Catalyst conversion comparison efficiency from the use of transition metallic catalytic converters: A literature reviewSudirman Rizki Ariyanto, Warju Warju, Ferly Isnomo Abdi, Susi Tri Umaroh, Lailatus Sa’diyah Yuniar Arifianti, Yustin Setiya Widoretno and Ata Syifa’ NugrahaEPJ Web Conf., 344 (2025) 01013DOI: https://doi.org/10.1051/epjconf/202534401013