Superior Catalysts for Oxygen Reduction Reaction Based on Porous Nanostars of a Pt, Pd, or Pt–Pd Alloy Shell Supported on a Gold Core | Zendy

Venarusso Luna B. | Zendy; Bettini Jefferson | Zendy; Maia Gilberto | Zendy

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Superior Catalysts for Oxygen Reduction Reaction Based on Porous Nanostars of a Pt, Pd, or Pt–Pd Alloy Shell Supported on a Gold Core

Author(s) -

Venarusso Luna B.,

Bettini Jefferson,

Maia Gilberto

Publication year - 2016

Publication title -

chemelectrochem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 59

ISSN - 2196-0216

DOI - 10.1002/celc.201600046

Subject(s) - alloy , catalysis , oxygen reduction reaction , materials science , porosity , homogeneous , chemical engineering , shell (structure) , specific surface area , chemistry , metallurgy , composite material , electrochemistry , organic chemistry , electrode , thermodynamics , physics , engineering

The aims of this study are to synthesize porous nanostars (PNSs) composed of a Pt, Pd, or Pt–Pd alloy shell supported on a gold core and to demonstrate their improved electrocatalytic activity towards the oxygen reduction reaction (ORR). The catalysts contain homogeneous, porous, star‐shaped, large‐sized structures (50 or 20 nm on average), with a covering pattern of Pt or Pt–Pd alloy nanodendritic particles of up to 5 nm. The synthesized PNS catalysts catalyze the ORR effectively, offering high performance in terms of Pt group metals mass‐specific activity, electrochemically active surface area ( ECSA ), specific ECSA , and specific activity, with high half‐wave potential values (0.93–0.96 V).

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