X-ray diffraction reinvestigation of the Ni-Pt phase diagram

Platinum(IV) Carbonato Complexes: Formation via the Addition of CO2 to the [Pt(OH)6]2– Anion and Generation of Platinum(IV) Oxide Nanoparticles for the Preparation of Catalysts

“…Finally, the prepared PtO 2 –Ni­(OH) 2 /support composites were calcined in the H 2 stream and Pt–Ni alloyed particles anchored on supporting materials were formed as evidenced by PXRD data (Figure S11). For all catalysts, the initial nickel loading was fixed at 6 wt %, while the Pt content was varied to fit three different stoichiometries (PtNi 3 , PtNi, and Pt 3 Ni) corresponding to three intermetallic compounds known for the Pt–Ni system . The final composition of resulting catalysts was determined with ICP–AES analysis, and results are given in Table S4.…”

“…For all catalysts, the initial nickel loading was fixed at 6 wt %, while the Pt content was varied to fit three different stoichiometries (PtNi 3 , PtNi, and Pt 3 Ni) corresponding to three intermetallic compounds known for the Pt−Ni system. 73 The final composition of resulting catalysts was determined with ICP−AES analysis, and results are given in Table S4.…”

Elucidating the Correlation between ORR Polarization Curves and Kinetics at Metal–Electrolyte Interfaces

“…Pt(100), Pt(110), and Pt(111) were modeled by four-layered 4 × 4 slabs (Figure S1). Furthermore, to investigate the influence of different Pt/Ni ratios on the ORR activity, three PtNi bulk alloys with different Pt and Ni atomic ratios are considered in this work, including Pt 3 Ni­(111), − Pt 2 Ni 2 (111), , and PtNi 3 (111), ,− because only the (111) surface has been reported in literature . The corresponding Pt and Ni atoms with ratios of 3:1, 2:2, and 1:3 were uniformly distributed in four-layered 4 × 4 slab models (Figures and S2).…”

Synthesis of highly ordered L10 MPt alloys (M = Fe, Co, Ni) from crystalline salts: an in situ study of the pre-ordered precursor reduction strategy

“…, Mn–Pt and Mn–Ni) for spintronic devices. 31 According to the bulk equilibrium phase diagram, 32–35 around the equiatomic composition, the chemically ordered L1 0 phase, consisting of planes of pure atoms alternating along the c -axis of the face-centered tetragonal (fct) unit cell (ESI,† Fig. S1), is stable below the order/disorder transition temperature T O–D , which is characteristic of each system.…”

“…25 Paramount examples of chemically ordered compounds include: (i) Fe(Co)-Pt and Fe(Co)-Pd ferromagnetic alloys for data storage/processing and catalysis, which feature a huge uniaxial magnetic anisotropy (K = 0.5-1 Â 10 7 J m À3 ) 26 that can be intrinsically obtained without resorting to complex multilayered structures; [27][28][29] (ii) high-anisotropy Mn-Al and Fe-Ni alloys (K = 1-2 Â 10 6 J m À3 ) 30 that are cost-effective alternatives to materials containing critical elements for the development of sustainable permanent magnets and electronics; and (iii) antiferromagnetic alloys (e.g., Mn-Pt and Mn-Ni) for spintronic devices. 31 According to the bulk equilibrium phase diagram, [32][33][34][35] around the equiatomic composition, the chemically ordered L1 0 phase, consisting of planes of pure atoms alternating along the c-axis of the face-centered tetragonal (fct) unit cell (ESI, † Fig. S1), is stable below the order/ disorder transition temperature T O-D , which is characteristic of each system.…”