12.2.2. Four-Wave Mixing (FWM) 4849 12.2.3. Dye Aggregation 4850 12.2.4. Optoelectronic Nanodevices 4850 12.3. Sensor 4851 12.3.1. Chemical Sensor 4851 12.3.2. Biological Sensor 4851 12.4. Catalysis 4852 13. Conclusion and Perspectives 4852 14. Abbreviations 4853 15. Acknowledgements 4854 16. References 4854 * Corresponding author E-mail: tpal@chem.iitkgp.ernet.in. † Raidighi College. § Indian Institute of Technology. 4797 Chem. Rev. 2007, 107, 4797−4862

Interparticle Coupling Effect on the Surface Plasmon Resonance of Gold Nanoparticles: From Theory to Applications

https://web.iitd.ac.in/~arunku/files/CEL311_Y13/Adsorption%20Theory%20to%20practice_Dabrowski.pdf

Adsorption — from theory to practice

Ultrathin metal films and particles on oxide surfaces: structural, electronic and chemisorptive properties

We present a scalable wet chemical synthesis for a catalytically active nanostructured amorphous molybdenum sulfide material. The catalyst film is one of the most active nonprecious metal materials for electrochemical hydrogen evolution, drawing 10 mA/cm2 at ∼200 mV overpotential. To identify the active phase of the material, we perform X-ray photoelectron spectroscopy after testing under a variety of conditions. As deposited, the catalyst resembles amorphous MoS3, but domains resembling MoS2 in composition and chemical state are created under reaction conditions and may contribute to this material’s high electrochemical activity. The activity scales with electrochemically active surface area, suggesting that the rough, nanostructured catalyst morphology also contributes substantially to the film’s high activity. Electrochemical stability tests indicate that the catalyst remains highly active throughout prolonged operation. The overpotential required to attain a current density of 10 mA/cm2 increases by o...

Amorphous Molybdenum Sulfide Catalysts for Electrochemical Hydrogen Production: Insights into the Origin of their Catalytic Activity

Determination of pore size and pore size distribution: 1. Adsorbents and catalysts

The fractal approach to heterogeneous chemistry

Interactions of SO2 with sodium deposited on silica

Interactions of NO and SO2 with iron deposited on silica

The interaction of SO2 with iron-covered CaO(100) at 373, 473, and 673 K was studied using X-ray photoelectron spectroscopy (XPS). Iron was deposited onto a CaO(100) surface in the metallic form; however, at lower iron coverages, other forms of iron relative to the metallic form were present. Scanning auger mapping analysis showed a random distribution of iron on CaO at both low iron coverage and high iron coverage. The adsorbed sulfur at 373 K on pure CaO and at low iron coverages was identified as sulfite. At high iron coverages, both sulfide and sulfite were identified. The sulfite formation was higher at low iron coverage than on pure CaO, but it decreased with increasing iron coverage. It was found that the iron sites at high iron coverage were blocking the active sites on the CaO surface; the reactivity at high coverage was similar to that of pure metallic iron. Sulfide formation increased with increasing iron coverage. Similar observations were made at 473 K, but the reactivity on iron at high coverage was considerably lower than that at 373 K. The total sulfur adsorbed was observed to be higher for all iron coverages at 373 K than for pure CaO. At 673 K, the reactivity on iron-covered surfaces was lower than that at either 373 or 473 K. However, the reactivity of iron-covered CaO was more than pure CaO at 673 K.

Jason M Cook

Papers

The fractal approach to heterogeneous chemistry

Interactions of SO2 with sodium deposited on silica

Interactions of NO and SO2 with iron deposited on silica

Interaction of SO2 with iron deposited on CaO(100)

Interactions of NO with iron deposited on alumina