Characterization of the role of Fat10 in Tumorigenesis

Ph.DDOCTOR OF PHILOSOPH

Surface and corrosion properties of Type 430 ferritic stainless steel in parsley (Petroselinum Sativum) essential oil-containing sulphuric acid solution

Abstract: This study examined the corrosion inhibiting properties of parsley (petroselinum sativum) essential oils, for Type 430 ferritic stainless steel in 0.5 molar sulphuric acid solutions. In this study, weight loss, electrochemical and scanning electron microscope techniques were used in gaining a detailed understanding of inhibition effects of parsley (petroselinum sativum) essential oils(PEO) on Type 430 ferritic stainless steel corrosion. The inhibitor studied exhibits good anti-corrosion performance with 98.65% inhibition efficiency. This result could be ascribed to the adsorbed PEO on the surface of the stainless steel, and this was verified by surface visualization using optical and scanning electron microscope techniques while the crystallographic variation of the inhibited sample is studied by x-ray diffraction (XRD). The adsorption of PEO onto stainless steel surface is controlled by Langmuir adsorption isotherms. Optical images of non-inhibited specimens showed a severely corroded surface with a visible macro pit on the stainless steel from sulphuric solutions. The inhibited sample shows improved surface owing to the surface protection effect of PEO molecules. The corrosion inhibition performance of PEO is due to the presence of active constituents which enhanced the film formation over the surface of the metal, thus, mitigating corrosion

Study of a metal hydride based thermal energy storage system using multi-phase heat exchange for the application of concentrated solar power system

Abstract: Thermal energy storage system is of great significance for the concentrated solar power system to keep the balance between power generation and demand. Metal hydride based thermal energy storage system is regarded as a promising method due to its good reversibility, low cost, and no by-product. Multi-phase heat exchange has much higher heat transfer coefficient than single-phase fluid heat exchange, thus facilitating the steam generation. In this study, a two-dimensional model of the metal hydride reactor using multi-phase heat exchange is proposed to estimate the performance and its feasibility of application in the concentrated solar power system. The results show that the velocity of the heat transfer fluid should match well with the thermal conductivity of the metal hydride bed to maintain the heat flux at a relatively constant value. The match of thermal conductivity of 3 or 5 W/(m·K) and fluid velocity of 0.0050 m/s results in the heat flux up to about 19 kW/m2, which is increased by 3 orders of magnitude than single-phase heat exchange. In the thermal energy storage system, the reheating cycle is recommended to improve the utilization of the thermal energy. The efficiency of the system could be improved from 18.4% to 30.8% using the reheating cycle. The increased efficiency is comparable to the previously reported efficiency of 39.2%. Besides, the operation strategy of raising the steam temperature by increasing the hydrogen pressure or the superheater temperature is suggested for the system to obtain higher efficiency

Advances, Mechanisms and Applications in Oxygen Evolution Electrocatalysis of Gold- driven

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the Creative Commons Attribution-Non Commercial-No Derivatives CC BY-NC-ND licence, https://creativecommons.org/licenses/by-nc-nd/4.0/The oxygen evolution reaction (OER) plays a crucial role in electrochemical energy storage and conversion. Among different metal elements, gold (Au) stands out due to its high electronegativity and remarkable catalytic properties, especially in nanoscale size. In this review, we aim to comprehensively analyze the oxygen electrocatalytic performance of nanosized Au, including the influence of the crystal surface, morphology, substrate materials of Au nanoparticles, size and ligands of Au nanoclusters, and Au single atoms on oxygen electrocatalysis. By exploring the catalytic performance of noble metals, non-noble metals, oxides, hydroxides/oxyhydroxides/layered double hydroxides, sulfides, phosphides, nitrides, and selenides through the integration of nanosized Au, which offers valuable insights for enhancing the OER efficiency. These effects can be attributed to two mechanisms: i) adsorbate evolution mechanism (AEM) and ii) lattice oxygen mechanism (LOM), where the nanosized Au changed the electronic structure of the catalysts and improved the adsorption of reaction intermediates to accelerate electron transfer process or exerts the synergistic effect between metallic Au and oxygen vacancies. For instance, Au-driven OER catalysts can be widely used in zinc-air batteries and water splitting in the future.Peer reviewe