Water splitting in near-neutral media: using an Mn–Co-based nanowire array as a complementary electrocatalyst

A Mn–Co–borate nanowire array on carbon cloth (Mn–Co–Bi/CC) acts as an efficient electrocatalyst for water oxidation with an overpotential of 366 mV to drive 10 mA cm⁻² in 0.5 M K-Bi. The two-electrode electrolyser using Mn–Co–Bi/CC as the anode and MnCo₂O₄/CC as the cathode drives 10 mA cm⁻² at 1.97 V.