Hollow Fibers Networked with Perovskite Nanoparticles for H2 Production from Heavy Oil

Abstract

Design of catalytic materials has been highlighted to build ultraclean use of heavy oil including liquid-to-gas technology to directly convert heavy hydrocarbons into H2–rich gas fuels. If the H2 is produced from such heavy oil through high-active and durable catalysts in reforming process that is being constructed in hydrogen infrastructure, it will be addressed into renewable energy systems. Herein, the three different hollow fiber catalysts networked with perovskite nanoparticles, LaCr0.8Ru0.2O3, LaCr0.8Ru0.1Ni0.1O3, and LaCr0.8Ni0.2O3 were prepared by using activated carbon fiber as a sacrificial template for H2 production from heavy gas oil reforming. The most important findings were arrived at: (i) catalysts had hollow fibrous architectures with well-crystallized structures, (ii) hollow fibers had a high specific surface area with a particle size of ≈50 nm, and (iii) the Ru substituted ones showed high efficiency for H2 production with substantial durability under high concentrations of S, N, and aromatic compounds.

Influence of La3+induced defects on MnO2–carbon nanotube hybrid electrodes for supercapacitors

“…[28][29] The G band or graphitic band arises because of in plane vibration of sp 2 Mn4+ and Mn3+ states in accordance with established literature [32][33]. In addition, for 2La-MnO 2 -CNT doped sample, the La 3d region showed a broad feature (due to low weight fraction of La) corresponding to La+3 states [34] ( Figure S3c of Supporting information).…”

Interface-designed Membranes with Shape-controlled Patterns for High-performance Polymer Electrolyte Membrane Fuel Cells

“…The patterned Nafion membrane exhibited an exceptional performance of 1906 mW/cm 2 at Pt loading of 0.4 mg/cm 2 with a Pt utilization of over 80%, which shows 73% higher value in performance than the commercial membrane. These results indicate that control of the interface structure by patterning technique is important and potential feature to obtain high PEMFC performances at lower Pt loading of 0.2 mg/cm 2 and at air/low humidity operation.…”

“…In order to achieve a sustainable future, polymer electrolyte membrane fuel cells (PEMFCs) have been proposed as a promising alternative due to their high efficiency and environmental compatibility for potential applications in non-polluting transportation, stationary and portable electronics 1 2 3 . Although PEMFC technology has provided high performance competitive with those of alternative technologies, several challenges remain for commercialization such as the high cost, reliability and performance of membrane electrode assemblies (MEAs) 4 5 6 7 .…”

Platinum incorporation into titanate perovskites to deliver emergent active and stable platinum nanoparticles

“…XPS O 1s (Fig. S9b-d) showed that the perovskite surface possesses a large portion of active oxygen (OD+OC) species (4,22), resulting in oxygen sites that are involved more in oxidation reactions rather than OL. These were further increased, especially OD through the Pt emergence.…”