Platinum dissolution in nitrogen oxides-containing HClO4 solution studied by electrochemical quartz crystal microbalance

H. Kuroe, T. Morita, Y. Uchiyama, T. Abe, Shinichiro Imabayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

Platinum (Pt) dissolution has been elucidated by measuring a mass loss of Pt black-deposited Au quartz resonators in 0.1 mol dm-3 HClO 4 containing NaNO2. A continuous weight loss of ca. 50 ng cm-2 cycle-1 was detected at [NaNO2] = 0.01 mol dm-3 under the potential cycling between 0.6 and 1.4 V vs. RHE. The magnitude of Pt dissolution depends on the concentration of NaNO2 and the range of potential cycling. The average mass loss decreases to 5∼10 ng cm-2 cycle-1 at [NaNO2] = 1 mmol dm -3. The Pt dissolution occurs when the higher potential limit is more than 1.0 V vs. RHE and the lower potential limit is less than 0.9 V vs. RHE, suggesting that the reduction of Pt oxide in the presence of NaNO2 in the bulk solution contributes to the dissolution.

Original languageEnglish
Title of host publicationECS Transactions
Pages1607-1612
Number of pages6
Volume50
Edition2
DOIs
Publication statusPublished - 2012
Event12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting - Honolulu, HI
Duration: 2012 Oct 72012 Oct 12

Other

Other12th Polymer Electrolyte Fuel Cell Symposium, PEFC 2012 - 222nd ECS Meeting
CityHonolulu, HI
Period12/10/712/10/12

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ASJC Scopus subject areas

  • Engineering(all)

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