Microporous Channels Research Articles

Defective analcime/geopolymer composite membrane derived from fly ash for ultrafast and highly efficient filtration of organic pollutants

Nanofiltration membranes (NFMs) are of great interest for water purification attributed by their excellent performance, while the high fabrication cost greatly limits their use. Herein, an ultra-low-cost zeolite-based NFM was developed by a simple hydrothermal method using fly ash as the raw material and used for the high-efficiency filtration of organic pollutants from wastewater. The as-obtained zeolite membrane was composed of crystalline analcime (ANA) type zeolite and amorphous geopolymer (GP) composite. Benefiting from the defects introduced large cavities and microporous channels in ANA, the ANA/GP composite membrane with a thickness of ∼60 μm exhibited permeation rates as high as 340–440 L/(m2·h·MPa), and the rejection rates are up to 97 % towards methylene blue. Moreover, the fabrication cost of the ANA/GP membrane is only $31.8/m2, far lower than the reported efficient NFMs. The development of the ANA/GP-NFM paves the way for developing commercially applicable membranes for organics separation and water purification.

Proton-Conducting Humidity-Sensitive NiII-NbIV Magnetic Coordination Network.

The 2D coordination network (NH4)2[NiII(cyclam)]3[NbIV(CN)8]2·21H2O (1·21H2O) was obtained on a cation-assisted synthetic pathway. The reaction between [Ni(cyclam)]2+ and [Nb(CN)8]4- in the presence of excess of NH4Cl resulted in the formation of negatively charged coordination layers with the simultaneous incorporation of the NH4+ cations into the microporous channels of the structure. 1·21H2O network can be partly dehydrated in a single-crystal-to-single-crystal structural transformation to give (NH4)2[NiII(cyclam)]3[NbIV(CN)8]2·14H2O (1·14H2O). The dehydration-induced structural changes, in particular the deformation of CN--bridges and the disruption of interlayer interactions, give rise to the solvatomagnetic effect. Fully hydrated 1·21H2O phase is a ferrimagnet with a critical temperature of magnetic ordering of 7.6 K and a narrow magnetization hysteresis loop, while 1·14H2O hydrate is an antiferromagnet with Tc = 7.2 K and metamagnetic transition at 6.3 kOe. Thanks to the presence of the NH4+ ions in the structure, the proton conductivity of ∼4 × 10-5 S cm-1 (295 K, 100% relative humidity, RH) is observed with the activation energy of 0.80 eV.

A stable multifunctional cadmium-organic framework based on 2D stacked layers: Effective gas adsorption, and excellent detection of Cr3+, CrO42−, and Cr2O72-

Multifunctional metal-organic frameworks incorporated with different applications have drawn great attention in chemistry and material science. Herein, a new luminescent compound with 1D microporous channels, namely [Cd(OBA)(L1).0.75DMA]n (1, H2OBA = 4,4′-oxybis(benzoic acid), L1 = 4-amino-3,5-bis(4-pyridyl)-1,2,4-triazole), has been constructed and well explored, which features good thermal and chemical stability. The activated compound 1 with 10.2 Å channels calculated by HK method using N2 adsorption/desorption isotherms at 77 K, reveals a positive CO2 uptake capacity of 68.0 and 40.8 cm3 g−1 at 273 and 298 K, respectively, but it captures a relatively lower amount of CH4 gas under similar atmosphere. Meanwhile, the high H2 capture amount of compound 1 has been demonstrated with 165.2 cm3 g−1 (1.52%) at 1 atm, 77 K. Interestingly, this compound displays a prominently selective and sensitive response to Cr3+, CrO42−, and Cr2O72− in aqueous media. The detection limits of Cr3+, CrO42−, and Cr2O72− are calculated to be 10.25, 0.30, and 9.18 μM, respectively. Moreover, compound 1 can be easily regenerated and reused for detecting CrO42− and Cr2O72− at least three times. Remarkably, the test paper incorporated compound 1 can easily detect these three ions. All these results indicate that compound 1 is a multifunction material with potentials of CO2 selective adsorption and separation, high H2 uptake, high selectivity and sensitivity as well as excellent recyclability for Cr3+, CrO42−, and Cr2O72−.

