Ultra‐Stable and High‐Cobalt‐Loaded Cobalt@Ordered Mesoporous Carbon Catalysts: All‐in‐One Deoxygenation of Ketone into Alkylbenzene

Abstract

Catalytic deoxygenation represents a straightforward and core methodology for fine‐chemical production and biomass upgrading. Generally, the application of homogeneous metal complexes or heterogeneous noble‐metal catalysts prevails in academia and the chemical industry. Herein, we introduce cobalt@ordered mesoporous carbon (Co@OMC) catalysts, which are constructed conveniently by a mechanochemical coordination self‐assembly based on a renewable tannin precursor. Importantly, the Co@OMC catalysts with a high loading of in situ confined Co species promote the selective deoxygenation of various ketones, aldehydes, and alcohols efficiently into the corresponding alkanes under mild conditions. Therefore, a simple, inexpensive, and heterogeneous catalyst for selective deoxygenation can be expected, meanwhile the solid‐state synthesis affords a green, rapid, and scalable pathway to Co@OMC catalysts.

Large‐Scale Production of Carbon‐Supported Cobalt‐Based Functional Nanoparticles for Oxygen Evolution Reaction

“…[22,23] Supported metal nanoparticles with uniform particle size distributions could be obtained via ordered mesoporous carbon materials due to pore confinement in their well-defined pore system, however, this requires multiple synthetic steps and several days of labwork. [24][25][26][27][28] Recently, the methods for the preparation of carbonsupported Co-based nanoparticles were extended by the simple pyrolysis of metal-organic frameworks (MOFs) as single precursors. [29][30][31] Although both of these approaches yield the desired highly dispersed small nanoparticles of the active species, the synthesis efforts are undeniable.…”

Recent Advances in the Marriage of Catalyst Nanoparticles and Mesoporous Supports

“…To address this issue, [ 91,92 ] Dai et al developed a mechanochemical assembly approach for the synthesis of Co nanoparticles in mesoporous carbon in the absence of solvents. [ 93 ] In this case, tannin (carbon source), triblock copolymers (structure‐directing agent), and Co(OAc) 2 were ball‐milled to form a mesostructured composite. A coordination polymer was formed by the self‐assembly of tannin and Co 2+ at the hydrophilic part of the block copolymer micelle.…”

Highly effective and chemoselective hydrodeoxygenation of aromatic alcohols

“…In comparison, less attention has been paid to chemoselective HDO of aromatic alcohols using non-noble metal-based catalysts. [36][37][38] The lower activity of non-noble metal catalysts oen leads to a high reaction temperature and pressure, which in turn probably deactivates the catalyst. Moreover, a limited range of substrates and unclear active sites under these conditions limit their practical applicability.…”