Rabbit Anti-ARC monoclonal antibody, clone TS45-13

Extensive efforts have aimed at securing stable Pt-based electrocatalysts having both the performance-efficiency and long-term durability particularly for proton-exchange membrane fuel cells. Herein, we introduce an unprecedented electrocatalyst architecture based on a core-shell phase-mediated Pt/carbon black (CB) support structure which was enabled by the graphitization process using a Ni nanoparticle template. A similar to 1.03 nm-thick shell layer of graphitic carbon (GC) formed around the surface of similar to 9 nm-scale Ni core-nanoparticles via the dissolution-precipitation process with the annealing step of Ni on CB. The final Pt/GC/Ni/CB catalyst demonstrated noticeably better electrocatalytic performance in oxygen reduction reaction than that of the catalyst without the GC layer. The accelerated durability test with 5,000 cycles confirmed the advantages of the GC shell layer by demonstrating less electrochemical degradations by similar to 4.4 times in electrochemical surface area and similar to 2.5 times in the half-wave potential, compared to those of the reference sample.

Large-area TiC-Ni coating deposited through the overlapping of single-line TIG arc scanning under different welding current exhibited superior uniformity at 0% (end to end) over 50% overlapping. The micro-hardness value measured laterally on the coating showed that the majority of the hardness values are within 500-1500 HV for 50% overlapping, whereas, for 0%, the hardness readings are random. The sliding wear test of the coating executed against SiC abrasive-disc indicated a large discrepancy in the average wear for test specimen with 0% overlapping as compared to 50%. The results indicated the viability of a large-area hard and wear-resistance TiC-Ni coating by the TIG cladding method, which unveiled sufficient constancy in the performance for higher overlapping of TIG arc scanning.