doesn't work

you can simulate through pspice

There is no problem with the basic dc to dc buck converter power circuit working at no-load in real life. Try out one in open-loop mode without the output LC filter . The problem is with the output LC filter. Since there is no continuous current through the inductor, the capacitor voltage is not defined and will try to charge up to the peak input voltage, with no load connected across it to discharge it. That is why in real life 'bleeder resistances' are connected across the output such that even though no external load is connected, the converter sees a minimum load for stable operation.

In no load condition, output voltage of buck converter will increase, same as the dc input voltage. 

Analysis:

When the static switch conduct, the capacitor will be charged from dc input via inductor. 

When the switch in "off" condition, the energy in the inductor will passed to capacitor via diode.

Since no load connected to capacitor, so the capacitor never discharge. As the result, the capacitor voltage will increase to dc input voltage.

After the capacitor voltage same as the dc input voltage, no current flow in the circuit when the switch conduct or not.