Abstract
In this paper, a new environmentally-friendly anode for hydrogen production was developed based on 430 stainless steel with an electrodeposited cobalt layer. The novelty of this work is the cobalt source once the electrodeposition bath was obtained from acid dissolution of a spent Li-ion battery cathode. The oxygen evolution reaction on electrodeposited cobalt in 1 M KOH is compatible with the E. Kobussen mechanism. The water discharge is related with reaction determinant step in low overpotential. The cobalt electrodeposition (3 Ccm−2) promotes a significant improvement of 430 stainless steel anodic properties for oxygen evolution reaction. When the overpotential reaches 370 mV, the density current for 430 stainless steel with electrodeposit cobalt is 19 mA·cm−2 against 0.80 mA·cm−2 for 430 stainless steel without cobalt. Thus, the anode construction described in this paper is an excellent option for Li-ion battery recycling.
Highlights
Renewable energy source such as hydrogen is considered crucial for a more sustainable future [1].since daily processes even space exploration will depend, largely of hydrogen production within few years [2]
Considering the pH used in this study, the presence of other proposes that the mechanism involves the formation of Co(OH)2 and the subsequent reduction of cobalt phases, such as Co(OH)2, in the cobalt electrodeposit was not expected [20]
Considering the pH used in this study, the presence of Figure 2 shows the scanning electron microscopy (SEM) of electrodeposited cobalt
Summary
Renewable energy source such as hydrogen is considered crucial for a more sustainable future [1].since daily processes even space exploration will depend, largely of hydrogen production within few years [2]. H2 with O2 molecules (forward direction in Equation (1)) has only water molecules as a sub-product, beyond high molar enthalpy value (∆H = 285.8 kJ/mol at 1013 mbar and 298 K) [2]. In this context, the water electrolysis is the most attractive route among the existed processes for very pure hydrogen production (and O2 ) in large scale (inverse direction in Equation (1)) [1]. The RuO2 and IrO2 are suggested as the benchmark for OER in alkaline solution [8] These oxides have a prohibitive cost for large scale application [8]. This shows that a Recycling 2018, 3, 42; doi:10.3390/recycling3030042 www.mdpi.com/journal/recycling
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
