DataVXChemistry of MaterialsPaper
journal article·2019-11-12

Ligands Affect Hydrogen Absorption and Desorption by Palladium Nanoparticles

Noah J. J. Johnson, Brian Lam, Rebecca S. Sherbo, David K. Fork, Curtis P. Berlinguette

Chemistry of Materials· Volume 31· Issue 21
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Source abstract

Abstract

We report herein in situ X-ray diffraction experiments that show that surface ligands affect the rates of hydrogen absorption and desorption in octahedral palladium nanoparticles. This observation was made possible by: (i) using a UV-driven photolysis and ozonolysis treatment to convert the ligand-stabilized palladium nanoparticles to pristine (i.e., ligand-free) nanoparticles while maintaining the size and shape of the core; and (ii) tracking in situ the phase transformation under a hydrogen environment. Our experiments revealed that pristine nanoparticles absorb and desorb hydrogen 10-fold faster than the corresponding ligated samples. This finding is supported by comparing octahedral nanoparticles stabilized by two different types of ligand coatings that both show faster hydrogen absorption and desorption after ligand removal. The data indicate that in addition to nanoparticle shape, surface structuring, and size, the ligand shell must be taken into account when examining hydrogen absorption and desorption in palladium nanoparticles.
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Research context

Nanomaterials

OpenAlex topics: Electrocatalysts for Energy Conversion · Nanomaterials for catalytic reactions · Catalytic Processes in Materials Science

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada

Google LLC, 1600 Amphitheatre Parkway, Mountain View, California 94043, United States

Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada

Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver, British Columbia V6T 1Z4, Canada

Canadian Institute for Advanced Research (CIFAR), 661 University Avenue, Toronto, Ontario M5G 1M1, Canada

Funding

Canada Foundation for Innovation · Canada Research Chairs · Natural Sciences and Engineering Research Council of Canada · Canadian Institute for Advanced Research · Google

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