Active Site and Electronic Structure Elucidation of Pt Nanoparticles Supported on Phase-Pure Molybdenum Carbide Nanotubes

Tan, Shuai; Wang, Lucun; Saha, Shibely; Fushimi, Rebecca R.; Li, Dongmei

doi:10.1021/acsami.7b01217

Title: Active Site and Electronic Structure Elucidation of Pt Nanoparticles Supported on Phase-Pure Molybdenum Carbide Nanotubes

Journal Article · 05 March 2017 · ACS Applied Materials and Interfaces

DOI: https://doi.org/10.1021/acsami.7b01217 · OSTI ID:1469194

Tan, Shuai ^[1];

^[2]; Saha, Shibely ^[3];

^[2];

^[1]

Univ. of Wyoming, Laramie, WY (United States); Center for Advanced Energy Studies, Idaho Falls, ID (United States)
Idaho National Lab. (INL), Idaho Falls, ID (United States); Center for Advanced Energy Studies, Idaho Falls, ID (United States)
Univ. of Wyoming, Laramie, WY (United States)

Here, we recently showed that phase-pure molybdenum carbide nanotubes can be durable supports for platinum (Pt) nanoparticles in hydrogen evolution reaction (HER). In this paper we further characterize surface properties of the same Pt/β-Mo₂C catalyst platform using carbon monoxide (CO)-Pt and CO-Mo₂C bond strength of different Pt particle sizes in the <3 nm range. Results from diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and temporal analysis of products (TAP) revealed the existence of different active sites as Pt particle size increases. Correlation between the resultant catalyst activity and deposited Pt particle size was further investigated using water–gas-shift (WGS) as a probe reaction, suggesting that precise control of particle diameter and thickness is needed for optimized catalytic activity.

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Research Organization:: Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC07-05ID14517

OSTI ID:: 1469194

Report Number(s):: INL/JOU--16-38871-Rev000

Journal Information:: ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 11 Vol. 9; ISSN 1944-8244

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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ALD Atomic layer deposition
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