Publications by authors named "Gabor Samjeske"

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Transient Kinetic QXAFS Approach for Understanding the RDE-MEA Gap in Fuel Cell (Oxygen Reduction Reaction) Performances of Pt-Based Electrocatalysts.
Takefumi Yoshida, Shinobu Takao, Hiroko Ariga-Miwa, Xiao Zhao, Gabor Samjeské

ACS Omega· January 2025

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Imaging of Ce Radical Scavengers in a Practical Polymer Electrolyte Fuel Cell by 3D Fluorescence CT-XAFS and Depth-Profiling Nano-XAFS-SEM/EDS Techniques.
Hirosuke Matsui, Shinobu Takao, Kotaro Higashi, Takuma Kaneko, Gabor Samjeské

ACS Appl Mater Interfaces· February 2022

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Ultrafine Pt-Ni nanoparticles in hollow porous carbon spheres for remarkable oxygen reduction reaction catalysis.
Xian-Kai Wan, Gabor Samjeské, Hirosuke Matsui, Chaoqi Chen, Satoshi Muratsugu

Dalton Trans· May 2021

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Visualization and understanding of the degradation behaviors of a PEFC Pt/C cathode electrocatalyst using a multi-analysis system combining time-resolved quick XAFS, three-dimensional XAFS-CT, and same-view nano-XAFS/STEM-EDS techniques.
Kotaro Higashi, Shinobu Takao, Gabor Samjeské, Hirosuke Matsui, Mizuki Tada

Phys Chem Chem Phys· September 2020

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Feed gas exchange (startup/shutdown) effects on Pt/C cathode electrocatalysis and surface Pt-oxide behavior in polymer electrolyte fuel cells as revealed using in situ real-time XAFS and high-resolution STEM measurements.
Gabor Samjeské, Takuma Kaneko, Takao Gunji, Kotaro Higashi, Tomoya Uruga

Phys Chem Chem Phys· May 2020

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Visualization Analysis of Pt and Co Species in Degraded PtCo/C Electrocatalyst Layers of a Polymer Electrolyte Fuel Cell Using a Same-View Nano-XAFS/STEM-EDS Combination Technique.
Shinobu Takao, Oki Sekizawa, Kotaro Higashi, Gabor Samjeské, Takuma Kaneko

ACS Appl Mater Interfaces· January 2020

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Observation of Degradation of Pt and Carbon Support in Polymer Electrolyte Fuel Cell Using Combined Nano-X-ray Absorption Fine Structure and Transmission Electron Microscopy Techniques.
Shinobu Takao, Oki Sekizawa, Gabor Samjeské, Takuma Kaneko, Kotaro Higashi

ACS Appl Mater Interfaces· August 2018

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Non-contact electric potential measurements of electrode components in an operating polymer electrolyte fuel cell by near ambient pressure XPS.
Liwei Yu, Yasumasa Takagi, Takahiro Nakamura, Oki Sekizawa, Tomohiro Sakata

Phys Chem Chem Phys· November 2017

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In situ study of oxidation states of platinum nanoparticles on a polymer electrolyte fuel cell electrode by near ambient pressure hard X-ray photoelectron spectroscopy.
Yasumasa Takagi, Heng Wang, Yohei Uemura, Takahiro Nakamura, Liwei Yu

Phys Chem Chem Phys· February 2017

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Surface-Regulated Nano-SnO2/Pt3Co/C Cathode Catalysts for Polymer Electrolyte Fuel Cells Fabricated by a Selective Electrochemical Sn Deposition Method.
Kensaku Nagasawa, Shinobu Takao, Shin-ichi Nagamatsu, Gabor Samjeské, Oki Sekizawa

J Am Chem Soc· October 2015

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Same-View Nano-XAFS/STEM-EDS Imagings of Pt Chemical Species in Pt/C Cathode Catalyst Layers of a Polymer Electrolyte Fuel Cell.
Shinobu Takao, Oki Sekizawa, Gabor Samjeské, Shin-ichi Nagamatsu, Takuma Kaneko

J Phys Chem Lett· June 2015

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Mapping platinum species in polymer electrolyte fuel cells by spatially resolved XAFS techniques.
Shinobu Takao, Oki Sekizawa, Shin-ichi Nagamatsu, Takuma Kaneko, Takashi Yamamoto

Angew Chem Int Ed Engl· December 2014

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Performance and durability of Pt/C cathode catalysts with different kinds of carbons for polymer electrolyte fuel cells characterized by electrochemical and in situ XAFS techniques.
Kensaku Nagasawa, Shinobu Takao, Kotaro Higashi, Shin-ichi Nagamatsu, Gabor Samjeské

Phys Chem Chem Phys· June 2014

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Performance and characterization of a Pt-Sn(oxidized)/C cathode catalyst with a SnO2-decorated Pt3Sn nanostructure for oxygen reduction reaction in a polymer electrolyte fuel cell.
Gabor Samjeské, Shin-ichi Nagamatsu, Shinobu Takao, Kensaku Nagasawa, Yoshiaki Imaizumi

Phys Chem Chem Phys· October 2013

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The role of bridge-bonded adsorbed formate in the electrocatalytic oxidation of formic acid on platinum.
Masatoshi Osawa, Kei-ichi Komatsu, Gabor Samjeské, Taro Uchida, Tamio Ikeshoji

Angew Chem Int Ed Engl· February 2011

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Formic acid electrooxidation on Pd in acidic solutions studied by surface-enhanced infrared absorption spectroscopy.
Hiroto Miyake, Tatsuhiro Okada, Gabor Samjeské, Masatoshi Osawa

Phys Chem Chem Phys· July 2008

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An unexpected enhancement in methanol electro-oxidation on an ensemble of Pt(111) nanofacets: a case of nanoscale single crystal ensemble electrocatalysis.
Ceren Susut, George B Chapman, Gabor Samjeské, Masatoshi Osawa, YuYe Tong

Phys Chem Chem Phys· July 2008

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Mechanistic study of electrocatalytic oxidation of formic acid at platinum in acidic solution by time-resolved surface-enhanced infrared absorption spectroscopy.
Gabor Samjeské, Atsushi Miki, Shen Ye, Masatoshi Osawa

J Phys Chem B· August 2006

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Potential oscillations in galvanostatic electrooxidation of formic acid on platinum: a mathematical modeling and simulation.
Yoshiharu Mukouyama, Mitsunobu Kikuchi, Gabor Samjeské, Masatoshi Osawa, Hiroshi Okamoto

J Phys Chem B· June 2006

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Potential oscillations in galvanostatic electrooxidation of formic acid on platinum: a time-resolved surface-enhanced infrared study.
Gabor Samjeské, Atsushi Miki, Shen Ye, Akira Yamakata, Yoshiharu Mukouyama

J Phys Chem B· December 2005

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Current oscillations during formic acid oxidation on a Pt electrode: insight into the mechanism by time-resolved IR spectroscopy.
Gabor Samjeské, Masatoshi Osawa

Angew Chem Int Ed Engl· September 2005

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