Atomic Layer Deposition of Platinum on Strontium Titanate Surfaces

نویسندگان

  • Jeffrey Elam
  • Bryan W. Berger
  • Jacinta C. Conrad
چکیده

Atomic Layer Deposition of Platinum on Strontium Titanate Surfaces Tremendous energy savings and environmental benefits are possible from improved catalysts for chemical manufacturing and emissions reduction. Breakthroughs in catalyst development will be enabled by precise methods for synthesizing nanostructured materials. Atomic layer deposition (ALD) is a thin film growth technique that is currently used by the microelectronics industry and offers great potential for synthesizing better catalysts. In this seminar I will present recent results from work at Argonne synthesizing, characterizing, and testing materials comprised of ALD platinum on strontium titanate surfaces as potential catalysts for reducing automotive emissions. We employ a variety of analytical techniques including scanningand transmission-electron microscopy, and synchrotron X-Ray scattering methods to understand the structure and composition of the platinum catalysts and also to explore the ALD growth behavior. Surprisingly, the ALD Pt consists of nearly monodispersed nanoparticles that decorate the strontium titanate and are highly active for hydrocarbon combustion.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Controlled growth of platinum nanoparticles on strontium titanate nanocubes by atomic layer deposition.

With an eye toward using surface morphology to enhance heterogeneous catalysis, Pt nanoparticles are grown by atomic layer deposition (ALD) on the surfaces of SrTiO(3) nanocubes. The size, dispersion, and chemical state of the Pt nanoparticles are controlled by the number of ALD growth cycles. The SrTiO(3) nanocubes average 60 nm on a side with {001} faces. The Pt loading increases linearly wit...

متن کامل

Controllable ALD synthesis of platinum nanoparticles by tuning different synthesis parameters

Pt nanoparticles were successfully deposited using three different atomic layer deposition (ALD) methods, e.g. AB­type, ABC­type and static ABC­type ALD, on two different types of strontium titanate nanocuboids (STO­NCs) samples in a reaction temperature window of 125 °C–300 °C. The influence of reaction temperature, number of ALD cycles, type of substrate, 2nd reagent and type of ALD method on...

متن کامل

Oriented catalytic platinum nanoparticles on high surface area strontium titanate nanocuboids.

Platinum nanoparticles grown on SrTiO(3) nanocuboids via atomic layer deposition exhibit cube-on-cube epitaxy with the predicted Winterbottom shape, consistent with literature values of the interfacial and surface free energies. This thermodyamically stable configuration should survive the rigors of catalytic conditions to create stable, high surface area, face-selective catalysts.

متن کامل

Nucleation and growth process of atomic layer deposition platinum nanoparticles on strontium titanate nanocuboids.

Uniform, well-dispersed platinum nanoparticles were grown on SrTiO3 nanocuboids via atomic layer deposition (ALD) using (methylcyclopentadienyl)trimethylplatinum (MeCpPt(Me)3) and water. For the first half-cycle of the deposition particles formed through two sequential processes: initial nucleation and growth. The final particle size after a single complete ALD cycle was dependent on the reacti...

متن کامل

NORTHWESTERN UNIVERSITY Atomically-Precise Synthesis of Platinum catalysts on Strontium Titanate using Atomic Layer Deposition A DISSERTATION SUBMITTED TO THE GRADUATE SCHOOL IN PARTIAL FULFILLMENT OF THE REQUIREMENTS For the degree DOCTOR OF PHILOSOPHY Field of Materials Science and Engineering By

................................................................................................................... 3 Acknowledgements....................................................................................................... 5 List of Figures........................................................................................................... 10 List of Tables....................

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2016