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Kim, Guntae
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Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, PEMFC, metal-air batteries, Metal-CO2 system, Catalyst for DRM

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A Composite Catalyst Based on Perovskites for Overall Water Splitting in Alkaline Conditions

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Title
A Composite Catalyst Based on Perovskites for Overall Water Splitting in Alkaline Conditions
Author
Bu, YunfeiKim, SeonaKwon, OhhunZhong, QinKim, Guntae
Issue Date
2019-03
Publisher
Wiley-VCH Verlag
Citation
CHEMELECTROCHEM, v.6, no.5, pp.1520 - 1524
Abstract
Electrochemical water splitting is considered a sustainable way to produce H 2 . However, it is still a challenge to develop efficient and stable electrocatalysts. Here, a bifunctional composite catalyst for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) was constructed by using a facile in situ growth route, which combines the carbonization on exsolved alloy nanoparticles and sulfurization in one continues step. This composite catalyst contains Ruddlesden-Popper-type S-adsorbed (Nd 0.6 Sr 0.4 ) 3 ((Co,Fe) 0.85 Nb 0.15 ) 2 O 7 , metal sulfides, and hollow S-doped carbon fibers. Compared to the untreated catalyst, Nd 0.6 Sr 0.4 Co 0.6 Fe 0.3 Nb 0.1 O 3-δ , the composite catalyst leads to significantly enhanced OER and HER activities as well as excellent stability (more than 400 h without inactivation) during overall water splitting. Our research offers a new route to fabricate hetero-architecture materials with S-doped hollow carbon fibers on alloy nanoparticles of perovskite oxides.
URI
https://scholarworks.unist.ac.kr/handle/201301/30629
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/celc.201801775
DOI
10.1002/celc.201801775
ISSN
2196-0216
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