Electrolyte: molten potassium dihydrogen phosphate
Working electrode: platinum, tungsten plate
Counter electrode: Platinum plate
Reference electrode: Ag/Ag3PO4 electrode
The scanning voltage is from -0.7V to -1.55V for Ag/Ag3PO4, and the scanning rate is 5mV/s. Platinum's LSV curve has a lot of noise and a sharp drop, shown below. The curves of other metals (tungsten, tantalum, molybdenum) are smooth.