Synthesis of cobalt vanadium nanomaterials for efficient electrocatalysis of oxygen evolution

Shape‐Controlled First‐Row Transition Metal Vanadates for Electrochemical and Photoelectrochemical Water Splitting

“…The CoV morphology influence on EC‐OER was disclosed by Hao et al. [65] . They have developed three kinds of morphologies consisting of ultrafine nanosheets, ultrathin nanofilms, and ultrafine nanosheet‐comprised microspheres, respectively, and labeled them as Co 3 (VO 4 ) 2 ‐I, Co 3 (VO 4 ) 2 ‐II, and Co 3 (VO 4 ) 2 ‐III, respectively.…”

“…The ultrathin Co 3 V 2 O 8 films were fabricated by replacing water with DMF and ethanol solvents separately in the hydrothermal process (Figure 1a). [65] Similarly, the pseudo nanorods (NRs) shaped CoV 2 O 6 were fabricated by Mondal et al with a monoclinic phase having slightly curved endings by controlling the amount of ammonium sulphate. [31] The widely reported Na 5 V 12 O 32 NWs were used to accomplish CoV NWs hydrothermally.…”

“…[66] The synthesis of shape-controlled CuV also follows almost similar reaction pathways. For instance, the calculated amount of Cu(CO 2 CH 3 ) 2 and NH 4 VO 3 at a 2 : 1 mass ratio is mixed with Pluronic-123 (the amount being 10 times) and transferred to an autoclave for hydrothermal treatment at 120 °C for 12 h. The treated mixture was washed and annealed at different temperatures to acquire interlayered 2D morphology [65] Copyright 2018 Springer Nature. (b) SEM image of CoV NWs.…”

“…[31] The CoV morphology influence on EC-OER was disclosed by Hao et al. [65] They have developed three kinds of morphologies consisting of ultrafine nanosheets, ultrathin nanofilms, and ultrafine nanosheet-comprised microspheres, respectively, and labeled them as Co 3 (VO 4 ) 2 -I, Co 3 (VO 4 ) 2 -II, and Co 3 (VO 4 ) 2 -III, respectively. All the types exhibited the EC-OER characteristics, however, the ultrathin Co 3 (VO 4 ) 2 -II nanofilms showed the lowest onset potential of 310 mV and overpotential of 330 mV to drive a current density of 10 mA cm À 2 .…”

“…Figure 1. Layered (sheets) and NWs morphologies of various t-MVs: (a) CoV ultrafine TEM image of nanosheets [65]. Copyright 2018 Springer Nature.…”