TY - JOUR

T1 - Efficient Catalytic Microreactors with Atomic-Layer-Deposited Platinum Nanoparticles on Oxide Support

AU - Rontu, Ville

AU - Selent, Anne

AU - Zhivonitko, Vladimir V.

AU - Scotti, Gianmario

AU - Koptyug, Igor V.

AU - Telkki, Ville Veikko

AU - Franssila, Sami

N1 - Publisher Copyright: © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2017/11/27

Y1 - 2017/11/27

N2 - Microreactors attract a significant interest for chemical synthesis due to the benefits of small scales such as high surface to volume ratio, rapid thermal ramping, and well-understood laminar flows. The suitability of atomic layer deposition for application of both the nanoparticle catalyst and the support material on the surfaces of channels of microfabricated silicon microreactors is demonstrated in this research. Continuous-flow hydrogenation of propene into propane at low temperatures with TiO2-supported catalytic Pt nanoparticles was used as a model reaction. Reaction yield and mass transport were monitored by high-sensitivity microcoil NMR spectroscopy as well as time-of-flight remote detection NMR imaging. The microreactors were shown to be very efficient in propene conversion into propane. The yield of 100 % was achieved at 50 °C with a reactor decorated with Pt nanoparticles of average size of roughly 1 nm and surface coverage of 3.2 % in 20 mm long reaction channels with a residence time of 1100 ms. The activity of the Pt catalyst surfaces was on the order of several to tens of mmol s−1 m−2.

AB - Microreactors attract a significant interest for chemical synthesis due to the benefits of small scales such as high surface to volume ratio, rapid thermal ramping, and well-understood laminar flows. The suitability of atomic layer deposition for application of both the nanoparticle catalyst and the support material on the surfaces of channels of microfabricated silicon microreactors is demonstrated in this research. Continuous-flow hydrogenation of propene into propane at low temperatures with TiO2-supported catalytic Pt nanoparticles was used as a model reaction. Reaction yield and mass transport were monitored by high-sensitivity microcoil NMR spectroscopy as well as time-of-flight remote detection NMR imaging. The microreactors were shown to be very efficient in propene conversion into propane. The yield of 100 % was achieved at 50 °C with a reactor decorated with Pt nanoparticles of average size of roughly 1 nm and surface coverage of 3.2 % in 20 mm long reaction channels with a residence time of 1100 ms. The activity of the Pt catalyst surfaces was on the order of several to tens of mmol s−1 m−2.

KW - atomic layer deposition

KW - flow chemistry

KW - hydrogenation

KW - nanoparticles

KW - remote detection nmr

KW - HETEROGENEOUS HYDROGENATION

KW - HYDROGEN-INDUCED POLARIZATION

KW - FLOW

KW - PAIRWISE

KW - HIGH-RESOLUTION NMR

KW - ON-A-CHIP

KW - PROPENE HYDROGENATION

KW - MICROMIXER

KW - SPECTROSCOPY

KW - PARAHYDROGEN-INDUCED POLARIZATION

UR - http://www.scopus.com/inward/record.url?scp=85033434421&partnerID=8YFLogxK

U2 - 10.1002/chem.201703391

DO - 10.1002/chem.201703391

M3 - Article

C2 - 28902425

AN - SCOPUS:85033434421

VL - 23

SP - 16835

EP - 16842

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

SN - 0947-6539

IS - 66

ER -