Ni-Fe phosphide deposited carbon felt as free-standing bifunctional catalyst electrode for urea electrolysis.

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 cu

SUBMITTER: Yun WH 

PROVIDER: S-EPMC8578333 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature