Synthesis of Nanoporous Au-Cu-Pt Alloy as a Superior Catalyst for the Methanol Oxidation Reaction

Xie, Yunxiang; Li, Can; Razek, Sara A.; Fang, Jiye; Dimitrov, Nikolay

doi:10.1002/celc.201901932

Synthesis of Nanoporous Au-Cu-Pt Alloy as a Superior Catalyst for the Methanol Oxidation Reaction

Journal Article · Fri Jan 10 00:00:00 EST 2020 · ChemElectroChem

DOI:https://doi.org/10.1002/celc.201901932· OSTI ID:1767528

Xie, Yunxiang ^[1]; Li, Can ^[2]; Razek, Sara A. ^[2]; Fang, Jiye ^[2]; Dimitrov, Nikolay ^[2]

State Univ. of New York (SUNY), Binghamton, NY (United States); OSTI
State Univ. of New York (SUNY), Binghamton, NY (United States)

A nanoporous (np) Au-Cu-Pt thin-film catalyst with a fine structure and tunable composition is synthesized by using a facile method involving successive electrodeposition and de-alloying. The structure, electronic state, elemental content, and active surface area of the catalyst, along with the Pt fraction, are characterized and/or determined before and after the methanol oxidation reaction (MOR) tests through electrochemical and ultrahigh vacuum analytical routines. The prepared np Au-Cu-(8% in the precursor alloy)Pt catalyst exhibits outstanding mass and specific activity toward the MOR, which is approximately six- and nine-times higher than the activity of a commercial Pt/C(40%) counterpart, respectively. A negative 75 mV onset potential shift upon the MOR anodic scan on the np Au-Cu-(8%)Pt catalyst in comparison with Pt/C(40%) corroborates its higher catalytic activity. Furthermore, the alloy catalyst demonstrates better durability than the Pt/C(40%) counterpart in a three-hour constant potential test and exhibits full post-factum recovery of its cycling activity. In addition, it retains more than 60% of its original activity after 3000 cycles of an accelerated degradation test. Overall, the outstanding performance is attributed to the specific catalyst's structure leading to a d-band upshift along with unique constituent interplay.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Alkaline-Based Energy Solutions (CABES)

Sponsoring Organization:: National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0019445

OSTI ID:: 1767528

Alternate ID(s):: OSTI ID: 1598746

Journal Information:: ChemElectroChem, Journal Name: ChemElectroChem Journal Issue: 2 Vol. 7; ISSN 2196-0216

Publisher:: ChemPubSoc EuropeCopyright Statement

Country of Publication:: United States

Language:: English

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Synthesis of Nanoporous Au-Cu-Pt Alloy as a Superior Catalyst for the Methanol Oxidation Reaction

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