“…One recent progress presented a Pd membrane reactor for ammonia decomposition. [113] The simultaneous hydrogen production and separation [106] NaNH 2 , [105a] LiNH 2 , [105b] Li 2 Mg(NH) 2 , [105c] Li 2 Ca(NH) 2 , [105c] Fe (or Co, Ni)-Al, [146] Ni/SBA-15, [147] Fe@SiO 2 , [148] Fe@Al 2 O 3 , [148] Co 0.89 Fe 2.11 O 4 @ mSiO 2 , [149] Ni 5 Co 5 /fumed SiO 2 , [150] NiCo 9 /CZY, [151] NiMoN, [152] CoMoN/ Al 2 O 3 , [153] Mn-CaNH, [154] Ni/SiO 2 , [155] Ir/SiO 2 , [155] Ni/CNTs, [156] Ru-CNT, [157] K-Ru-CNT, [157] Ru-Ba(NH 2 ) 2 , [108c] Ru-CeO 2 , [158] Ru/fumed SiO 2 , [159] Ru/graphene, [160] Cs-Ru/graphene, [160] Ru/Al 2 O 3 , [105a] Ru/CTF, [161] K-Ru/ MgO-CNT, [100] Ru/MgO-poly, [162] Ru/K-ZrO 2 -KOH, [163] LiNH 2 -Ru/MgO, [164] Ru/MgO, [165] Ru/c-MgO, [166] Ru/ZrO 2 , [157] and Ru/AC. [157] Note that the H 2 production rates and NH 3 conversions are affected by the space velocities.…”