Pt al2o3

H₂PtCl₆·6H₂O (Pt ≥ 37%), FAL and other reagents were purchased from Sinopharm Group Co. Ltd and used as received. FOL, 5 wt% Pt/Al₂O₃ and 5 wt% Pt/C catalysts were purchased from Alfa Aesar. SiC–C composites were provided by Suzhou Yuhao Nanomaterial Inc. (Suzhou, China) and used as received.

The Pt/SiC–C–H₂ catalyst was prepared using an ultrasound-promoted impregnation method which was described elsewhere.^{33 (link)} In this case, the catalyst precursor was reduced in flowing hydrogen (99.999%, 40 ml min⁻¹) at 500 °C for 3 h. The resulting catalyst was designated as x wt% Pt/SiC–C–H₂, where x refers to the Pt weight percentage in the catalyst. In some cases, the catalyst precursor was calcined in static air at 200 °C for 2 h before the reduction treatment and the resulting catalyst was denoted as x wt% Pt/SiC–C-200-H₂. For comparison, x wt% Pt/SiC–C–SF catalyst was prepared in a similar manner as that for the x wt% Pt/SiC–C–H₂ catalyst, except that the catalyst was reduced by sodium formate in water at 95 °C. In addition, 5 wt% Pt/SBA-15, 5 wt% Pt/CMK-3 were also prepared using the same method. The 5 wt% Pt/C and Pt/Al₂O₃ catalysts bought from Alfa Aesar were also used for comparison.