Nitrogen-doped hierarchically porous carbon nanosheets derived from polymer/graphene oxide hydrogels for high-performance supercapacitors

Design and fabrication of the nitrogen-doped carbon materials with hierarchically porous structure is crucial for improving the electrochemical performance of supercapacitors. In this study, facile fabrication of the nitrogen-doped hierarchical carbon nanosheets (i.e. HGPC-A) is demonstrated via one-step carbonization and activation strategy using the polyvinyl alcohol/polyaniline (PVA/PANI) hydrogels as precursors in the presence of graphene oxide (GO). Benefiting from the covalent bonding assembly between GO and PVA/PANI polymers, the as-obtained HGPC-A with the hierarchical and interconnected nanosheet structure exhibits the high specific surface area and abundant macro-/meso-/micropore channels. It is also found that the introduction of the graphene has a significant effect on increasing the pyridinic-N ratio and enhancing the structural stability of HGPC-A in comparison to the pristine PVA/PANI hydrogel-derived carbon materials (HPC-A). Remarkably, these fascinating structure features of the HGPC-A enable the high charge storage performance as the electrode for supercapacitor, highlighted by a high specific capacitance of 311 F g−1 with superior rate capability of 64.3% when the current density increased from 0.5 A g−1 to 20 A g−1. Moreover, the integrated symmetric supercapacitor using the HGPC-A electrodes displays superb cycling durability of 88.5% over 10,000 cycles and high charge storage capacity of 7.0 Wh kg−1.

Devising Chemically Robust and Cationic Ni(II)-MOF with Nitrogen-Rich Micropores for Moisture-Tolerant CO2 Capture: Highly Regenerative and Ultrafast Colorimetric Sensor for TNP and Multiple Oxo-Anions in Water with Theoretical Revelation.

Metal-organic frameworks (MOFs) show distinctive superiority for carbon dioxide (CO2) capture and luminescent sensing of toxic pollutants over other materials, where combination of both of these properties together with improvement of hydrolytic stability and pore functionality is critical to environmental remediation applications. The Ni(II) framework [Ni2(μ2-OH)(azdc)(tpim)](NO3)·6DMA·6MeOH (CSMCRI-3) (tpim = 4,4',4″-(1H-imidazole-2,4,5-triyl)tripyridine, H2azdc = azobenzene-4,4'-dicarboxylic acid, DMA = dimethylacetamide, CSMCRI = Central Salt & Marine Chemicals Research Institute), encompassing cationic [Ni2(μ2-OH)(CO2)2] SBUs, is solvothermally synthesized from nitrogen-rich and highly fluorescent organic struts. The noninterpenetrated structure, containing free nitrogen atom affixed microporous channels, is stable in diverse organic solvents and weakly basic and acidic aqueous solutions. The activated MOF (3a) exhibits strong CO2-framework interaction and extremely selective CO2 adsorption over N2 (292.5) and CH4 (11.7). Importantly, water vapor exposure does not affect the surface area and/or multiple CO2 uptake-release cycles, signifying potential of the porous structure for long-term use under humid conditions. Aqueous-phase sensing studies illustrate extremely specific and ultrafast detection of explosive 2,4,6-trinitrophenol (TNP) via remarkable fluorescence quenching (KSV = 1.3 × 105 M-1), with a 0.25 ppm limit of detection (LOD). Furthermore, 3a serves as unique luminescent probe for highly discriminative and quick responsive detection of three noxious oxo-anions (Cr2O72-, CrO42-, MnO4-) in water via noteworthy turn-off responses and extreme low LODs (Cr2O72- 0.9; CrO42- 0.29; MnO4- 0.25 ppm). It is imperative to stress the outstanding reusability of the MOF toward multicyclic sensing of all four major water contaminants, alongside visible colorimetric changes upon individual analyte detection. Mechanistic insights in light of the electron transfer route together with density functional theory calculations portray the influence of pore functionalization in framework-analyte interactions, including alternation in energy levels, where varying degrees of contribution of energy transfer explicitly authenticates high quenching of the material.

An Integrated Structural Air Electrode Based on Parallel Porous Nitrogen-Doped Carbon Nanotube Arrays for Rechargeable Li-Air Batteries.

