A 1 wt% Ni-based La 2 Zr 2 O 7 pyrochlore catalyst was synthesized using the modified Pechini method. The catalyst was characterized by H 2 -TPR, and pre-and postreaction XRD, and tested for its methane-reforming activity under three different reaction conditions: (a) dryreforming (CH 4 ? CO 2 ), (b) oxy-CO 2 reforming (CH 4 ? CO 2 ? O 2 ), and (c) bi-reforming (CH 4 ? CO 2 ? H 2 O). The TPR results show that NiO in the fresh, calcined catalyst is completely reversible to Ni 0 . The XRD results show that the crystalline pyrochlore structure is stable under all three reaction conditions. Under dry-reforming conditions, the catalyst deactivated rapidly. In oxy-reforming, the catalyst activity also decreased, but far less rapidly than under dry-reforming conditions. However, under bi-reforming conditions, no deactivation was observed at comparable times-on-stream. TPO of the spent catalysts showed greatest carbon deposition for the dryreforming, a significant portion of which was graphitic and difficult to remove. For oxy-reforming, there was much less carbon deposition as compared to the dry-reforming, and a major part of which was the amorphous, atomic carbon, which is relatively easy to remove. Unlike under bi-reforming, no significant carbon deposition was observed at the conditions tested here. This indicates that the presence of steam resists carbon deposition compared to dry-reforming or oxy-reforming.