Dry reforming of methane using modified sodium and protonated titanate nanotube catalysts

[Display omitted] •Metal-modified TNT were evaluated as catalysts on the dry reforming of methane.•NaTNT was used as support for Co, Cu, Zn and Ni metals.•Ni-NaTNT led to 45 and 79% CO2 and CH4 conversion, respectively.•Ni-NaTNT were more resistance to coke formation. The mitigation of carbon emissions is an imminent and extremely relevant issue. In addition to carbon dioxide (CO2), methane (CH4) also contributes significantly to climate change. Dry reforming of methane (DRM) is a promising alternative to mitigate this gas, generating syngas, an important precursor of several chemical routes. In this context, sodium and protonated titanate nanotubes (TNT) were modified with metals (Co, Cu, Zn and Ni) and evaluated as catalyst for DRM. Zn-NaTNT, Co-NaTNT and Cu-NaTNT showed low catalytic activity (CO2 and CH4 conversion