In Situ Implantation of Bi₂S₃ Nanorods into Porous Quasi-Bi-MOF Architectures: Enabling Synergistic Dissociation of Borohydride for an Efficient and Fast Catalytic Reduction of 4-Nitrophenol

Abstract

for the catalytic reduction of 4-NP, delivering a high turnover frequency (TOF) of 1.67 × 10 −4 mmol mg −1 min −1 and an extremely high normalized rate constant (k nor ) of 435298 s −1 g −1 . The kinetic analysis and electrochemical tests indicate that this catalytic hydrogenation reduction follows the Langmuir−Hinshelwood mechanism. This study enriches the synthetic strategy of MOF-based derivatives and offers a new catalytic platform for hydrogenation reduction reactions.

Deciphering the mechanistic insights of 4-nitrophenol reduction catalyzed by a 1D–2D Bi2S3 nanostructured catalyst

“…Bi 2 S 3 facilitates the generation of hydrogen species with the assistance of BH 4 − to form species (Bi–H), which further reacts with 4-NP to form 4-AP. 22 Here, the 1D–2D Bi 2 S 3 nanostructured catalyst offers abundant active sites, accelerated electron transfer, and facilitated active H* generation for 4-NP reduction.…”

“…7a). 22 The oxidation peaks for the H * ads and H * abs species appears within the ranges of −0.10-0.20 V and −0.40 to −0.20 V, respectively. 75 H * ads species is mainly present at the surface and physically adsorbed, while H * abs is the chemisorbed hydrogen species present inside the bulk structure of the material.…”

“…20 Among them, bismuth-containing chalcogenides have been investigated for many catalytic applications for various reasons, including their abundance, relatively non-toxic nature, affordability in production, stability, large surface area, and flexibility in size and shape, including 1D, 2D, and 3D morphologies. [21][22][23][24] Initially, the semi-metallic Bi nanoparticles were deemed a promising contender for catalyzing the reduction of 4-NP, but their easy aggregation significantly diminished their catalytic activity. 25 Hence, the rational design and synthesis of bismuth-based nanostructured catalysts other than Bi nanoparticles (NPs) with controlled morphologies are crucial for developing catalysts at reduced cost with improved catalytic performance.…”

“…For the heterogeneous catalytic reduction of 4-NP, surface-adsorbed hydrogen species play crucial roles. 22,26–28 The adsorption of active atomic hydrogen species (H*) onto the surface of a catalyst produced by reducing H + or H 2 O can enhance the catalyst's activity towards 4-NP hydrogenation. The catalyst that provides more active atomic hydrogen species (H*) favours the reaction.…”

Advancements of MOFs in the Field of Propane Oxidative Dehydrogenation for Propylene Production

“…A higher conversion rate indicates that the catalyst can more effectively promote the reaction while reducing side reactions and catalyst loss. The conversion rate can be determined using methods such as colorimetry [ 77 , 78 ], gas chromatography [ 79 , 80 , 81 ], and nuclear magnetic resonance [ 82 ]. TOF [ 83 ]: TOF refers to the number of reactant molecules converted per active site on the catalyst per unit time.…”