Highly efficient oxygen evolution reaction via facile bubble transport realized by three-dimensionally stack-printed catalysts

Ye Ji Kim, Ahyoun Lim, Jong Min Kim, Donghoon Lim, Keun Hwa Chae, Eugene N. Cho, Hyeuk Jin Han, Ki Ung Jeon, Moohyun Kim, Gun Ho Lee, Gyu Rac Lee, Hyun S. Ahn, Hyun S. Park, Hyoungsoo Kim, Jin Young Kim () and Yeon Sik Jung ()
Additional contact information
Ye Ji Kim: Korea Advanced Institute of Science and Technology (KAIST)
Ahyoun Lim: Center for Hydrogen & Fuel Cell Research, Korea Institute of Science and Technology (KIST)
Jong Min Kim: Materials Architecturing Research Center, Korea Institute of Science and Technology (KIST)
Donghoon Lim: Yonsei University
Keun Hwa Chae: Advanced Analysis Center, Korea Institute of Science and Technology (KIST)
Eugene N. Cho: Korea Advanced Institute of Science and Technology (KAIST)
Hyeuk Jin Han: Korea Advanced Institute of Science and Technology (KAIST)
Ki Ung Jeon: Korea Advanced Institute of Science and Technology (KAIST)
Moohyun Kim: Korea Advanced Institute of Science and Technology (KAIST)
Gun Ho Lee: Korea Advanced Institute of Science and Technology (KAIST)
Gyu Rac Lee: Korea Advanced Institute of Science and Technology (KAIST)
Hyun S. Ahn: Yonsei University
Hyun S. Park: Center for Hydrogen & Fuel Cell Research, Korea Institute of Science and Technology (KIST)
Hyoungsoo Kim: Korea Advanced Institute of Science and Technology (KAIST)
Jin Young Kim: Center for Hydrogen & Fuel Cell Research, Korea Institute of Science and Technology (KIST)
Yeon Sik Jung: Korea Advanced Institute of Science and Technology (KAIST)

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract Despite highly promising characteristics of three-dimensionally (3D) nanostructured catalysts for the oxygen evolution reaction (OER) in polymer electrolyte membrane water electrolyzers (PEMWEs), universal design rules for maximizing their performance have not been explored. Here we show that woodpile (WP)-structured Ir, consisting of 3D-printed, highly-ordered Ir nanowire building blocks, improve OER mass activity markedly. The WP structure secures the electrochemically active surface area (ECSA) through enhanced utilization efficiency of the extended surface area of 3D WP catalysts. Moreover, systematic control of the 3D geometry combined with theoretical calculations and various electrochemical analyses reveals that facile transport of evolved O2 gas bubbles is an important contributor to the improved ECSA-specific activity. The 3D nanostructuring-based improvement of ECSA and ECSA-specific activity enables our well-controlled geometry to afford a 30-fold higher mass activity of the OER catalyst when used in a single-cell PEMWE than conventional nanoparticle-based catalysts.

Date: 2020
References: Add references at CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.nature.com/articles/s41467-020-18686-0 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18686-0

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-020-18686-0

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().