Ni-based　catalysts　doped　with　Fe,　Co,　Cr,　and　Cu　were　successfully　synthesized　via　an　interesting　impregnation　method　with　EDTA　for　the　catalytic　decomposition　of　methane.　XRD,　N2　sorption,　SEM,　H2-TPR,　and　TPO　were　accomplished　for　catalyst　characterization.　Among　the　Ni-doped　catalyst　series,　the　Ni-Cu　catalyst　carried　out　better　toward　the　rest　of　the　Ni　catalysts,　and　a　rising　trend　in　the　CH4　conversion　from　61　to　86　%　was　perceived　with　a　rise　in　temperature　in　the　range　of　575–650　°C,　which　was　associated　with　its　high　surface　area　(104.3　m2.g−1)　and　good　low-temperature　reducibility.　Furthermore,　the　maximum　CH4　conversions　of　28,　86,　81,　and　78　%　were　acquired　over　the　50Ni-xCu/SiO2.MgO　(x　=　2.5,　5,　7.5,　and　10　wt%)　at　650　°C　with　a　GHSV　=　24000　mL　h−1　gcat−1　and　CH4:N2　=　3:17,　respectively.　The　optimal　specimen　(5　wt%　Cu)　with　a　slow　decline　in　activity　depicted　better　durability　in　the　stability　test　at　675　°C　for　300　min　compared　to　the　quick　deactivation　of　other　Cu　loadings　within　150　min　of　reaction　initiation.　SEM　micrograph　of　spent　specimens　with　diverse　Cu　loadings　indicated　that　the　generated　carbon　is　whisker　type.　©　2024　Elsevier　Ltd