Hybrid architecture of rhodium oxide nanofibers and ruthenium oxide nanowires for electrocatalysts

Yu Lim Kim, Yejin Ha, Nam Suk Lee, Joo Gon Kim, Jeong Min Baik, Chongmok Lee, Kyunghwan Yoon, Youngmi Lee, Myung Hwa Kim

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We report the synthesis and electrochemical performances of the hybrid architecture of rhodium oxide (Rh2O3) nanofibers (NF) and highly single crystalline RuO2 nanowires (NW) by combining the electrospinning process and a simple recrystallization process. The amorphous Ru(OH)3·xH2O precursors at relatively low temperature were efficiently transformed into highly single crystalline RuO2 nanowires with the tetragonal rutile structure on electrospun Rh2O3 nanofibers. Pure Rh2O3 NF and hybrid RuO2 NW-Rh2O3 NF exhibited different electroactivities toward H2O2 electrochemical reaction: Rh2O3 NF facilitates the H2O2 oxidation vs. hybrid RuO2 NW-Rh2O3 NF promotes H2O2 reduction more favorably. The H2O2 reduction free from O2 reduction interference at RuO2 NW-Rh2O3 NF is advantageous and finds the feasibility for selective H2O2 detection in various samples. Furthermore, RuO2 NW-Rh2O3 NF generated a greatly higher current induced by H2O2 reduction (i.e., enhanced sensitivity to H2O2) than bare Rh2O3 NF.

Original languageEnglish
Pages (from-to)574-580
Number of pages7
JournalJournal of Alloys and Compounds
Volume663
DOIs
StatePublished - 5 Apr 2016

Bibliographical note

Funding Information:
This work was financially supported by the DGIST R&D Program of the Ministry of Science, ICT and Future Planning of Korea ( 14-BD-01 ); the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning ( 2014R1A2A2A05003769 for YL); and the National Research Foundation of Korea (NRF) funded the Korean Government ( 2014R1A1A2059791 ) for MHK.

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

Keywords

  • Electrocatalyst
  • Nanofiber
  • Nanowire
  • Rhodium oxide
  • Ruthenium oxide

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