Chinese Journal of Catalysis ›› 2023, Vol. 44: 127-138.DOI: 10.1016/S1872-2067(22)64190-1

• Articles • Previous Articles     Next Articles

Investigation of nickel iron layered double hydroxide for water oxidation in different pH electrolytes

Qixian Xiea, Dan Renb, Lichen Baic, Rile Ged, Wenhui Zhoud, Lu Baie, Wei Xiee, Junhu Wangd,*(), Michael Grätzelb, Jingshan Luoa,*()   

  1. aInstitute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300350, China
    bLaboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
    cLaboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
    dCenter for Advanced Mössbauer Spectroscopy, Mössbauer Effect Data Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
    eKey Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2022-06-13 Accepted:2022-08-04 Online:2023-01-18 Published:2022-12-08
  • Contact: Junhu Wang, Jingshan Luo
  • Supported by:
    National Key Research and Development Program of China(2019YFE0123400);National Key Research and Development Program of China(2018YFB1502003);Excellent Young Scholar Fund from the National Science Foundation of China(22122903);Tianjin Distinguished Young Scholar Fund(20JCJQJC00260);“111” Project(B16027);scholarship from the China Scholarship Council;Gebert Rüf Stiftung under Microbials scheme ‘Solar-Bio Fuels’(GRS-080/19);Early Postdoc Research Fellowship from the Swiss National Science Foundation(P2ELP2_199800);National Science Foundation of China(21961142006);International Partnership Program of Chinese Academy of Sciences(121421KYSB20170020)


Nickel iron layered double hydroxide (NiFe LDH) is one of the best oxygen evolution reaction (OER) catalysts in alkaline electrolytes. However, it performs poorly in neutral electrolytes, and the detailed mechanism is still unclear. Herein, we introduce electrochemical measurements, operando surface enhanced Raman spectroscopy and operando 57Fe Mössbauer spectroscopy to elucidate the mechanism of NiFe LDH for OER process in different pH electrolytes. Our results show that even though there exist Ni3+ and Fe4+ species, the NiFe LDH based electrocatalysts still show worse OER performance in neutral electrolytes than in alkaline conditions. Combining the electrochemical measurements with spectroscopic investigations, we demonstrated that the rate-determining step (RDS) of OER on NiFe LDH based electrocatalysts is from *O to *OOH in alkaline medium while *OH formation is the RDS in neutral conditions. Our work provides new insights into elucidating the OER mechanism in different pH electrolytes.

Key words: Nickel Iron layered double hydroxide, Oxygen evolution reaction, Operando surface enhanced Raman spectroscopy, Operando 57Fe M?ssbauer spectroscopy