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Title: Ultrathin High Surface Area Nickel Boride (Ni x B) Nanosheets as Highly Efficient Electrocatalyst for Oxygen Evolution

Journal Article · · Advanced Energy Materials
 [1];  [2];  [3];  [1];  [4];  [5];  [6];  [2]; ORCiD logo [1]
  1. Analytical Chemistry—Center for Electrochemical Sciences (CES) Ruhr Universität Bochum D‐44780 Bochum Germany
  2. Department of Physics Ruhr‐University Bochum D‐44801 Bochum Germany
  3. Department of Physics Ruhr‐University Bochum D‐44801 Bochum Germany, Department of Physics University of Central Florida Orlando FL 32816 USA
  4. Catalan Institute of Nanoscience and Nanotechnology (ICN2) CSIC, and The Barcelona Institute of Science and Technology (BIST) Campus UAB, Bellaterra 08193 Barcelona Catalonia Spain
  5. Catalan Institute of Nanoscience and Nanotechnology (ICN2) CSIC, and The Barcelona Institute of Science and Technology (BIST) Campus UAB, Bellaterra 08193 Barcelona Catalonia Spain, ICREA Pg. Lluís Companys 23 08010 Barcelona Catalonia Spain
  6. Laboratory of Industrial Chemistry Ruhr‐University Bochum D‐44801 Bochum Germany

The overriding obstacle to mass production of hydrogen from water as the premium fuel for powering our planet is the frustratingly slow kinetics of the oxygen evolution reaction (OER). Additionally, inadequate understanding of the key barriers of the OER is a hindrance to insightful design of advanced OER catalysts. This study presents ultrathin amorphous high‐surface area nickel boride (Ni x B) nanosheets as a low‐cost, very efficient and stable catalyst for the OER for electrochemical water splitting. The catalyst affords 10 mA cm −2 at 0.38 V overpotential during OER in 1.0 m KOH, reducing to only 0.28 V at 20 mA cm −2 when supported on nickel foam, which ranks it among the best reported nonprecious catalysts for oxygen evolution. Operando X‐ray absorption fine‐structure spectroscopy measurements reveal prevalence of NiOOH, as well as Ni‐B under OER conditions, owing to a Ni‐B core@nickel oxyhydroxide shell (Ni‐B@NiO x H) structure, and increase in disorder of the NiO x H layer, thus revealing important insight into the transient states of the catalyst during oxygen evolution.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐AC02‐76SF00515
OSTI ID:
1378804
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Vol. 7 Journal Issue: 17; ISSN 1614-6832
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 293 works
Citation information provided by
Web of Science

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