Dual-Site Catalysis of Fe-Incorporated Oxychlorides as Oxygen Evolution Electrocatalysts

Dual-Site Catalysis of Fe-Incorporated Oxychlorides as Oxygen Evolution Electrocatalysts

Electrocatalysts with high activity for the oxygen evolution reaction (OER) play a pivotal role in various electrochemical devices such as water electrolyzers and metal–air batteries. Electronic interactions between these catalysts and chemical reactants control the activity and efficiency and hence...

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Veröffentlicht in:Chemistry of materials 2020-10, Vol.32 (19), p.8195-8202
Hauptverfasser: Miyahara, Yuto, Fukutsuka, Tomokazu, Abe, Takeshi, Miyazaki, Kohei
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container_end_page 8202
container_issue 19
container_start_page 8195
container_title Chemistry of materials
container_volume 32
creator Miyahara, Yuto
Fukutsuka, Tomokazu
Abe, Takeshi
Miyazaki, Kohei
description Electrocatalysts with high activity for the oxygen evolution reaction (OER) play a pivotal role in various electrochemical devices such as water electrolyzers and metal–air batteries. Electronic interactions between these catalysts and chemical reactants control the activity and efficiency and hence need to be optimized, but only the cation components have been of interest. Here, through the optimization of both the cation and anion components, we demonstrate that a Ruddlesden–Popper-type oxychloride Sr2Co0.8Fe0.2O3Cl successfully outperforms Ba0.5Sr0.5Co0.8Fe0.2O3−δ, which is a well-known highly active OER catalyst. Moreover, Sr2Co0.8Fe0.2O3Cl also catalyzes the oxygen reduction reaction (ORR) and minimizes the overpotentials of both the ORR and OER, compared with previously reported conventional perovskite-type catalysts. We discuss possible descriptors of the catalytic activity of Sr2Co1–x Fe x O3Cl to clarify the origin of its activity and highlight a new reaction pathway for OER that involves catalysis by both Co and Fe.
doi_str_mv 10.1021/acs.chemmater.0c01674
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title Dual-Site Catalysis of Fe-Incorporated Oxychlorides as Oxygen Evolution Electrocatalysts
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