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Enhanced Stability and Electrochemical Performance of Carbon‐Coated Ti3+ Self‐Doped TiO2‐Reduced Graphene Oxide Hollow Nanostructure‐Supported Pt‐Catalyzed Fuel Cell Electrodes

Sung, Chang Hyun et al.

Advanced materials interfaces. Volume 4:Issue 21 (2017); pp n/a-n/a -- Wiley-VCH

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  • Title:
    Enhanced Stability and Electrochemical Performance of Carbon‐Coated Ti3+ Self‐Doped TiO2‐Reduced Graphene Oxide Hollow Nanostructure‐Supported Pt‐Catalyzed Fuel Cell Electrodes
  • Author: Sung, Chang Hyun;
    Boppella, Ramireddy;
    Yoo, Jai‐Wook;
    Lim, Dong‐Hee;
    Moon, Byung‐Moo;
    Kim, Dong Ha;
    Kim, Jin Young
  • Found In: Advanced materials interfaces. Volume 4:Issue 21 (2017); pp n/a-n/a
  • Journal Title: Advanced materials interfaces
  • Subjects: Materials science--Periodicals; catalyst support--enhanced stability--hollow structures--PEMFCs--rGO/TiO2; Dewey: 620.11
  • Rights: legaldeposit
  • Publication Details: Wiley-VCH
  • Abstract: Abstract:

    Stable alternative catalyst supports to replace conventional carbon‐based materials in polymer electrolyte membrane fuel cells (PEMFCs) are being explored to achieve dramatic improvements in the performance and durability of fuel cells. Herein, conductive Ti 3+ self‐doped and carbon‐coated TiO2‐reduced graphene oxide (rGO) hollow nanosphere‐supported Pt nanoparticles (Pt/rGO/TiO2) are investigated as cathode electrocatalysts for PEMFCs. Importantly, the rGO/TiO2hollow nanospheres display excellent electrochemical stability under high potential cycling (1.2–1.7 V) compared with conventional carbon black (CB) support materials that normally induce electrochemical corrosion during fuel cell operation. The Pt/rGO/TiO2is tested to establish its catalytic activity and stability using accelerated durability testing that mimics the conditions and degradation modes encountered during long‐term fuel cell operation. The Pt/rGO/TiO2cathode catalyst demonstrates comparable catalytic activity toward oxygen reduction and exhibits much higher stability than the Pt/CB one at high potentials in terms of minimal loss of the Pt electrochemical surface area. More importantly, Pt/rGO/TiO2displays a negligible voltage drop over long‐term cycling during practical fuel cell operation. The high stability of the Pt/rGO/TiO2electrocatalyst synthesized in this investigation offers a new approach to improve the reliability and durability of PEMFC cathode catalysts.

    Abstract :

    The carbon‐coated Ti 3+ self‐doped TiO2‐reduced graphene oxide hollow spheresas a novel platinum support exhibit comparable oxygen reduction activity and excellent electrochemical stability under high potential cycling compared with conventional carbon black support materials.


  • Identifier: System Number: LDEAvdc_100054096569.0x000001; Journal ISSN: 2196-7350; 10.1002/admi.201700564
  • Publication Date: 2017
  • Physical Description: Electronic
  • Shelfmark(s): ELD Digital store

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