The applications of copper (Cu) and Cu-based nanoparticles, which are based on the earth-abundant and inexpensive copper metal, have generated a great deal of interest in recent years, especially in the field of catalysis. The possible modification of the chemical and physical properties of these nanoparticles using different synthetic strategies and conditions and/or via postsynthetic chemical treatments has been largely responsible for the rapid growth of interest in these nanomaterials and their applications in catalysis. In addition, the design and development of novel support and/or multimetallic systems (e.g., alloys, etc.) has also made significant contributions to the field. In this comprehensive review, we report different synthetic approaches to Cu and Cu-based nanoparticles (metallic copper, copper oxides, and hybrid copper nanostructures) and copper nanoparticles immobilized into or supported on various support materials (SiO2, magnetic support materials, etc.), along with their applications in catalysis. The synthesis part discusses numerous preparative protocols for Cu and Cu-based nanoparticles, whereas the application sections describe their utility as catalysts, including electrocatalysis, photocatalysis, and gas-phase catalysis. We believe this critical appraisal will provide necessary background information to further advance the applications of Cu-based nanostructured materials in catalysis.

Department of Chemical and Biochemical Engineering Rutgers The State University of New Jersey 98 Brett Road Piscataway New Jersey 08854 United States

Department of Chemistry and Chemical Biology Rutgers The State University of New Jersey 610 Taylor Road Piscataway New Jersey 08854 United States

Department of Chemistry Maringá State University Avenida Colombo 5790 CEP 87020 900 Maringá Paraná Brazil

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

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry International Joint Research Laboratory of Nano Micro Architecture Chemistry College of Chemistry Jilin University 2699 Qianjin Street Changchun 130012 China

UFR Sciences et Techniques UMR CNRS 6230 Chimie et Interdisciplinarité Synthèse Analyse Modélisation Université de Nantes 2 Rue de la Houssinière BP 92208 Nantes 44322 Cedex 3 France

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