The poor discharge and charge capacities, and the cycle performance of current Li–air batteries represent critical obstacles to their practical application. The fabrication of an integrated structural air electrode with stable parallel micropore channels and excellent electrocatalytic activity is an efficient strategy for solving these problems. Herein, a novel approach involving the synthesis of nitrogen-doped carbon nanotube (N-CNT) arrays on a carbon paper substrate with a conductive carbon-black layer for use as the air electrode is presented. This design achieves faster oxygen, lithium ion, and electron transfer, which allows higher oxygen reduction/evolution reaction activities. As a result, the N-CNT arrays (N/C = 1:20) deliver distinctly higher discharge and charge capacities, 2203 and 186 mAh g−1, than those of active carbons with capacities of 497 and 71 mAh g−1 at 0.05 mA cm−2, respectively. A theoretical analysis of the experimental results shows that the parallel micropore channels of the air electrode decrease oxygen diffusion resistance and lithium ion transfer resistance, enhancing the discharge and charge capacities and cycle performance of Li–air batteries. Additionally, the N-CNT arrays with a high pyridinic nitrogen content can decompose the lithium peroxide product and recover the electrode morphology, thereby further improving the discharge–charge performance of Li–air batteries.

Modification of H-[B]-ZSM-5 zeolite for methanol to propylene (MTP) conversion: Investigation of extrusion and steaming treatments on physicochemical characteristics and catalytic performance

Abstract High-silica H-[B]-ZSM-5 zeolite was synthesized by a hydrothermal method and was then extruded by a conventional process. The influence of mesoporosity formation and acidity modification was investigated using extrusion and combined extrusion-steam treatment over the synthesized zeolite. The catalysts were characterized by BET, FE-SEM, TGA, PXRD and NH3-TPD techniques. The catalytic performance of the powder H-[B]-ZSM-5 (BZP), extruded (BZE) and steam-treated extruded (BZEH) samples was evaluated in the methanol to propylene (MTP) conversion reaction. The reactions were performed in a fixed-bed reactor at 480 °C using a feed containing a mixture of 50 wt% methanol in water with a methanol weight hourly space velocity (WHSV) of 0.9 h−1. The results showed that extrusion of H-[B]-ZSM-5 with alumina sol as a binder followed by steam-treatment led to the formation of narrow and uniform mesoporosity without severely destructing the crystal structure. The life time of the BZEH catalyst (750 h) was higher than that of BZE (520 h) and BZP (580 h) samples. This considerable enhancement of the lifetime could be attributed to the synergetic effect of extruding and steaming of H-[B]-ZSM-5 zeolite, leading to weakening of the acid sites strength and reduction of strong/weak acid sites ratio as well as formation of mesoporous structure, which are helpful for attenuating coke deposition in the micropore channels even at a high coking level. Besides, BZEH exhibited higher selectivity to propylene, butylenes and total light olefins, while its selectivity to C1–C4 alkanes and ethylene was relatively lower. The insights attained in this work would help to design a promising catalyst for methanol to propylene process.

Microporous core-shell Co11(HPO3)8(OH)6/Co11(PO3)8O6 nanowires for highly efficient electrocatalytic oxygen evolution reaction

Exploring high-efficient oxygen evolution reaction (OER) catalysts is critical for producing clean H2 fuel through water splitting. Co and P involved Co-Pi and cobalt phosphide OER catalysts attracted tremendous attention, while limited report on cobalt phosphite as an OER catalyst. Herein, a novel cobalt phosphite nanowires with microporous 1D channel have been succsessfully discovered with remarkable catalytic performance of a low overpotential of ˜340 mV and Tafel slope of 60 mV dec−1 at 10 mA cm−2 at pH 14. Through comprehensive structural characterization, the effective species has been clearly illustrated to be the in-situ formed heterostructural Co11(HPO3)8(OH)6/Co11(PO3)8O6 core-shell structure nanowires. This work fills the gap for exploring high efficient cobalt phosphites OER catalysts under akaline condition and paves the way for exploring novel high efficiency waster splitting catalysts.

Identification of the most active sites for tetrahydropyranylation in zeolites: MFI as a test case

Abstract Tetrahydropyranylation (THP) has been extensively studied experimentally with both Bronsted and Lewis acid-based catalysts, such as zeolites, considered. However, our atomic-level understanding of the underlying mechanisms of different types of catalytic sites remains limited, particularly regarding zeolites. Thus, we combined an experimental catalytic study with density functional theory (DFT) calculations to identify the active sites and corresponding reaction mechanism in MFI zeolite. Both experimental and computational data clearly show that Bronsted acid sites are more reactive than Lewis acid sites. Furthermore, calculated reaction barriers for Bronsted acid site catalysis (5 kcal mol−1) are much lower than those for the diffusion of bulky products in microporous channels (approximately 20 kcal mol−1). In full agreement with theoretical calculations, the results of Madon-Boudart test clearly show that the effect of diffusion on the H-MFI catalysts performance cannot be neglected even at low temperature. Therefore, the diffusion becomes the rate-determining step. Overall, our findings suggest that designing zeolites with improved THP catalysis performance requires focusing on acid zeolites with Bronsted acid sites of average strength with facilitated diffusion, e.g., due to auxiliary mesoporous system.

