Carboxylic acid Functionalized Cage‐Type Mesoporous Silica FDU‐12 as Support for Controlled Synthesis of Platinum Nanoparticles and Their Catalytic Applications

Abstract

Carboxylic acid functionalized 3D cage-type mesoporous silica FDU-12 with high surface area and pore volume was synthesized by a one-pot co-condensation method and used as support to synthesize Pt nanoparticles (NPs). The uniformly distributed COOH groups in the cage can control the growth of Pt NPs with high dispersion (Pt@CF-12). Pt@CF-12 was used as catalyst for the hydrolysis of ammonia borane to generate H and for the reduction of 4-nitrophenol to 4-aminophenol. The catalyst exhibits higher catalytic activity (H generation rate of 17.8 L min ) and lower activation energy of 30.67 kJ mol compared with other Pt-based silica catalysts due to the small size of the Pt NPs (3.5 nm) and cage-type porous structure of the support, which allowed easy diffusion of reactants. Pt@CF-12 has excellent durability, since the support prevented NP aggregation and leaching of NPs during catalysis. Pt@CF-12 can convert 93 % of 4-nitrophenol to 4-aminophenol within 10 min.

Nanopore‐Supported Metal Nanocatalysts for Efficient Hydrogen Generation from Liquid‐Phase Chemical Hydrogen Storage Materials

“…The mesoporous silica materials, especially those with regular and well-defined mesoporous channels and large specific surface area, such as MCM-41, [169][170][171] KIT-6, [167] FDU-12, [168] and SBA-15, [14a,161-166,188] were also widely used as supports to encapsulate active metal species for the solvolysis of AB. Chen and co-workers prepared a series of bimetallic Cu-Ni NPs with different molar ratios of Cu/Ni immobilized in MCM-41 by using .…”

How to increase the catalytic efficacy of platinum‐based nanocatalysts for hydrogen generation from the hydrolysis of ammonia borane

“…A noticeable enhancement in catalytic activity has been reported when platinum(0) NPs were encapsulated in the hollow mesoporous silica (h‐mNSiO 2 ) 45 . Supporting the platinum(0) NPs on CF‐12 (carboxylic acid functionalized 3D cage‐type silica) does not improve the catalytic efficacy in the hydrolysis of AB either 46 . Although titania of both anatase and rutile structures provides low activity for platinum(0) NPs for releasing H 2 gas from the hydrolysis of AB 44 the platinum(0) NPs, deposited on 3D TiO 2 nanonetwork by ALD, have high activity and durability in the hydrolysis of AB (Table 2).…”

“…45 Supporting the platinum(0) NPs on CF-12 (carboxylic acid functionalized 3D cage-type silica) does not improve the catalytic efficacy in the hydrolysis of AB either. 46 Although titania of both anatase and rutile structures provides low activity for platinum(0) NPs for releasing H 2 gas from the hydrolysis of AB 44 the 1A,B of the 2018 paper. 27 HAADF-STEM images and corresponding particle size distributions of A, the in situ prepared Pt/CNT (1.5 wt.…”

In situ Polymerized FDU‐12/Poly(methyl methacrylate) and FDU‐12/polyamide 6 Nanocomposites for Cd2+ Adsorption

“…To date, several conventical ordered MSMs, i.e., FDU‐12, SBA‐15, SBA‐16, MCM‐41, MCM‐48, KIT‐5, and KIT‐6, have been reported. Among them, ordered FDU‐12 possesses a larger pore size (up to 10 nm) which can make it a suitable choice for adsorption application because compared to the conventional above‐mentioned ordered MSMs containing smaller pores (mainly 2–5 nm) that undergo the pore blockage phenomenon during the surface functionalization process with silane coupling agents, in FDU‐12 the size and volume of the pores will still be significant 23, 24.…”