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Implementation of Proton Exchange Membrane Water Electrolyzer with Ultralow Pt Loading Cathode through Pt Particle Size Control

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Title
Implementation of Proton Exchange Membrane Water Electrolyzer with Ultralow Pt Loading Cathode through Pt Particle Size Control
Author(s)
Song, Jihyeok; Kim, Youngkwang; Jongmin Lee; Kim, Hyun-Jong; Yung-Eun Sung; Lim, Taeho; Kwon, Oh Joong
Publication Date
2023-10
Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v.11, no.45, pp.16258 - 16266
Publisher
AMER CHEMICAL SOC
Abstract
Proton exchange membrane water electrolysis is a promising technology for hydrogen production. However, the high-cost catalyst material used in the cathode, particularly Pt, remains a challenge for its commercialization. Therefore, efforts are being made to develop alternative transition-metal or Pt-based alloy catalysts with a reduced Pt loading. In this study, we synthesized Pt catalysts using a Pt-aniline complex and a carbon nanofiber support and controlled the relative abundance of Pt particles according to three defined size categories: particles smaller than 1 nm, particles between 1 and 2 nm, and particles larger than 2 nm. The activity and stability of these catalysts were evaluated in the half- and unit-cell stages. The Pt catalyst, mainly composed of Pt nanoclusters with sizes of 1-2 nm, exhibited high activity and stability. In a unit-cell evaluation, it demonstrated a cell voltage of 1.71 V at 1 A cm(-2) with a Pt loading of only 0.015 mg(Pt) cm(-2), indicating its potential as an ultralow Pt-loading proton exchange membrane water electrolyzer.
URI
https://pr.ibs.re.kr/handle/8788114/14413
DOI
10.1021/acssuschemeng.3c04679
ISSN
2168-0485
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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