 2018
Kern-Schale-Strukturierung rein metallischer Aerogele für eine hocheffiziente Nutzung von Platin für die Sauerstoffreduktion journal February 2018
Atomically and Electronically Coupled Pt and CoO Hybrid Nanocatalysts for Enhanced Electrocatalytic Performance journal December 2016
Co@C Nanoparticle Embedded Hierarchically Porous N-Doped Hollow Carbon for Efficient Oxygen Reduction journal June 2018
Platinum-Palladium Core-Shell Nanoflower Catalyst with Improved Activity and Excellent Durability for the Oxygen Reduction Reaction journal January 2018
Surface Oxidation of AuNi Heterodimers to Achieve High Activities toward Hydrogen/Oxygen Evolution and Oxygen Reduction Reactions journal February 2018
The OH -driven synthesis of Pt–Ni nanocatalysts with atomic segregation for alkaline hydrogen evolution reaction journal January 2019
Structure–Activity/Stability Correlations from the Electrochemical Dynamic Responses of Titanium Anode Coatings Formed of Ordered TiO 2 @RuO 2 Microspheres journal January 2018
Shape‐Controlled Synthesis of Colloidal Metal Nanocrystals by Replicating the Surface Atomic Structure on the Seed journal April 2018
Hydrogen evolution electrocatalysis with binary-nonmetal transition metal compounds journal January 2017
Engineering stepped edge surface structures of MoS 2 sheet stacks to accelerate the hydrogen evolution reaction journal January 2017

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