Promotional roles of second metals in catalyzing methane decomposition over the Ni-based catalysts for hydrogen production: A critical review

Promotional role of NiCu alloy in catalytic performance and carbon properties for CO2-free H2 production from thermocatalytic decomposition of methane

“…Use of a secondary metal as a dopant is one approach that can improve catalytic stability. 6,13,14 Various bimetallic catalysts have been explored, such as NiCo, NiFe, NiPd, NiMo and NiCu. [15][16][17][18][19][20][21][22][23][24][25] Enhanced catalytic stability is generally attributed to alloy formation.…”

“…Use of a secondary metal as a dopant is one approach that can improve catalytic stability [6,13,14].…”

Unveiling the Roles of Precursor Structure and Controlled Sintering on Ni-Phyllosilicate-Derived Catalysts for Low-Temperature Methane Decomposition

“…3 In this regard, the transition-metalcatalyzed direct decomposition of CH 4 into its elements (catalytic methane decomposition; CMD) is a promising technology for large-scale carbon-neutral H 2 production because it (1) can leverage existing infrastructure for storage and transport of natural gas, (2) is much less endothermic than SRM (ΔH 298K of 37 kJ/mol Hd 2 vs 63 kJ/mol Hd 2 for SRM), (3) produces CO x -free hydrogen that is required for fuel cell applications, and (4) produces carbon nanotubes (CNTs) or carbon nanofibers (CNFs) as potentially valuable byproducts. 4,5 CMD is catalyzed by transition-metal nanoparticles (NPs) that can activate CH 4 while facilitating carbon diffusion and precipitation in the form of growing CNTs. As both the reaction rate and equilibrium conversion increase with temperature, many studies have focused on developing active and stable catalysts operating at relatively high temperatures (ca.…”

Catalytic methane decomposition to hydrogen and carbon over hydrotalcite‐derivative composition‐uniform and sintering‐resistant Ni‐Fe / Al 2 O 3 alloy catalysts

“…[12][13][14][15][16][17][18][19][20] It has been indicated that the addition of a second metal to the nickel catalyst can improve the catalytic performance of CDM. 21 In this regard, Cu-promoted Ni catalysts have been widely investigated and demonstrated to enhance the catalytic life and carbon yield in CDM. In addition to Cu, Fe is also used to modify the Ni catalyst.…”