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Carbon-incorporated metal nanoparticles are heat-treated in various gas atmospheres to create carbon shells with different porosity. A highly porous carbon shell is formed due to the carbon etching effect by H2, and the defect healing effect by CO is discovered through additional CO gas treatment of the H2/N2 gas-treated sample. [ABSTRACT FROM AUTHOR]

Invited for this issue's Front Cover are the groups of Kwang Bok Yi and Namgee Jung from Chungnam National University (South Korea). The Front Cover shows the catalyst structure that blocks O2 gas (red circles) penetration and selectively permeates H2 gas (blue circles) via the molecular sieve effect by the carbon shell coated on the metal surface to suppress reverse current flow under shut‐down/start‐up conditions during fuel cell operation. Read the full text of the Research Article at 10.1002/celc.202200342. [ABSTRACT FROM AUTHOR]

Carbon shell, carbon solubility, molecular sieve effect, reaction selectivity, reverse current flow Keywords: carbon shell; carbon solubility; molecular sieve effect; reaction selectivity; reverse current flow EN carbon shell carbon solubility molecular sieve effect reaction selectivity reverse current flow 1 1 1 09/15/22 20220913 NES 220913 B The Front Cover b shows the molecular sieve effect by the carbon shell coated on the metal surface. Front Cover: Carbon Shell-Encapsulated Metal Alloy Catalysts with Pt-Rich Surfaces for Selective Hydrogen Oxidation Reaction (ChemElectroChem 17/2022). [Extracted from the article]