Ni-Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis
- Authors
- Yun, Woo Hyun; Das, Gautam; Kim, Bohyeon; Park, Bang Ju; Yoon, Hyon Hee; Yoon, Young Soo
- Issue Date
- Nov-2021
- Publisher
- Nature Research
- Citation
- Scientific Reports, v.11, no.1
- Journal Title
- Scientific Reports
- Volume
- 11
- Number
- 1
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/82947
- DOI
- 10.1038/s41598-021-01383-3
- ISSN
- 2045-2322
- Abstract
- A free-standing catalyst electrode for the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) in a urea electrolysis cell was synthesized by electroplating a Ni–Fe alloy onto carbon felt, followed by phosphidation (P-NiFe@CF). The prepared P-NiFe@CF catalyst consisted of Ni5P4, NiP2, and FeP with 3D flower-like P-NiFe architecture on CF. P-NiFe@CF exhibited excellent electrocatalytic activity for the UOR (demanding only 1.39 V (vs. RHE) to achieve 200 mA cm−2), and for the HER with a low overpotential of 0.023 V (vs. RHE) at 10 mA cm−2, indicating its feasibility as a bifunctional catalyst electrode for urea electrolysis. A urea electrolysis cell with P-NiFe@CF as both the free-standing anode and cathode generated a current density of 10 mA cm−2 at a cell potential of 1.37 V (vs. RHE), which is considerably lower than that of water electrolysis, and also lower than previously reported values. The results indicate that the P-NiFe@CF catalyst electrodes can be used as free-standing bifunctional electrodes for urea electrolyzers. © 2021, The Author(s).
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Collections - 공과대학 > 신소재공학과 > 1. Journal Articles
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- IT융합대학 > 전자공학과 > 1. Journal Articles
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