scispace - formally typeset
Search or ask a question
Author

J. E. Benson

Bio: J. E. Benson is an academic researcher. The author has contributed to research in topics: Spillover effect. The author has an hindex of 1, co-authored 1 publications receiving 125 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the role of water in the Pt-WO3 system was investigated and it was shown that if the WO3 was mixed with platinum black and also if water was preadsorbed on the mixture prior to admitting hydrogen to the system, the reduction did not take place at all at room temperature.
Abstract: It was found that yellow WOs could be reduced at room temperature by molecular hydrogen to form blue solids, the hydrogen analogs of tungsten bronzes with a molar composition of H0.35WO3. But this was possible only if the WO3 was mixed with platinum black and also if water was preadsorbed on the mixture prior to admitting hydrogen to the system. If either one of these conditions was not satisfied, reduction did not take place at all at room temperature. Additional observations of spillover in this and similar systems are reported in this paper. They throw more light on the role of water in the Pt— WO3 system, show the generality of the phenomenon and stress its importance in adsorption, solid state reactions and surface catalysis.

134 citations


Cited by
More filters
Journal ArticleDOI
10 Aug 1973-Science
TL;DR: Tungsten carbide catalyzes the formation of water from hydrogen and oxygen at room temperature, the reduction of tungsten trioxide by hydrogen in the presence of water, and the isomerization of 2,2-dimethylpropane to 2-methylbutane.
Abstract: Tungsten carbide catalyzes the formation of water from hydrogen and oxygen at room temperature, the reduction of tungsten trioxide by hydrogen in the presence of water, and the isomerization of 2,2-dimethylpropane to 2-methylbutane. This catalytic behavior, which is typical of platinum, is not exhibited at all by tungsten. The surface electronic properties of the latter are therefore modified by carbon in such a way that they resemble those of platinum.

1,738 citations

Journal ArticleDOI
TL;DR: Pd-functionalized nanostructures exhibited a dramatic improvement in sensitivity toward oxygen and hydrogen due to the enhanced catalytic dissociation of the molecular adsorbate on the Pd nanoparticle surfaces and the subsequent diffusion of the resultant atomic species to the oxide surface.
Abstract: The sensing ability of individual SnO2 nanowires and nanobelts configured as gas sensors was measured before and after functionalization with Pd catalyst particles. In situ deposition of Pd in the same reaction chamber in which the sensing measurements were carried out ensured that the observed modification in behavior was due to the Pd functionalization rather than the variation in properties from one nanowire to another. Changes in the conductance in the early stages of metal deposition (i.e., before metal percolation) indicated that the Pd nanoparticles on the nanowire surface created Schottky barrier-type junctions resulting in the formation of electron depletion regions within the nanowire, constricting the effective conduction channel and reducing the conductance. Pd-functionalized nanostructures exhibited a dramatic improvement in sensitivity toward oxygen and hydrogen due to the enhanced catalytic dissociation of the molecular adsorbate on the Pd nanoparticle surfaces and the subsequent diffusion ...

1,307 citations

Journal ArticleDOI
TL;DR: The hydrogen storage properties of MgH 2 are significantly enhanced by a proper engineering of the microstructure and surface as discussed by the authors, which gives remarkable improvement of absorption/desorption kinetics.

1,081 citations

Journal ArticleDOI
R. Prins1

792 citations

Journal ArticleDOI
TL;DR: A compositional encyclopedia of SACs is provided, celebrating the 10th anniversary of the introduction of this term, and examines the coordination structures and associated properties accessed through distinct single-atom-host combinations and relate them to their main applications in thermo-, electro-, and photocatalysis.
Abstract: Isolated atoms featuring unique reactivity are at the heart of enzymatic and homogeneous catalysts. In contrast, although the concept has long existed, single-atom heterogeneous catalysts (SACs) have only recently gained prominence. Host materials have similar functions to ligands in homogeneous catalysts, determining the stability, local environment, and electronic properties of isolated atoms and thus providing a platform for tailoring heterogeneous catalysts for targeted applications. Within just a decade, we have witnessed many examples of SACs both disrupting diverse fields of heterogeneous catalysis with their distinctive reactivity and substantially enriching our understanding of molecular processes on surfaces. To date, the term SAC mostly refers to late transition metal-based systems, but numerous examples exist in which isolated atoms of other elements play key catalytic roles. This review provides a compositional encyclopedia of SACs, celebrating the 10th anniversary of the introduction of this term. By defining single-atom catalysis in the broadest sense, we explore the full elemental diversity, joining different areas across the whole periodic table, and discussing historical milestones and recent developments. In particular, we examine the coordination structures and associated properties accessed through distinct single-atom-host combinations and relate them to their main applications in thermo-, electro-, and photocatalysis, revealing trends in element-specific evolution, host design, and uses. Finally, we highlight frontiers in the field, including multimetallic SACs, atom proximity control, and possible applications for multistep and cascade reactions, identifying challenges, and propose directions for future development in this flourishing field.

505 citations