Layered Double Hydroxide-Derived Intermetallic Ni₃GaC_0.25 Catalysts for Dry Reforming of Methane

Abstract

Banquet (RoomA) KL-1 Prof. Yong-Ki Park (Korea Research Inst. Chem. Tech.) (RoomA) KL-2 Prof. Yuichi Kamiya (Hokkaido Univ.) (RoomA) PL-3 Prof. Wha-Seung Ahn (Inha Univ.) (RoomA) Break GO B01-B6 Break PL-4 Prof. Ichiro Yamanaka (Tokyo Inst. Tech.) (RoomA) Break Room A Room B GO A15-A20 GO B15-B20 GO A21-A26 GO B21-B26 Closing Remark (RoomA) Break KL-3 Prof. Sung June Cho (Chonnam National Univ.) (RoomA) (RoomA)KL-4 Prof. Noritatsu Tsubaki (Univ. of Toyama) Break

Enhanced acetylene semi-hydrogenation on a subsurface carbon tailored Ni–Ga intermetallic catalyst

“…S3, † indicating the absence of carbon atoms incorporated into the Ni lattice. Instead, the dissociated carbon atoms from acetylene molecules prefer to assemble on the monometallic Ni surface to form carbon nanobers, 6,26 which is also conrmed by the SEM images in the ESI, Fig. S4.…”

“…This demonstrates the electron-decient character of the Ni atoms in the Ni 3 GaC 0.5 catalyst due to the considerable electron transfer from Ni atoms to the adjacent C atoms, 8,11,12,15 which is in good accordance with the XPS analyses. Furthermore, the extended Xray absorption ne structure (EXAFS) spectrum of the Ni 3 GaC 0.5 catalyst shows an obvious scattering peak at 1.7 Å, 26 which is assigned to the formation of Ni-C coordination in Fig. 3d.…”

“…In addition to these characteristic peaks of the support, the XRD pattern of the Ni catalyst shows obvious diffraction peaks at 44.3°, 51.7° and 76.1° ascribed to the crystalline planes (111), (200) and (220) of the face-centred cubic (FCC) Ni phase (JCPDS No. 65-0380), 8,15,26 respectively. In contrast, the pattern of the intermetallic Ni 3 Ga catalyst exhibits three diffraction peaks at 43.7°, 50.9° and 74.9° attributed to the (111), (200) and (220) planes of the Ni 3 Ga intermetallic phase with an FCC crystal structure (JCPDS No.…”

“…1b. The peak at 43.7 assigned to Ni 3 Ga(111) shis gradually to smaller diffraction angles on increasing the processing time during the process, suggesting the incorporation of C atoms into the lattice of Ni 3 Ga. 6,26,37 Aer processing for 160 min, the XRD pattern in the ESI, Fig. S2 † demonstrates the complete formation of the Ni 3 GaC 0.5 phase (JCPDS No.…”

“…For acetylene semihydrogenation, light atoms, such as carbon and lithium, located inside the lattice of active metals have been well illustrated to remarkably improve the catalytic performances, especially the selectivity to ethylene. 6,[26][27][28] In this work, we propose to employ carbon atoms to be incorporated into the Ni 3 Ga intermetallic with partially isolated Ni sites aiming to tailor the catalytic performances for acetylene semihydrogenation. The Ni 3 Ga intermetallic catalyst was synthesized using quaternary Ni/Ga/Mg/Al layered double hydroxides (LDHs) as the precursor.…”