 BOSTON--BUSINESS WIRE--Advent Technologies Holdings, Inc. NASDAQ: ADN Advent, an innovation-driven company in the fuel cell and hydrogen technology space, today announced that it has signed an eight-year lease for 21,401 square feet in the heart of Bostons innovation and RD community at Hood Park in Charlestown, MA The purpose of the new Advent Technologies facility is to accelerate product development on recent next-generation membrane electrode assembly MEA 