RuO2 nanocluster as a 4-in-1 electrocatalyst for hydrogen and oxygen electrochemistry

Han Saem Park, Juchan Yang, Min Kyung Cho, Yeongdae Lee, Seonghun Cho, Sung Dae Yim, Byeong Su Kim, Jong Hyun Jang, Hyun Kon Song

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Partially hydrous RuO2 nanocluster embedded in a carbon matrix (x-RuO2@C with x = hydration degree = 0.27 or 0.27@C) is presented as a bifunctional catalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for water splitting. Symmetric water electrolyzers based on 0.27-RuO2@C for both electrodes showed smaller potential gaps between HER and OER at pH 0, pH 14 and even pH 7 than conventional asymmetric electrolyzers based on two different catalysts (Pt/C || Ir/C) that have been known as the best catalysts for HER and OER respectively. Moreover, 0.27-RuO2@C showed another bifunctional electroactivity for fuel cell electrochemistry involving hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) that are the backward reactions of HER and OER respectively. Pt-level HOR electroactivity was obtained from 0.27-RuO2@C, while its ORR activity was inferior to that of Pt with 200 mV higher overpotential required. The tetra-functionality of 0.27-RuO2@C showed the possibility of realizing single-catalyst regenerative fuel cells.

Original languageEnglish
Pages (from-to)49-58
Number of pages10
JournalNano Energy
Volume55
DOIs
Publication statusPublished - 2019 Jan

Fingerprint

Electrocatalysts
Nanoclusters
Electrochemistry
Hydrogen
Oxygen
Catalysts
Regenerative fuel cells
Oxidation
Water
Hydration
Fuel cells
Carbon
Electrodes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Park, H. S., Yang, J., Cho, M. K., Lee, Y., Cho, S., Yim, S. D., ... Song, H. K. (2019). RuO2 nanocluster as a 4-in-1 electrocatalyst for hydrogen and oxygen electrochemistry. Nano Energy, 55, 49-58. https://doi.org/10.1016/j.nanoen.2018.10.017
Park, Han Saem ; Yang, Juchan ; Cho, Min Kyung ; Lee, Yeongdae ; Cho, Seonghun ; Yim, Sung Dae ; Kim, Byeong Su ; Jang, Jong Hyun ; Song, Hyun Kon. / RuO2 nanocluster as a 4-in-1 electrocatalyst for hydrogen and oxygen electrochemistry. In: Nano Energy. 2019 ; Vol. 55. pp. 49-58.
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Park, HS, Yang, J, Cho, MK, Lee, Y, Cho, S, Yim, SD, Kim, BS, Jang, JH & Song, HK 2019, 'RuO2 nanocluster as a 4-in-1 electrocatalyst for hydrogen and oxygen electrochemistry', Nano Energy, vol. 55, pp. 49-58. https://doi.org/10.1016/j.nanoen.2018.10.017

RuO2 nanocluster as a 4-in-1 electrocatalyst for hydrogen and oxygen electrochemistry. / Park, Han Saem; Yang, Juchan; Cho, Min Kyung; Lee, Yeongdae; Cho, Seonghun; Yim, Sung Dae; Kim, Byeong Su; Jang, Jong Hyun; Song, Hyun Kon.

In: Nano Energy, Vol. 55, 01.2019, p. 49-58.

Research output: Contribution to journalArticle

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AU - Park, Han Saem

AU - Yang, Juchan

AU - Cho, Min Kyung

AU - Lee, Yeongdae

AU - Cho, Seonghun

AU - Yim, Sung Dae

AU - Kim, Byeong Su

AU - Jang, Jong Hyun

AU - Song, Hyun Kon

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N2 - Partially hydrous RuO2 nanocluster embedded in a carbon matrix (x-RuO2@C with x = hydration degree = 0.27 or 0.27@C) is presented as a bifunctional catalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for water splitting. Symmetric water electrolyzers based on 0.27-RuO2@C for both electrodes showed smaller potential gaps between HER and OER at pH 0, pH 14 and even pH 7 than conventional asymmetric electrolyzers based on two different catalysts (Pt/C || Ir/C) that have been known as the best catalysts for HER and OER respectively. Moreover, 0.27-RuO2@C showed another bifunctional electroactivity for fuel cell electrochemistry involving hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) that are the backward reactions of HER and OER respectively. Pt-level HOR electroactivity was obtained from 0.27-RuO2@C, while its ORR activity was inferior to that of Pt with 200 mV higher overpotential required. The tetra-functionality of 0.27-RuO2@C showed the possibility of realizing single-catalyst regenerative fuel cells.

AB - Partially hydrous RuO2 nanocluster embedded in a carbon matrix (x-RuO2@C with x = hydration degree = 0.27 or 0.27@C) is presented as a bifunctional catalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for water splitting. Symmetric water electrolyzers based on 0.27-RuO2@C for both electrodes showed smaller potential gaps between HER and OER at pH 0, pH 14 and even pH 7 than conventional asymmetric electrolyzers based on two different catalysts (Pt/C || Ir/C) that have been known as the best catalysts for HER and OER respectively. Moreover, 0.27-RuO2@C showed another bifunctional electroactivity for fuel cell electrochemistry involving hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) that are the backward reactions of HER and OER respectively. Pt-level HOR electroactivity was obtained from 0.27-RuO2@C, while its ORR activity was inferior to that of Pt with 200 mV higher overpotential required. The tetra-functionality of 0.27-RuO2@C showed the possibility of realizing single-catalyst regenerative fuel cells.

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