| Bi/PO4/PSS(A) | Equal volumes of solutions of Na2HPO4 (4 mM), Bi(NO3)3 (1 mM), and Nafion are mixed. Then, 5 μL of this solution is drop-casted onto the working electrode. |
| Bi/PO4/PSS(A) | Equal volumes of solutions of Na2HPO4 (4 mM), Bi(NO3)3 (1 mM), and Nafion are mixed. Then, 5 μL of this solution is drop-casted onto the working electrode. |