Cheng-Yu Wang

National Yang Ming Chiao Tung University · Department of Materials Science and Engineering

Hydrogen spillover to the Cu-TDPAT (TDPAT = 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine) metal–organic framework is probed with adsorption measurements, ex situ characterization techniques, and density functional theory (DFT) calculations. At 1 bar and 300 K, hydrogen chemisorption to Pt/AC/Cu-TDPAT exceeds that expected for physisorption...

The principal obstacle to the implementation of a hydrogen-based economy remains storage under ambient conditions of temperature and pressure. While most approaches to this problem have to date focused on physisorption, wherein useful uptake is realized only at low temperatures (e.g., 77 K), recent experiments have suggested the possibility of chem...

The present study established a time-saving technique for hydrogen uptake measurements using a high-pressure thermo-gravimetric analyzer (HPTGA). The critical buoyancy effects were considered in the analysis model. The HPTGA technique developed here for metal–organic frameworks (MOFs) was validated through independent experiments. The room temperat...

Lithium metal is considered a promising anode material due to its high theoretical capacity and low redox potential. However, after repeated charging and discharging, the lithium metal electrode tends to...

Compared to other known materials, metal–organic frameworks (MOFs) have the highest surface area and the lowest densities; as a result, MOFs are advantageous in numerous technological applications, especially in the area of photocatalysis. Photocatalysis shows tantalizing potential to fulfill global energy demands, reduce greenhouse effects, and re...

In this work, lithium borohydride (LiBH4) was loaded into plasma-activated nanoporous few-layer graphene (FLG) powders with different specific surface areas (∼400-800 m2/g) and functional groups (carboxyl and amine) to investigate the effect of LiBH4@FLG nanoconfinement on the dehydrogenation properties. It was observed that the dehydrogenation tem...

Metal-organic framework (MOF)-derived carbons have attracted great interest in recent years by virtue of their fascinating material properties, such as mesoporous structures, high electron conductivity and great chemical stability. By coupling the MOF-derived carbons with other functional materials, it is possible to tailor the resulting materials...

Dear colleagues, This Special Issue will highlight the execution of nanostructured materials for energy storage in the field of engineering, medicine, nanotechnology, physics and chemistry. The aim of this Special Issue is to explore the scientific, technical and engineering challenges we face in the transition from nonrenewable energy sources to r...

A facile method for preparing hierarchical carbon composites that contain activated carbon (AC), carbon nanospheres (CNSs), and carbon nanotubes (CNTs) for use as the electrode material in supercapacitors (SCs) was developed. The CNS/CNT network enabled the formation of three‐dimensional conducting pathways within the highly porous AC matrix, effec...

Excess carbon dioxide emission accompanied by gross fossil fuel consumption has worsened the global warming crisis in recent decades. Photo-induced conversion of CO2 into hydrocarbons is a potential solution to mitigate both energy and environmental problems. However, conventional photocatalysts suffer low efficiency in CO2 conversion with often C1...

This Research Topic aims to focus on new advanced materials used for the production and storage of hydrogen and utilization in various advanced applications.

Despite the remarkable progress in perovskite photovoltaics, the development of high-performance and stable perovskite devices based on low-bandgap mixed lead (Pb)-tin (Sn) halide remains highly challenging. Here we present a...

Polymers of Intrinsic Microporosity (PIM-1) (Figure 1) are a unique class of organic polymers which are porous because of the presence of a spiro centre that prevents rotation of polymer chain which causes them to possess internal free volume (IFV) 1. PIM-1 are unique compared to other porous carbon nanostructures because of the presence of regular...

The pore characterization of ZIF system using small‐angle X‐ray scattering (SAXS) technique is presented for the first time. The pore characterization of ZIF‐67 framework structure as model system using the conventional nitrogen adsorption and SAXS methods was performed in this work. The comparison between the results obtained by two methods can pr...

A nanoporous and large surface area (∼800 m²/g) graphene-based material was produced by plasma treatment of natural flake graphite and was subsequently surface decorated with platinum (Pt) nano-sized particles via thermal reduction of a Pt precursor (chloroplatinic acid). The carbon-metal nanocomposite showed a ∼2 wt.% loading of well-dispersed Pt...

Microporous materials exhibit fast CO2 adsorption rate with possible sacrificed capacity, while CO2 chemisorption on metal oxides is remarkable but kinetics and reactive area are critical. In order to adopt the advantages of both microporous sorbent zeolitic imidazolate frameworks (ZIF) and metal oxide (MO), in this research, magnesium oxide (MgO)...

Cubic-phase Li7La3Zr2O12 (LLZO) garnet is a promising solid electrolyte candidate for next-generation Li batteries. As a viable approach, the desired cubic-phase formation of LLZO relies on elemental doping. In this regard, various dopants such as Al and Ga are doped into the LLZO samples, which are synthesized using a solid-state reaction method....

Chemical hydride ammonia borane (AB, NH3BH3) draws attentions as a hydrogen storage medium for its high hydrogen capacity (19.6 wt%) and good thermal stability at ambient environments. However, high hydrogen generation temperatures and slow kinetics limit AB practical applications. One way to overcome the obstacles is the nanoconfinement effect: AB...

