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Title: Zirconium‐Regulation‐Induced Bifunctionality in 3D Cobalt–Iron Oxide Nanosheets for Overall Water Splitting

Journal Article · · Advanced Materials
 [1];  [2];  [3];  [4];  [1];  [1];  [4];  [3]; ORCiD logo [5]
  1. State Key Laboratory of Chem/Bio‐Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and Devices College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
  2. State Key Laboratory of Chem/Bio‐Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and Devices College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China, College of Materials Science and Engineering Qingdao University of Science and Technology Qingdao Shandong 266042 P. R. China
  3. College of Chemistry and Materials Science Nanjing Normal University Nanjing Jiangsu 210023 P. R. China
  4. Department of Physics Tamkang University 151 Yingzhuan Rd. New Taipei City 25137 Taiwan
  5. State Key Laboratory of Chem/Bio‐Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and Devices College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China, Shenzhen Research Institute of Hunan University Shenzhen 518057 P. R. China
+ Show Author Affiliations

Abstract The design of high‐efficiency non‐noble bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is paramount for water splitting technologies and associated renewable energy systems. Spinel‐structured oxides with rich redox properties can serve as alternative low‐cost OER electrocatalysts but with poor HER performance. Here, zirconium regulation in 3D CoFe 2 O 4 (CoFeZr oxides) nanosheets on nickel foam, as a novel strategy inducing bifunctionality toward OER and HER for overall water splitting, is reported. It is found that the incorporation of Zr into CoFe 2 O 4 can tune the nanosheet morphology and electronic structure around the Co and Fe sites for optimizing adsorption energies, thus effectively enhancing the intrinsic activity of active sites. The as‐synthesized 3D CoFeZr oxide nanosheet exhibits high OER activity with small overpotential, low Tafel slope, and good stability. Moreover, it shows unprecedented HER activity with a small overpotential of 104 mV at 10 mA cm −2 in alkaline media, which is better than ever reported counterparts. When employing the CoFeZr oxides nanosheets as both anode and cathode catalysts for overall water splitting, a current density of 10 mA cm −2 is achieved at the cell voltage of 1.63 V in 1.0 m KOH.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐SC0012704
OSTI ID:
1523675
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Vol. 31 Journal Issue: 28; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 275 works
Citation information provided by
Web of Science

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