The high entropy alloy (HEA) nanoparticles have been prepared using cast cum cryo-milling process. In which, the Au, Ag, Pd, Pt and Cu (99.9 at. % pure, Alfa Aesar, USA) melted under argon environment to synthesize cast HEAs and afterwardcast HEA have been milled in cryomill for 6 hours. The detailed synthesis process can be found elsewhere. 1 The cryomilled powder (HEA nanoparticles) has been characterizedin order tothe crystalline phase, size, chemical homogeneity, composition, and catalyst activity. The X-ray diffraction recorded using Panalytical empyrean ( max =1.54056 A),and size of nanoparticles have been estimated using Transmission electron microscope (FEI, Technai G 2 , UT 20 operated at 200

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Platinum nanoparticles with average diameters of 2−3 nm have been coated on multiwalled carbon nanotubes by controlled attachment of an intermediate on the walls of the nanotube. Reduction of the intermediate leads to the formation platinum nanoparticles which are uniformly coated on the nanotubes. This composite shows excellent electrocatalytic activity toward methanol oxidation and hence is a candidate material for fuel cell applications. Cyclic voltammetry and chronoamperometry studies indicate that these composites have a better electrocatalytic activity for methanol oxidation compared with a commercial Pt−carbon mixture with similar Pt loading. The intermediate approach for the formation of hybrids is general and can be extended to other systems.

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Ru 0.05 Ce 0.95 O x is an active catalyst for methanation of CO 2 with H 2 . Under reaction conditions one expects that oxygen vacancies are present on the oxide catalyst surface and that their steady-state concentration depends upon the relative ratio of the oxidant (CO 2 ) to the reductant (H 2 ). We show that the activity of the catalyst is sensitive to the degree of surface reduction: a surface that is too reduced or too oxidized loses activity. Exposing the oxidized surface to CO 2 and then to H 2 produces no methane, while on a reduced surface methane is produced by exposure to CO 2 followed by H 2 . If the reaction is carried out at the steady state, purged, and then exposed to only hydrogen, methane is produced. Methane is formed through the reaction of hydrogen with surface species, whose infrared spectrum is associated with a variety of surface carbonates, and not through CO or a formate intermediate.

A novel coronavirus, SARS-CoV-2, thought to have originated from bats causes COVID-19 infection which was first reported from Wuhan, China in December 2019. This virus has a high infectivity rate and has impacted a significant chunk of the population worldwide. The spectrum of disease ranges from mild to severe with respiratory system being the most commonly affected. Cardiovascular system often gets involved in later stages of the disease with acute cardiac injury, heart failure and arrhythmias being the common complications. In addition, the presence of cardiovascular co-morbidities such as hypertension, coronary artery disease in these patients are often associated with poor prognosis. It is still not clear regarding the exact mechanism explaining cardiovascular system involvement in COVID-19. Multiple theories have been put forward however, more robust studies are required to fully elucidate the “heart and virus” link. The disease has already made its presence felt on the global stage and its impact in the developing countries is going to be profound. These nations not only have a poorly developed healthcare system but there is also a huge burden of cardiovascular diseases. As a result, COVID-19 would adversely impact the already overburdened healthcare network leading to impaired cardiovascular care delivery especially for acute coronary syndrome and heart failure patients.

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