A boron-doped carbon aerogel-supported Cu catalyst for the selective hydrogenation of dimethyl oxalate

Abstract

The modification of B in carbon support can modulate the hydrogenation selectivity.

Amorphous Boron Dispersed in LaCoO3 with Large Oxygen Vacancies for Efficient Catalytic Propane Oxidation

“…On the whole, the total acidic amount of boron‐containing LaCoO 3 is 2–4 fold that of pristine LaCoO 3 . Specifically, boron acts as electron acceptor for Lewis acids, and metal ions also have a strong ability to obtain electrons [39] . Strong acidity is helpful for the adsorption of C 3 H 8 and activation of C−H bond [40]…”

Advanced Carbon‐Based Nanocatalysts and their Application in Catalytic Conversion of Renewable Platform Molecules

“…Metal-N species [27,30,40,[44][45][46][47]128] Regulate acid site [28] Change reduction state [35,42] Improve hydrophilicity [28] Increase alkalinity of site [12,23,27,34,45,130] Interaction between metal and N [26,30] Increase the adsorption of substrate [33] Improve metal dispersion [24,25,27,29,31,32,35,36,40,44,45,48] Pyrolysis Similar to N, S doping, B atoms can also be easily incorporated into the carbon skeleton due to its comparable atomic size with carbon. [57,[62][63][64][65][66][67][68] The role of B is basically to form a strong interaction with the metal, thus affecting the electronic and geometric state of the metal (Table 2). [57,62,[63][64][65]…”

“…Adjust the S-containing precursor Change calcination temperature B Improve metal dispersion and stability [57,[62][63][64][65][66][67][68]73] Regulate electronic structure of metal [63,65,67,71] Regulate acid site [64,65] Regulate the adsorption/desorption strength of substrate/ intermediate [57,62,65] Change reduction state [64,65,67] Pyrolysis of B-containing precursor Chemical vapor deposition Adjust the P-containing precursor Change processing time Change calcination temperature P Metal-P species [70,72] Regulate acid site [50] Improve metal dispersion and stability [57,61,72,75] Regulate the affinity between carbon matrix and metal precursors [61] Regulate electronic structure of metal [71] Regulate the adsorption/desorption strength of substrate/ intermediate [60,76] Pyrolysis of P-containing precursor Phosphoric acid pretreatment Adjust the P-containing precursor Change calcination temperature (Table 3) are of significance in a diverse range of applications, which is worthy of more efforts and breakthroughs.…”

Catalytic Hydrogenation of Methyl Acetate to Ethanol over Boron Doped Carbon Aerogels Supported Cu Catalyst

“…Moreover, due to its less valence electrons than carbon, hetero boron atom can play the part of electron acceptor, which can effectively adjust acid-base distribution on catalyst surface. [31] Chen [32] et al demonstrated that doping boron would enhance the electron transfer from support to the gold clusters, thus improved the catalyst activity. Chen [33] et al concluded that the strengthened interaction between copper and CA originated from boron doping improved the ratio of Cu + /(Cu + + Cu 0 ), further enhancing EtOH selectivity.…”

“…Boron is considered as an ideal dopant due to its similar atomic radius as carbon. Moreover, due to its less valence electrons than carbon, hetero boron atom can play the part of electron acceptor, which can effectively adjust acid‐base distribution on catalyst surface . Chen et al.…”