<li><b>Phosphoric acid fuel cells (PAFCs):</b> PAFCs are used in stationary power generation applications. They are less efficient than other types of fuel cells but are relatively inexpensive.</li>5 T5 l1 C- V" C# }6 D
' w6 E! X% A( G# ^; j. I 8 h0 ]7 }8 g+ w) [3 q4 a - |. _& q' H$ C: j
' G3 U/ |( [+ ^1 i A& k ! j: Q( c4 X: A) Q# H4 m % c# i' I' Z6 f4 q$ Z/ E
0 b4 ^7 F$ E; a
<p>Researchers are actively exploring alternative electrolysis methods to improve efficiency. These include:</p>2 h. D* w6 |6 |; c9 J
<li><b>Steam methane reforming (SMR):</b> SMR is a widely used process for producing hydrogen from natural gas. While it is relatively inexpensive, it produces carbon dioxide as a byproduct.</li>