Restricting Polyoxometalate Movement Within Metal-Organic Frameworks to Assess the Role of Residual Water in Catalytic Thioether Oxidation Using These Dynamic Composites

Comprised of high valent metal centers connected via oxide bonds, polyoxometalates (POMs) have a rich history in redox reactions. These discrete metal oxide clusters often are immobilized on heterogeneous supports to increase stability and allow for recyclability for catalytic reactions. One such support is the metal–organic framework (MOF), NU-1000. When POMs are installed into NU-1000, they are first sited in the mesoporous channel. Upon application of heat and removal of some physisorbed water, the POMs migrate to the microporous channel, where some active sites are blocked by the MOF linkers, resulting in lowered catalytic activity. To restrict this movement from the mesopore, we report here the use of two MOFs, naphthalene dicarboxylate-modified NU-1000 (NU-1000-NDC) and NU-1008, as supports for the Keggin-type polyoxometalate (POM), H3PW12O40. Upon the application of heat, these frameworks were found to hinder or prevent the movement of the POM between channels by blocking the aperture(s) connecting the mesoporous and microporous channels. The composite POM@MOF materials were used for the oxidation of a mustard gas simulant, 2-cholorethyl ethyl sulfide, using H2O2 as the oxidant. The POM@MOF catalysts exhibit enhanced reactivity when compared to the POM or MOF alone, more than doubling the initial rates. The activity trend in PW12@NU-1000-NDC matched that in PW12@NU-1000, where the scCO2-activated sample poised the POM in the mesopores to give greater substrate accessibility and enhance the reaction rate compared to the heated sample where the POMs are poised in the micropores. Contrary to these observed trends, PW12@NU-1008 prohibits POM migration and performs superior when water has been removed at elevated temperatures as the active sites are more accessible in the mesoporous channel.

Engineering a platform for nerve regeneration with direct application to nerve repair technology

The development of effective treatment options for repair of peripheral nerves is complicated by lack of knowledge concerning the interactions between cells and implants. A promising device, the multichannel scaffold, incorporates microporous channels, aligning glia and directing axonal growth across a nerve gap. To enhance clinical outcomes of nerve repair, a platform, representative of current implant technology, was engineered which 1) recapitulated key device features (porosity and linearity) and 2) demonstrated remyelination of adult neurons. The in vitro platform began with the study of Schwann cells on porous polycaprolactone (PCL) and poly(lactide co-glycolide) (PLGA) substrates. Surface roughness determined glial cell attachment, and an additional layer of topography, 40 μm linear features, aligned Schwann cells and axons. In addition, direct co-culture of sensory neurons with Schwann cells significantly increased neurite outgrowth, compared to neurons cultured alone (naive or pre-conditioned). In contrast to the control substrate (glass), on porous PCL substrates, Schwann cells differentiated into a mature myelinating phenotype, expressing Oct-6, MPZ and MBP. The direct applicability of this platform to nerve implants, including its response to physiological cues, allows for optimization of cell-material interactions, close observation of the regeneration process, and the study of therapeutics, necessary to advance peripheral nerve repair technology.

Fully developed magnetohydrodynamics natural convection flow in a vertical micro-porous-channel with Hall effects

An exact solution is presented for the steady hydromagnetic fully developed natural convection flow in a vertical microporous channel due to asymmetric heating. The governing momentum and energy equations are presented in dimensionless form and solved analytically using the method of undetermined coefficient. The effects of Hall current and suction/injection parameters on the primary and secondary velocity, volume flow rates, and skin frictions are discussed with the help of line graphs and tables. It is observed that injection accelerates the flow, whereas suction retards the flow in both the primary and secondary flow directions.

