New strategy to synthesize oxygen vacancy-rich CoFe nanoneedles for overall water splitting and urea electrolysis

Bimetallic Cu/Fe MOF-Based Nanosheet Film via Binder-Free Drop-Casting Route: A Highly Efficient Urea-Electrolysis Catalyst

“…Recently, the urea oxidation reaction (UOR) has attracted great attention in urea-based energy conversion technologies as it allows for the simultaneous production of hydrogen and the treatment of urea-rich wastewater [ 23 , 26 , 27 , 28 , 29 , 30 ]. Theoretically, the UOR needs a significantly lower thermodynamic potential of 0.37 V while the OER requires a minimum of 1.23 V. Hence, the UOR offers advantageous energy savings and elevation of energy efficiency in hydrogen generation via electrochemical water-splitting [ 31 , 32 , 33 ].…”

Interfacial engineering of a tri-phase CoFe/CoFeOx/Co–Fe3O4electrocatalyst for promoting the oxygen evolution reaction

“…3c), three characteristic peaks at 529.7 eV, 530.5 eV and 532.4 eV were divided into three categories, corresponding to the metal-oxygen bond, oxygen defects and the hydroxyl group. 34,35 The abovementioned XPS results manifested the fact that the dominated chemical states on the catalyst surface were composed of oxidized species and zero-valent metal, demonstrating the construction of the external amorphous oxide layer CoFeO x and the internal CoFe alloy core. To verify the electronic interaction between the interfaces in the tri-phase interfacial structure of CoFe/CoFeO x /Co-Fe 3 O 4 , we also collected the XPS core level spectra of Co 2p for Co/CoO x (1 : 0) and Fe 2p for Fe 3 O 4 (0 : 1).…”

Co2P decorated Co3O4 nanocomposites supported on carbon cloth with enhanced electrochemical performance for asymmetric supercapacitors

“…In the fitting circuit, R s , R ct , C dl , R W , and C F are the solution resistance, charge-transfer resistance, electrical double layer capacitance, Warburg resistivity, and faradaic pseudocapacitance. 42,43 Obviously, the smaller values of R s (intercept at the real axis) and R ct (diameter of semicircle) reflect the faster ions diffusion and charge transfer ability 44 Considering the application potential of Co 2 P@Co 3 O 4 nanocomposite electrode, an asymmetric SC was assembled with the Co 2 P@Co 3 O 4 nanocomposite electrode as the cathode and the PCC electrode as the anode, denoted as Co 2 P@Co 3 O 4 //PCC. Fig.…”

“…In the fitting circuit, R s , R ct , C dl , R W , and C F are the solution resistance, charge-transfer resistance, electrical double layer capacitance, Warburg resistivity, and faradaic pseudocapacitance 42,43. Obviously, the smaller values of R s (intercept at the real axis) and R ct (diameter of semicircle) reflect the faster ions diffusion and charge transfer ability44 of Co 2 P@Co 3 O 4 nanocomposites (8.9 O) compared with the pure Co 3 O 4 electrode (16.2 O), which is indeed benefitting from the high conductivity of Co 2 P.Considering the application potential of Co 2 P@Co 3 O 4 nanocomposite electrode, an asymmetric SC was assembled with the Co 2 P@Co 3 O 4 nanocomposite electrode as the cathode and the PCC electrode as the anode, denoted as Co 2 P@Co 3 O 4 //PCC. Fig.4shows the electrochemical properties of the PCC electrode.…”