Surface Microstructure Modulation Strategy to Design an Amphiphobic Platinum Nanocatalyst for Efficient Catalytic Oxidation of Hydrogen Isotopes

Security risks of hydrogen isotopes in hydrogen energy sections and nuclear projects require systems to remove hydrogen isotopes. The oxidation of hydrogen isotopes in a system depends on the efficiency of the catalyst. However, the performance of the catalyst is often reduced by water and volatile organic compounds (VOCs) present in the air. In this study, a surface microstructure modulation strategy is adopted to prepare honeycomb Pt catalysts with an amphiphobic surface ( [email protected] ) for the efficient oxidation of hydrogen isotopes. The surface microstructure of the honeycomb carrier is modulated by surface roughening and postfluorination. The optimized substrate shows a water contact angle of 138.9° and a contact angle of 125.4° with n -hexadecane. [email protected] exhibits a much higher H 2 /D 2 conversion than commercial catalysts in a wet environment with VOCs. Additionally, [email protected] can retain a catalytic efficiency of more than 95% after 83.5 h of continuous working and intermittent operation. The isotope effect on the oxidation of H 2 and D 2 ( K F,H2 / K F,D2 ) is 1:0.88, which is much lower than that of most of the other catalysts and indicates the good catalytic performance of tritium oxidation. This work demonstrates a surface microstructure modulation technology to improve catalytic performance and will also be a strategy for designing efficient catalysts in a practical environment.