Flexible Microporous Framework Based on Pb4 Clusters for Highly Selective Storage and Separation of Energy Gases

In this work, a microporous Pb(II)-based framework (FJI-H22) has been synthesized upon solvothermal reaction, which is constructed from two kinds of rarely seen tetranuclear Pb(II) clusters. FJI-H22 has two kinds of one-dimensional microporous channels (ca. 12.80 A × 15.08 and 6.05 A × 11.83 A) along the crystallographic b axis. Interestingly, when immersed in methanol FJI-H22 can undergo reverse single-crystal-to-single-crystal transformations to form FJI-H22-MeOH. In particular, high stability (stable up to 300 °C in atmosphere), large Brunauer–Emmett–Teller (BET) surface area (483 m2·g–1), and the nature of microporosity enable desolvated FJI-H22 to be a good candidate for purification of natural gas. As anticipated, desolvated FJI-H22 can selectively adsorb C2/C3 hydrocarbons over CH4 at 298 K and 1 bar. Furthermore, ideal adsorbed solution theory calculations reveal that FJI-H22 shows highly selective separation of higher hydrocarbons over CH4 under ambient conditions.

Numerical investigation of entropy generation in microporous channel with thermal radiation and buoyancy force

Microporous channels found to have extensive applications in many fields of engineering, particularly in thermal and petrochemical engineering. In particular, the microelectromechanical systems are useful to develop a large number of microscopic devices and systems such as micromixture, microheat exchangers, microchannel heat sinks, microfuel cells. The present work aims to scrutinize the combined effects of thermal radiation and buoyancy force on entropy generation in magneto-hydrodynamic Jeffrey fluid flow through a vertical microporous channel. The model equations of linear momentum and energy balance are developed and tackled numerically using fourth-order Runge–Kutta method. The results are exhibited pictorially and discussed quantitatively for active parameters which emerged in the mathematical formulation. Validation with previously published work is included, and the current results are in good agreement. It is found that the effects of viscous dissipation and suction/injection on entropy generation in microchannel are important and should not be ignored. Further, it is noticed that the fluid temperature retards with an increasing value of suction and the effect is reversed in the case of injection.

Application of a water stable zinc(II) glutamate metal organic framework for photocatalytic degradation of organic dyes

A water stable metal-organic framework (MOF) having structural formula {[Zn(H 2 O)(L)]∙xsolvent} n (L = glutamate) ( 1 ), was prepared in aqueous medium by simple mixing the Zn(II) salt and glutamate ligand at room temperature. The single crystal X-ray diffraction study indicates that 1 crystallizes in an orthorhombic system with a space group of P2 1 2 1 2 1 in which the Zn(II) center adopts pseudo-octahedral geometry. The bridging interactions through carboxylate groups in 1 generates a 2D structure in 1 comprising of the microporous channels. The UV/Vis diffuse-reflection spectroscopy for 1 had been performed which indicated that MOF possess semiconducting nature with a band gap of 3.23 eV and therefore may be a potential candidate as photocatalyst. The photocatalytic behavior of 1 against photo-degratdation of organic dyes has been investigated. The possible photocatalytic activity of 1 against organic dyes have been addressed using density of states (DOS) calculations. KEY WORDS : Glutamate, MOF, DOS, Photocatalysis Bull. Chem. Soc. Ethiop. 2019 , 33(1), 43-50 DOI: https://dx.doi.org/10.4314/bcse.v33i1.4

Cover Feature: Pt/ZSM‐22 with Partially Filled Micropore Channels as Excellent Shape‐Selective Hydroisomerization Catalyst (ChemCatChem 5/2019)

Cover Feature: Pt/ZSM‐22 with Partially Filled Micropore Channels as Excellent Shape‐Selective Hydroisomerization Catalyst (ChemCatChem 5/2019)

Microwave-Assisted Rapid Synthesis of Well-Shaped MOF-74 (Ni) for CO2 Efficient Capture.

