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Highly dispersed palladium nanoclusters (Pd NCs) immobilized by a nitrogen (N)-functionalized porous carbon support (N-MSC-30) are synthesized by a wet chemical reduction method, wherein the N-MSC-30 prepared by a tandem low-temperature heat-treatment approach proved to be a distinct support for stabilizing the Pd NCs. The prepared Pd/N-MSC-30 shows extremely high catalytic activity and recyclability for the dehydrogenation of formic acid (FA), affording the highest turnover frequency (TOF = 8414 h–1) at 333 K, which is much higher than that of the Pd catalyst supported on the N-MSC-30 prepared via a one-step process. This tandem heat-treatment strategy provides a facile and effective synthetic methodology to immobilize ultrafine metal NPs on N-functionalized carbon materials, which have tremendous application prospects in various catalytic fields.

Emerging as a new family of hybrid crystalline materials, bimetallic porous metal–organic frameworks (MOFs) have received great attention in gas storage and separation. We present a critical perspective on the construction of bimetallic MOFs, involving one-step synthesis and postsynthetic modification, and their applications in gas storage and separation. In particular, several examples of bimetallic MOFs have been provided to better understand of why such MOFs are so unique for these applications. We hope that the present perspective will inspire chemists working in this area to rationally design/develop new bimetallic MOFs for advanced applications.