Amorphous Cobalt Phyllosilicate with Layered Crystalline Motifs as Water Oxidation Catalyst

© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 29(2017), 21 vom: 07. Juni
1. Verfasser: Kim, Ju Seong (VerfasserIn)
Weitere Verfasser: Park, Inchul, Jeong, Eun-Suk, Jin, Kyoungsuk, Seong, Won Mo, Yoon, Gabin, Kim, Hyunah, Kim, Byunghoon, Nam, Ki Tae, Kang, Kisuk
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article electrocatalyst layered (oxy)hydroxides oxygen evolution reaction phyllosilicate water splitting
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520 |a The development of a high-performance oxygen evolution reaction (OER) catalyst is pivotal for the practical realization of a water-splitting system. Although an extensive search for OER catalysts has been performed in the past decades, cost-effective catalysts remain elusive. Herein, an amorphous cobalt phyllosilicate (ACP) with layered crystalline motif prepared by a room-temperature precipitation is introduced as a new OER catalyst; this material exhibits a remarkably low overpotential (η ≈ 367 mV for a current density of 10 mA cm-2 ). A structural investigation using X-ray absorption spectroscopy reveals that the amorphous structure contains layered motifs similar to the structure of CoOOH, which is demonstrated to be responsible for the OER catalysis based on density functional theory calculations. However, the calculations also reveal that the local environment of the active site in the layered crystalline motif in the ACP is significantly modulated by the silicate, leading to a substantial reduction of η of the OER compared with that of CoOOH. This work proposes amorphous phyllosilicates as a new group of efficient OER catalysts and suggests that tuning of the catalytic activity by introducing redox-inert groups may be a new unexplored avenue for the design of novel high-performance catalysts 
650 4 |a Journal Article 
650 4 |a electrocatalyst 
650 4 |a layered (oxy)hydroxides 
650 4 |a oxygen evolution reaction 
650 4 |a phyllosilicate 
650 4 |a water splitting 
700 1 |a Park, Inchul  |e verfasserin  |4 aut 
700 1 |a Jeong, Eun-Suk  |e verfasserin  |4 aut 
700 1 |a Jin, Kyoungsuk  |e verfasserin  |4 aut 
700 1 |a Seong, Won Mo  |e verfasserin  |4 aut 
700 1 |a Yoon, Gabin  |e verfasserin  |4 aut 
700 1 |a Kim, Hyunah  |e verfasserin  |4 aut 
700 1 |a Kim, Byunghoon  |e verfasserin  |4 aut 
700 1 |a Nam, Ki Tae  |e verfasserin  |4 aut 
700 1 |a Kang, Kisuk  |e verfasserin  |4 aut 
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773 1 8 |g volume:29  |g year:2017  |g number:21  |g day:07  |g month:06 
856 4 0 |u http://dx.doi.org/10.1002/adma.201606893  |3 Volltext 
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