Electroenzymatic N2 reduction to ammonia by nitrogenase from Azotobacter vinelandii immobilized on low density graphite electrodes under direct electron transfer regime - Garcia-Molina, Gabriel; Echavarri-Erasun, Carlos; del Barrio, Melisa; Rubio, Luis M; Pita, Marcos; De Lacey, Antonio L (Electrochimica Acta, 2025)