In the present work, a series of MOF-74 (Ni) materials with narrow micropore channels and abundant unsaturated metal sites was respectively prepared via hydrothermal (HT), condensation reflux (CE), and microwave-assisted (MW) methods. The physicochemical properties of synthesized materials were characterized by powder X-ray diffraction, N2-sorption, field-emission scanning electron microscopy, Fourier-transform infrared (FTIR), thermogravimetric (TG)/TG-FTIR, X-ray photoelectron spectroscopy, UV-vis-near infrared, NH3/CO2-temperature programmed desorption, and in situ diffuse reflectance infrared Fourier transform spectroscopy. Their CO2/N2 adsorption performances were evaluated by isotherm adsorption and dynamic adsorption experiments. We found that the MW is a rapid and facile protocol for the synthesis of MOF-74 (Ni) materials with highly efficient CO2 capture capacity. The well-shaped MW-140 adsorbent with superior CO2 adsorption capacity of 5.22 mmol/g at 25 °C can be obtained within 60 min by the MW process, almost 6 times higher than that of the commercial activated carbon (0.89 mmol/g). Results of dynamic adsorption experiments showed that the MW-140 material possesses the highest CO2 adsorption capacity of 3.37 mmol/g under humid conditions (RH = 90%). Importantly, MW-140 has excellent adsorption stability and recyclability, superior CO2 capture selectivity (CO2/N2 = 31), and appropriate isosteric heat in CO2 adsorption (21-38 kJ/mol), making it a promising and potential material for industrial CO2 capture. Characterization results demonstrated that the high capture capability of MOF-74 (Ni) materials can be attributed to the synergistic effect of abundant narrow micropore channels and rich five-coordinated Ni2+ open metal sites which are beneficial for the trapping of CO2 molecules.

Incorporating Hierarchy into Conventional Zeolites for Catalytic Biomass Conversions: A Review

Zeolites are promising catalysts that are widely used in petrochemical, oil, and gas industries due to their unique characteristics, such as ordered microporous networks, good hydrothermal stability, large surface area, tunable acidity, and shape-selectivity. Nevertheless, the sole presence of microporous channels in zeolites inevitably restricts the diffusion of bulky reactants and products into and out of the microporous networks, leading to retarded reaction rates or catalyst deactivation. This problem can be overcome by developing hierarchical zeolites which involve mesoporous and macroporous networks. The meso- and macro-porosities can enhance the mass transport of molecules and simultaneously maintain the intrinsic shape selectivity of zeolite microporosity. Hierarchical zeolites are mainly developed through post-synthesis and pre-synthesis or in situ modification of zeolites. In this review, we evaluated both pre-synthesis and post-synthesis modification strategies with more focus on post-synthesis modification strategies. The role of various synthesis strategies on the intrinsic properties of hierarchical zeolites is discussed. The catalytic performance of hierarchical zeolites in important biomass reactions, such as catalytic pyrolysis of biomass feedstock and upgradation of bio-oil, has been summarized. The utilization of hierarchical zeolites tends to give a higher aromatic yield than conventional zeolites with microporosity solely.

MHD Convection Fluid and Heat Transfer in an Inclined Micro-Porous-Channel

Abstract This study is devoted to investigate the influence of transverse magnetic field as well as suction/injection on MHD natural convection flow of conducting fluid in an inclined micro-porous-channel. The analytical solutions for velocity profile and temperature profile have been obtained considering the velocity slip and temperature jump conditions at the micro-porous-channel walls. The solution obtained for the velocity has been used to compute the skin friction, while the temperature has been used to compute the Nusselt number. The effect of various flow parameters entering into the problem are discussed with the aid of line graphs. Results reveal that the impact of inclination angle on fluid velocity is dependent on the value of the wall ambient temperature difference ratio, hence increase in inclination angle yields an enhancement in fluid velocity within the micro-porous-channel for some selected values of the wall ambient temperature difference ratio whereas it displays a dual character for other values. Also, injecting through the micro-porous channel thickens the thermal boundary layer, resulting to weakening the convective current and consequently decreasing the fluid velocity whereas suction weakens the thermal boundary layer yielding an increase in fluid velocity.

Pt/ZSM‐22 with Partially Filled Micropore Channels as Excellent Shape‐Selective Hydroisomerization Catalyst

AbstractPt/ZSM‐22 with partially filled micropore channels (Pt/Z22‐PF) was prepared through a facile in‐situ coke deposition approach. Compared with conventional Pt/ZSM‐22 with evacuated micropore channels (Pt/Z22‐E), Pt/Z22‐PF exhibits much higher activity and isomer yield in n‐dodecane hydroisomerization. Specifically, the turnover frequency of n‐dodecane and the maximum multibranched isomer yield on Pt/Z22‐PF are about twice that on Pt/Z22‐E (314 vs. 144 h−1, 49 % vs. 29 %). Theoretical simulations and adsorption experiments demonstrate that the diffusion limitation of hydrocarbon and the accessibility of acid sites inside the micropore channels are reduced dramatically because of the partial fill. This is beneficial for the diffusion of alkene intermediates and the suppression of cracking reactions, resulting in a superior activity and high yield of isomers, especially multibranched isomers.