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Research Article

Phosphorus oxoanion-intercalated layered double hydroxides for high-performance oxygen evolution

Ma Luo1,§Zhao Cai1,2,§Cheng Wang3Yongmin Bi1Li Qian1Yongchao Hao1Li Li1Yun Kuang1Yaping Li1Xiaodong Lei1Ziyang Huo4Wen Liu2( )Hailiang Wang2Xiaoming Sun1( )Xue Duan1
State Key Laboratory of Chemical Resource Engineering, College of Energy Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029 China
Department of Chemistry and Energy Sciences Institute Yale University810 West Campus DriveWest Haven, CT 06516 USA
Chinese Research Academy of Environmental Sciences Beijing 100012 China
Queensland Micro- and Nanotechnology Centre Griffith UniversityBrisbane QLD4109 Australia

§ These authors contributed equally to this work.

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Abstract

Rational design and controlled fabrication of efficient and cost-effective electrodes for the oxygen evolution reaction (OER) are critical for addressing the unprecedented energy crisis. Nickel–iron layered double hydroxides (NiFe-LDHs) with specific interlayer anions (i.e. phosphate, phosphite, and hypophosphite) were fabricated by a co-precipitation method and investigated as oxygen evolution electrocatalysts. Intercalation of the phosphorus oxoanion enhanced the OER activity in an alkaline solution; the optimal performance (i.e., a low onset potential of 215 mV, a small Tafel slope of 37.7 mV/dec, and stable electrochemical behavior) was achieved with the hypophosphite-intercalated NiFe-LDH catalyst, demonstrating dramatic enhancement over the traditional carbonate-intercalated NiFe-LDH in terms of activity and durability. This enhanced performance is attributed to the interaction between the intercalated phosphorous oxoanions and the edge-sharing MO6 (M = Ni, Fe) layers, which modifies the surface electronic structure of the Ni sites. This concept should be inspiring for the design of more effective LDH-based oxygen evolution electrocatalysts.

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Nano Research
Pages 1732-1739
Cite this article:
Luo M, Cai Z, Wang C, et al. Phosphorus oxoanion-intercalated layered double hydroxides for high-performance oxygen evolution. Nano Research, 2017, 10(5): 1732-1739. https://doi.org/10.1007/s12274-017-1437-2
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Received: 09 October 2016
Revised: 23 December 2016
Accepted: 26 December 2016
Published: 22 February 2017
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2017
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