“…Another important aspect of catalyst optimization is the influence of the preparation method/condition on catalyst texture and morphology, which, in turn, has an influence on catalyst activity and selectivity. 386,408 The majority of the catalytic applications of HAs deal with combustion 9 , 1 5 2 , 1 5 6 , 1 9 4 , 3 1 4 , 3 1 9 , 3 2 0 , 3 3 7 , 3 4 2 , 3 5 2 , 3 5 5 , 3 5 6 , 364−367,403,407,410,416,420,429,430,495−509 (e.g., of methane for gasturbine applications). 154,306,309,315,338,345,347,359,363,368,369,376,381,415,417,421,510,511 Ni-substituted or -supported HAs are of interest as catalyst precursors for Ni-catalyzed (i) steam reforming (CH 4 + H 2 O → CO + 3H 2 ), 434,512−515 (ii) for partial oxidation of hydrocarbons, in paricular methane (POM, CH 4 + 1 / 2 O 2 → CO + 2H 2 ), 22,32,349,350,398,422,516−521 (iii) for dry reforming of methane (DRM, CH 4 + CO 2 → 2CO + 2H 2 ), 351,395−397,399,400,408,522−525 (iv) for methanation of CO (CO + 3H 2 → CH 4 + H 2 O), 385,404,526 and (v) for the water− gas-shift reaction (CO + H 2 O ⇌ CO 2 + H 2 ).…”