Green and sustainable bifunctional carbonized wood electrodes decorated with controlled nickel/α(β)-nickel(ii) hydroxide to boost overall water splitting

For highly efficient bifunctional electrodes, flower-shaped Ni/α-Ni(OH) 2 particles and nanosheet-shaped Ni/α&β-Ni(OH) 2 arrays are in situ grown on 3D carbonized wood to accelerate mass transfer and release generated bubbles during overall water splitting.