Core-shell nanoparticles (CSNs) are a class of nanostructured materials that have recently received increased attention owing to their interesting properties and broad range of applications in catalysis, biology, materials chemistry and sensors. By rationally tuning the cores as well as the shells of such materials, a range of core-shell nanoparticles can be produced with tailorable properties that can play important roles in various catalytic processes and offer sustainable solutions to current energy problems. Various synthetic methods for preparing different classes of CSNs, including the Stöber method, solvothermal method, one-pot synthetic method involving surfactants, etc., are briefly mentioned here. The roles of various classes of CSNs are exemplified for both catalytic and electrocatalytic applications, including oxidation, reduction, coupling reactions, etc.

Catalysis Division CSIR National Chemical Laboratory Dr Homi Bhabha Road Pune 411008 India

Department of Chemistry and Chemical Biology Rutgers The State University of New Jersey 610 Taylor Road Piscataway New Jersey 08854 USA and Department of Chemical and Biochemical Engineering Rutgers The State University of New Jersey 98 Brett Road Piscataway New Jersey 08854 USA

Department of Materials Science and Engineering College of Materials Xiamen University Xiamen 361005 People's Republic of China

Regional Centre of Advanced Technologies and Materials Faculty of Science Department of Physical Chemistry Palacky University Šlechtitelů 11 783 71 Olomouc Czech Republic

Regional Centre of Advanced Technologies and Materials Faculty of Science Department of Physical Chemistry Palacky University Šlechtitelů 11 783 71 Olomouc Czech Republic and Department of Chemistry and Chemical Biology Rutgers The State University of New Jersey 610 Taylor Road Piscataway New Jersey 08854 USA

Sustainable Technology Division National Risk Management Research Laboratory US Environmental Protection Agency 26 West Martin Luther King Drive MS 443 Cincinnati Ohio 45268 USA

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