Journal
CHEMELECTROCHEM
Volume 6, Issue 5, Pages 1520-1524Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201801775
Keywords
perovskite oxides; electrocatalysts; overall water splitting; composites; sulfuration
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Funding
- National Natural Science Foundation of China [21706132]
- Natural Science Foundation of Jiangsu Province [BK20160834]
- Startup Foundation for Introducing Talent of NUIST
- Mid-Career Researcher Program through the National Research Foundation of Korea [NRF-2015R1A2A1A10055886]
- Ministry of Science, ICT and Future Planning
- UNIST [1.170002.01]
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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 insitu 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 (Nd0.6Sr0.4)(3)((Co,Fe)(0.85)Nb-0.15)(2)O-7, metal sulfides, and hollow S-doped carbon fibers. Compared to the untreated catalyst, Nd0.6Sr0.4Co0.6Fe0.3Nb0.1O3-delta, 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.
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