A Comparison of Hydrogen Storage in Pt, Pd and Pt/Pd Alloys Loaded Disordered Mesoporous Hollow Carbon Spheres

Abstract

Comprehensive study to evaluate the ability of hydrogen uptake by disordered mesoporous hollow carbon spheres doped witch metal such as Pt, Pd or Pt/Pd was conducted. They were synthesized facilely using sonication and then calcination process under vacuum at the temperature of 550 °C. The effect on hydrogen sorption at neat-ambient conditions (40 °C, up to 45 bar) was thoroughly analyzed. The results clearly revealed that metal functionalization has a significant impact on the hydrogen storage capacity as the mechanism of gas uptake depends on two factors: metal type and certain size of particles. Thus, functionalized spheres adsorb hydrogen by physisorption forming metal hydrides or metal hydrides combined with hydrogen spillover effect. As a result, a sample with narrower distribution of nanoparticles and smaller specific size exhibited enhanced hydrogen uptake.

Carbon-Based Nanomaterials in Sensors for Food Safety

“…Compared with mesoporous silicon materials, mesoporous carbon materials have several special excellent properties, such as high specific surface area and porosity, adjustable pore size, controllable pore wall composition and structure, simple synthesis, and a lack of physiological toxicity. At the same time, high thermal and hydrothermal stability and extremely large specific surface area and pore volume can be obtained by optimizing and controlling the synthesis conditions, thus making this type of material very promising for a wide range of applications, including in adsorbent carriers [20,36], catalyst supports [37,38,39], hydrogen storage materials [40,41,42], and electrode materials [43,44,45].…”

“…The synthesis of OMC is usually performed by the hard template method using mesoporous silica molecular sieves as a template, selecting a suitable precursor and carbonating the precursor in the pore of the mesoporous template with subsequent etching of the mesoporous silica template using NaOH or HF solutions [55,56]. Mesoporous carbon materials have a wide range of applications in material synthesis [57], catalyst carrier, adsorption separation [42,58,59], and electronic devices [60]. Cui and coworkers fabricated a novel aptasensor using a sulfur nitrogen codoped OMC (SN-OMC) and thymine-Hg 2+ -thymine mismatch structure, which has a fine linear correlation for Hg 2+ (0.001–1000 nM) with a detection limit (LOD) of 0.45 pM [61] (Figure 1a).…”

Nonsiliceous Mesoporous Materials: Design and Applications in Energy Conversion and Storage

“…Mesoporous materials are naturally suitable for the physical storage of H 2 molecules . The high specific surface area and large total volume of mesopores can physically accommodate hundreds of gaseous H 2 molecules, and components of the materials can chemically bind with the H 2 molecules.…”

“…Ordered mesoporous carbon has been applied for H 2 storage. The carbon materials were further doped or modified with various metals to achieve a high H 2 absorption capacity and moderate dehydrogenation/rehydrogenation (deH/reH) conditions . Both the metal type and particle size can influence the H 2 storage capacity, and the H 2 uptake increases as the distribution of the NP size increases and the specific size decreases …”

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“…Palladium (Pd) and Platinum (Pt) nanoparticles (NPs) are widely exploited to design and fabricate nanostructured innovative sensing, catalyst, electronic, energy production and storage devices [1][2][3][4][5][6][7][8]. From a general point of view, this type of nano-system captures great interest due to size-dependent structure and properties, high specific surface area and reactivity.…”