Preparation of Fe2P and FeP catalysts for the hydrotreating reactions

Cobalt phosphide nanocage@ferric-zinc mixed-metal phosphide nanotube hierarchical nanocomposites for enhanced overall water splitting

“…The peaks at 26°, 26.7°, and 31.4° mainly originate from the ZnP2 phase and are matched well to the (1 0 4), (1 1 2), and (1 1 4) planes, respectively (JCPDF 24-1464) [39]. The peaks at 40.2° and 44.1° mainly originate from Fe2P and matched well with the (1 1 1) and (2 0 1) planes, respectively (JCPDF 51-0943) [40,41]. All the other peaks are characteristic of Co2P (JCPDF 32-0306) and also matched well with the (1 2 1) and (2 0 1) planes [42,43].…”

Preparation of Fe2P/Al2O3 and FeP/Al2O3 catalysts for the hydrotreating reactions

“…According to the broadening of Fe (110) peak at 44.6 °and the Scherrer equation, the average particle size of Fe formed in the 60% Fe/Al 2 O 3 was estimated to be about 15 nm, which was significantly smaller than that in the 60% Fe/C (29 nm) reported previously [15] , indicating that the dispersion of Fe on Al 2 O 3 was much higher than that on carbon.…”

“…The reduction and phosphidation of the Fe/Al 2 O 3 catalyst were performed as reported previously [15] . Typically, the Fe/Al 2 O 3 was loaded into a micro-reactor and sandwiched with quartz sands, followed by a reduction in flowing H 2 (1 atm, 40 mL/min) at 773 K for 2 h. Then, the sample was cooled down to 443-593 K, at which a heptane solution containing 2% PPh 3 was pumped into the reactor with liquid hourly space velocity (LHSV) of 2 h −1 and H 2 /oil of 300 (v/v) for 18-36 h.…”

“…The [15] , and the formed Fe might be then converted into Fe 3 S 4 and Fe 0.96 S during the hydrotreating reactions. According to the broadening of Fe 2 P peak at 40.3 °and Scherrer equation, the average sizes of Fe 2 P particles in the fresh and used catalyst were estimated to be about 15.3 and 18.6 nm ( Table 2 ), respectively, indicating that the Fe 2 P particles grew during the hydrotreating reactions.…”

“…Recently, we prepared 60% Fe/C, 80% Fe/C and un-supported Fe catalysts [15] . Using carbon as a support was to ensure the dispersion and reduction of supported Fe.…”