In situ EXAFS studies of novel Palladium-based anode catalysts for direct ethanol and formic acid fuel cells

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Description

In this work we made nanoscale uniform deposition of Pd based anode catalyst on the transition metal Au (with atomic ratio Pd:Au=1:10) support of direct liquid ethanol ... Show moreIn this work we made nanoscale uniform deposition of Pd based anode catalyst on the transition metal Au (with atomic ratio Pd:Au=1:10) support of direct liquid ethanol
fuel cells (DLEFCs) and direct liquid formic acid fuel cells (DLFAFCs). Synthesizing
with uniform dispersion and catalyst nanoparticle dimensions understand the role of Pd
reaction on its support in the direct EOR (ethanol oxidation reaction) and FOR (formic
acid reaction) pathways, we performed in situ Pd K-edge X-ray absorption spectroscopy
measurements as a function of potential using a custom-designed flow cell with the
catalyst deposited on the glassy carbon window. We did in-situ EXAFS to better
understand the reaction mechanism of Pd1@Au10 anode catalyst with EOR and AOR in
nanoscale. Compared EOR with FOR electrochemical performance showed Pd@Au&C
played better in ethanol than HCOOH and more stable which the the current density can
reach up to 1216.25 mA·mg-1 Pd of EOR with Pd1@Au10&C in 1M KOH+1M EtOH
(CH3CH2OH) on the ethanol fuel cells (DLEFCs), and 3.56 times higher of the EOR
current compared with commercial Pd@C Show less

Details
Department

PHYS / Physics

Title

In situ EXAFS studies of novel Palladium-based anode catalysts for direct ethanol and formic acid fuel cells

Institution

Illinois Institute of Technology

Creator(s)

Su, Ning

Advisor(s)

Segre, Carlo U.

Date

2024

Description

In this work we made nanoscale uniform deposition of Pd based anode catalyst on the transition metal Au (with atomic ratio Pd:Au=1:10) support of direct liquid ethanol fuel cells (DLEFCs) and... Show moreIn this work we made nanoscale uniform deposition of Pd based anode catalyst on the transition metal Au (with atomic ratio Pd:Au=1:10) support of direct liquid ethanol fuel cells (DLEFCs) and direct liquid formic acid fuel cells (DLFAFCs). Synthesizing with uniform dispersion and catalyst nanoparticle dimensions understand the role of Pd reaction on its support in the direct EOR (ethanol oxidation reaction) and FOR (formic acid reaction) pathways, we performed in situ Pd K-edge X-ray absorption spectroscopy measurements as a function of potential using a custom-designed flow cell with the catalyst deposited on the glassy carbon window. We did in-situ EXAFS to better understand the reaction mechanism of Pd1@Au10 anode catalyst with EOR and AOR in nanoscale. Compared EOR with FOR electrochemical performance showed Pd@Au&C played better in ethanol than HCOOH and more stable which the the current density can reach up to 1216.25 mA·mg-1 Pd of EOR with Pd1@Au10&C in 1M KOH+1M EtOH (CH3CH2OH) on the ethanol fuel cells (DLEFCs), and 3.56 times higher of the EOR current compared with commercial Pd@C Show less

Type

Dissertation

File type

application/pdf

Subject

Physics
anode
catalyst
ethanol
fuel cell
material
XAS

Access

Restricted Access

Rights

In Copyright
http://rightsstatements.org/page/InC/1.0/

Identifier

http://hdl.handle.net/10560/islandora:1025163

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