Platinum decorated mesoporous titanium cobalt nitride nanorods catalyst with promising activity and CO-tolerance for methanol oxidation reaction

摘要

In this study, mesoporous titanium cobalt nitride nanorods (Ti0.9Co0.1N NRs) hybrid as non-carbon platinum supports is successfully prepared by a solvothermal process and subsequent nitridation process. The highly porous materials can provide abundant binding sites for growing well-dispersed Pt. The X-ray photoelectron spectroscopy results indicate that the cobalt element doping promoted the interaction of platinum and support. Notable, the peak current density of Pt/Ti0.9Co0.1N NRs catalyst is 0.85 A mgpr(-1), which 3.4-fold of Pt/C catalyst. What's more, the onset potential (0.34 V) of CO oxidation on Pt/Ti0.9Co0.1N NRs is lower than on the Pt/C (0.47 V) and Pt/TiN NRs (0.37 V). The results confirmed the mesoporous Pt/Ti0.9Co0.1N NRs catalyst unfolds a much enhanced catalytic activity and CO tolerance for methanol oxidation. The exceptional electrocatalytic properties are achieved for the Pt/Ti0.9Co0.1N NRs catalysts due to its unique porous structure and the electronic effect of robust Ti0.9Co0.1N NRs introduced by the cobalt element doping. (C) 2018 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.