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Electron Redistributed S-Doped Nickel Iron Phosphides Derived from One-Step Phosphatization of MOFs for Significantly Boosting Electrochemical Water Splitting

Journal Article · · Advanced Functional Materials
 [1];  [2];  [2];  [3];  [3];  [3];  [2];  [2];  [2];  [4];  [5];  [3]
  1. China University of Petroleum, Beijing (China); University of California, Riverside, CA (United States); OSTI
  2. China University of Petroleum, Beijing (China)
  3. University of California, Riverside, CA (United States)
  4. Swinburne University of Technology, Hawthorn, VIC (Australia); RMIT University, Melbourn, VIC (Australia)
  5. California State University (CalState), Long Beach, CA (United States)
Nonprecious transition metal-organic frameworks (MOFs) are one of the most promising precursors for developing electrocatalysts with high porosity and structural rigidity. This study reports the synthesis of high efficiency electrocatalysts based on S-doped NiFeP. MOF-derived S-doped NiFeP structure is synthesized by a one-step phosphorization process with using S-doped MOFs as the precursor, which is more convenient and environment friendly, and also helps retain the samples’ framework. The oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance of the NiFeP catalysts can be improved after partially replacing P by S due to the tunable electronic structure. The optimized CCS-NiFeP-10 reaches a current density of 10 mA cm–2 for OER with an overpotential of 201 mV and outperforms most NiFe-based catalysts. The S doping plays an important role in tuning the ΔG values for intermediates formation in Ni atoms to a suitable value and exhibits a pronouncedly improved the OER performance. CCS-NiFeP-20 sample presents excellent HER performance due to the d-band center downshifting from the Fermi level. When the voltage of the electrolytic cell is 1.50 V, a current density of 10 mA cm–2 can be obtained. This strategy paves the way for designing highly active none-noble metal catalysts.
Research Organization:
Univ. of California, Riverside, CA (United States); University of California, Riverside, CA (United States)
Sponsoring Organization:
Australian Research Council; Australian Research Council (ARC); China Scholarship Council (CSC); Discovery Project; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Victorian Government
Grant/Contract Number:
SC0010596
OSTI ID:
1976188
Alternate ID(s):
OSTI ID: 2205474
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 23 Vol. 32; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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