MgO-loaded ZIF-8 catalysts ([email protected]) with various MgO loadings were prepared and characterized using atomic absorption spectroscopy (AAS), powder X-ray diffraction (PXRD), Fourier-transform infrared spectroscopy (FT-IR), N 2 sorption isotherms, field-emission transmission electron microscopy (FE-TEM), and thermogravimetric analysis (TGA)....

Carbon-based materials, such as amorphous activated carbons, ordered mesoporous carbons and more recently 3-D graphene-based structures, have attracted significant attention as efficient adsorbents, electrodes and membranes for emerging energy- and environmentally-oriented applications including hydrogen storage, supercapacitor energy storage and s...

Welcome to the 85th workshop of the International Union for Vacuum Science, Technique and Applications (IUVSTA). The aim of the IUVSTA workshop on “Nanoporous Materials for Green Energy Conversion and Storage” is to address issues and challenges regarding the implementation of nanoporous materials, such as carbons, metals, polymers, metal-organic f...

Hydrogen spillover refers to catalytic dissociation of hydrogen molecules followed by surface diffusion to the catalytic support. This mechanism has been proposed as a means to initiate hydrogen storage at ambient temperature. When catalytic dissociation of hydrogen is used to initiate room temperature hydrogen storage, this initiates weak chemisor...

For the first time, we functionalized the gate-opening metal-organic framework (GO-MOF) of MIL-53(Al) with ammonia borane (AB, NH3BH3) via post-synthesis method. In this report, unusual structural breathing and dehydrogenation behaviors of AB doped MOF (MIL-53-AB) were discovered. Surface coating triggered the GO-MOF breathing phenomenon and opened...

The superplasticity of ZK60 alloy was investigated after thermomechanical treatments (combination of rolling at 473 K and 673 K). ZK60 alloy, with an equiaxial grains microstructure (average grain size 2.6 µm), showed a maximum elongation of 865.2% with the strain rate 1 © 10¹⁴ s¹¹ under high temperature tensile test at 573 K. Surprisingly, hot-rol...

Hydrogen released from chemical hydride ammonia borane (AB, NH3BH3) can be greatly improved when AB is confined in metal-organic frameworks (MOFs), showing reduced decomposition temperature and suppressed unwanted byproducts. However, it is still debatable whether the mechanism of improved AB dehydrogenation is due to catalysis or nanosize. In this...

This study demonstrates that the hydrogen storage rate (HSR) of nanoporous carbon supported platinum nanocatalysts (NC) is determined by their heterojunction and geometric configurations. The present NC is synthesized in an average particle size of ~1.5 nm by incipient wetness impregnation of Pt4+ at carbon support followed by annealing in H2 ambie...

Development of an oxygen selective adsorbent is anticipated to reduce the material and energy requirements for adsorptive separations of air by a factor of four, due to the relative concentrations of N2 and O2 in air, thereby decreasing the parasitic energy losses, carbon dioxide emissions, and cost of oxygen purification via pressure-swing adsorpt...

Flexible gate-opening metal organic frameworks (GO-MOFs) expand or contract to minimize the overall free energy of the system upon accommodation of an adsorbate. The thermodynamics of the GO process are well described by a number of models, but the kinetics of the process are relatively unexplored. A flexible GO-MOF, RPM3-Zn, exhibits a significant...

In situ Fourier-transform infrared (FTIR) spectroscopy is able to probe structural defects via site-specific adsorption of CO to the Cu-BTC (BTC = 1,3,5-benzenetricarboxylate) metal-organic framework (MOF). The temperature-programmed desorption (TPD) of CO chemisorbed to Cu-TDPAT (TDPAT = 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine) is vir...

High pressure adsorption measurements for light gases on volumetric equipment are prone to error. Differential units reduce the sensitivity to leakage, gas compressibility, and temperature gradients, but remain highly sensitive to volume uncertainties, the calibration of which is difficult in the presence of low-density, microporous samples. Calibr...

There are two regimes that exhibit two distinctive behaviors of spillover. The present study used small-angle X-ray scattering (SAXS) to measure size distribution of Pt nanoparticles in the bulk Pt-impregnated active carbon sample. The peak position of the size distribution as determined by SAXS turns out to be at 1 nm, which is rarely discussed in...

The metal-organic frameworks (MOF) with low and medium specific surface areas (SSA) were shown to be able to adsorb hydrogen via bridged spillover at room temperature (RT) up to an amount of full coverage of hydrogen in the MOF. Anomalous small-angle X-ray scattering was employed to investigate the key relationship between the structures and storag...

The nano-sized carbon materials produced during the metal dusting process of 304L stainless steel were studied in this investigation. In the reaction atmosphere of CO/CO2 (35:1) mixed gas, the nano-fibers and multi-wall carbon nano-tubes (MWCNTs) could be obtained at 500ºC and 600ºC, respectively. Hydrogen storage performance of the MWCNTs was eval...

MOF-5-like crystals were studied by small-angle X-ray scattering (SAXS) to reveal, both quantitatively and qualitatively, their real structural details, including pore surface characteristics, pore shape, size distribution, specific surface area (SSA), spatial distribution, and pore-network structure. A combined SAXS and wide-angle X-ray scattering...

Objectives Synthesize designer microporous metal-organic • frameworks (MMOFs) mixed with catalysts to enable H-spillover for H 2 storage at 300 K to 400 K and moderate pressures. Adapted volumetric measurements to enable rapid • screening tests (RSTs) at high-pressure, towards Go/No-Go decision point. Validate RSTs against published activated carbo...