** Pure Hydrogen Corp PH2.AX soars as much as 18.3% to A$0.11, highest since August 19
** Stock set for best day since August 11
** Clean energy co signs letter of intent with U.S. truck distributor GTS Group to roll out hydrogen-powered heavy vehicles in North America
** Under deal, GTS to buy co's Class 8 hydrogen-powered SOT Tractors, rigid trucks suited for waste collection, concrete mixer applications
** PH2 last up 7.5%, trims YTD losses to 4.8%
(Reporting by John Biju in Bengaluru)
((John.Biju@thomsonreuters.com;))