The rational synthesis of Pt-based alloyed nanowires still remains a great challenge because of the different reduction potentials between Pt and another metal and the intrinsic feature of isotropic growth in face-centered cubic (fcc) structured Pt. In this work, PtPd alloyed nanowires with ultrahigh aspect ratio anchored on graphene (PtPd NWs/ graphene) were synthesized by a facile solvothermal method without the use of any templates or surfactants. Due to the integration of ultralong PtPd nanowires and stable graphene support, PtPd NWs/graphene exhibited outstanding electro-chemical activity toward methanol oxidation reaction (MOR) in comparison with pure Pt NWs/graphene and commercial Pt/C catalysts. Meanwhile, PtPd NWs/graphene had a much higher current density than Pt NWs/graphene and commercial Pt/C catalysts at a constant potential for 7200s in alkaline methanol solution. Moreover, after 1000 cycles of durability testing, PtPd NWs/graphene retained 89.2% of its initial mass activity, much superior to the 63.7% retained for commercial Pt/C.

Exploiting directional electron transfer cascades could lead to high‐performance electrocatalysts for processes such as the hydrogen evolution reaction, but realising such systems is difficult. Herein, a hierarchical confined material (CoNi/Ru@C) is presented, which provides a suitable spatial junction to enable directional electron transfer, giving superior hydrogen evolution in alkaline water/seawater.

B 4 C-CrB 2 composites were prepared by arc-melting using B 4 C and CrB 2 powders as raw materials. The eutectic composition of B 4 C-CrB 2 system was 30B 4 C-70CrB 2 (mol%) with a labyrinth-like irregularly layered eutectic microstructure, composed of B 4 C phase about 1-2 μm in thickness dispersing in CrB 2 matrix, much smaller than raw powders. The interface of the eutectic composite was well bonded, and there were edge dislocations at the interface to alleviate the interface mismatch. The eutectic temperature of B 4 C-CrB 2 composites was approximately 2200 K. At the eutectic composition, the B 4 C-CrB 2 composites showed the maximum Vickers hardness (24.6 GPa) and fracture toughness (4.3 MPa m 1/2 ) at room temperature.