Development of highly stable Ni-doped zeolitic imidazole framework (ZIF-67) based catalyst for CO2 methanation reaction by Aldoghachi, Ali, Yun Hin, Taufiq-Yap, Saiman, Mohd Izham, Voon, Lee Hwei, Zheng, Alvin Lim Teik, Seenivasagam, Sivasangar