Cobalt-Doped Iron Phosphate Crystal on Stainless Steel Mesh for Corrosion-Resistant Oxygen Evolution Catalyst

Abstract

We report an oxygen evolution reaction (OER) catalyst prepared by the incorporation of cobalt-doped iron phosphate on stainless steel mesh (SSM) through a one-step hydrothermal method. Compared to the catalytic property of bare SSM, our OER catalyst (0.84-CoFePi) showed a 42% improvement in current density at the potential of 1.9 V vs. RHE, and the onset potential was decreased by 26.5 mV. Furthermore, the loss in current density of bulk electrolysis after 12 h in 1 M KOH (pH 14) solution and 0.0441 wt% H2SO4 (pH ≈ 3) containing 0.1 M NaCl solution was negligible (3.1% and 3.2%, respectively). Moreover, our cobalt-doped iron phosphate on SSM exhibits the dramatic improvement in corrosion resistance to a basic, mild acidic solution and chloride ions compared to bare SSM.

Novel Photo(electro)catalysts for Energy and Environmental Applications

“…However, it heavily from severe corrosion in the presence of acidic fluids or chloride solution. To improve the corrosion resistance of SSM, in their contribution, An et al [20] incorporate cobalt-doped iron phosphate on SSM through a simple one-step hydrothermal method. Compared with bare SSM, the as-prepared OER catalyst (0.84-CoFePi) exhibits a dramatic improvement in corrosion resistance.…”