Operando Time-Resolved X-ray Absorption Fine Structure Study for Surface Events on a Pt3Co/C Cathode Catalyst in a Polymer Electrolyte Fuel Cell during Voltage-Operating Processes

被引：94

作者：

Ishiguro, Nozomu ^{[1
,2
]}

Saida, Takahiro ^{[1
]}

Uruga, Tomoya ^{[3
,4
]}

Nagamatsu, Shin-ichi ^{[4
]}

Sekizawa, Oki ^{[4
]}

Nitta, Kiyofumi ^{[3
]}

Yamamoto, Takashi ^{[4
,5
]}

Ohkoshi, Shin-ichi ^{[2
]}

Iwasawa, Yasuhiro ^{[4
]}

Yokoyama, Toshihiko ^{[1
,6
]}

Tada, Mizuld ^{[1
,6
]}

机构：

[1] Inst Mol Sci, Okazaki, Aichi 4448585, Japan

[2] Univ Tokyo, Grad Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 1130033, Japan

[3] SPring 8, Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

[4] Univ Electrocommun, Innovat Res Ctr Fuel Cells, Chofu, Tokyo 1828585, Japan

[5] Univ Tokushima, Fac Integrated Arts & Sci, Dept Math & Mat Sci, Tokushima 7708502, Japan

[6] Grad Univ Adv Studies SOKENDAI, Okazaki, Aichi 4448585, Japan

来源：

ACS CATALYSIS | 2012年 / 2卷 / 07期

关键词：

fuel cell; PEFC; operando XAFS; time-resolved XAFS; Pt3Co catalyst; structural kinetics; OXYGEN REDUCTION REACTION; SHELL NANOPARTICLE ELECTROCATALYSTS; ACTIVITY-STABILITY RELATIONSHIPS; IN-SITU; PT-CO; ALLOY CATHODE; BIMETALLIC SURFACES; PLATINUM; DURABILITY; CARBON;

D O I：

10.1021/cs300228p

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structural kinetics of surface events on a Pt3Co/C cathode catalyst in a polymer electrolyte fuel cell (pEFc) was investigated by operando time-resolved X-ray absorption fine,structure (XAFS) with a time resolution of 500 me. The :rate: Constants of electrochemical reactions, the changes in charge density on Pt, and the changes in the local coordination structures of the Pt3Co alloy catalyst in the pEFC were Successfully evaluated during fuel-cell voltage-operating;processes. Significant time lags were observed between the electrochemical reactions and the structural changes in the Pt3Co alloy catalyst. the rate constants of all the surface events on the Pt3Co/C catalyst were significantly higher than those on the Pt/C catalyst, suggesting the advantageous behaviors (cell performance and catalyst durability) on the Pt3Co alloY cathode catalyst:

引用

页码：1319 / 1330

页数：12

共 18 条

[1] Operando Time-Resolved X-ray Absorption Fine Structure Study for Pt Oxidation Kinetics on Pt/C and Pt3Co/C Cathode Catalysts by Polymer Electrolyte Fuel Cell Voltage Operation Synchronized with Rapid O2 Exposure
Ozawa, Saki
Matsui, Hirosuke
Ishiguro, Nozomu
Tan, Yuanyuan
Maejima, Naoyuki
Taguchi, Masahiro
Uruga, Tomoya
Sekizawa, Oki
Sakata, Tomohiro
Nagasawa, Kensaku
Higashi, Kotaro
Tada, Mizuki
JOURNAL OF PHYSICAL CHEMISTRY C, 2018, 122 (26): : 14511 - 14517
[2] Structural kinetics study of redox processes of Pt/C and Pt3Co/C cathode electrocatalysts in a polymer electrolyte fuel cell during an accelerated durability test by in situ time-resolved XAFS
Ishiguro, Nozomu
Kityakarn, Sutasinee
Sekizawa, Oki
Uruga, Tomoya
Matsui, Hirosuke
Nagasawa, Kensaku
Yokoyama, Toshihiko
Tada, Mizuki
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2017, 253
[3] In situ time-resolved dynamic surface events on the Pt/C cathode in a fuel cell under operando conditions
Tada, Mizuki
Murata, Shigeaki
Asakoka, Takahiko
Hiroshima, Kazutaka
Okumura, Kazu
Tanida, Hajime
Uruga, Tomoya
Nakanishi, Haruyuki
Matsumoto, Shin-ichi
Inada, Yasuhiro
Nomura, Masaharu
Iwasawa, Yasuhiro
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2007, 46 (23) : 4310 - 4315
[4] Differences in structural kinetics of Pt3Co/C and Pt/C cathode electrocatalysts under PEFC operating conditions by operando time-resolved XAFS
Ishiguro, Nozomu
Saida, Takahiro
Uruga, Tomoya
Sekizawa, Oki
Nagasawa, Kensaku
Kityakarn, Sutasinee
Yamamoto, Takashi
Yokoyama, Toshihiko
Tada, Mizuki
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2014, 247
[5] Rate Enhancements in Structural Transformations of Pt-Co and Pt-Ni Bimetallic Cathode Catalysts in Polymer Electrolyte Fuel Cells Studied by in Situ Time-Resolved X-ray Absorption Fine Structure
Ishiguro, Nozomu
Kityakarn, Sutasinee
Sekizawa, Oki
Uruga, Tomoya
Sasabe, Takashi
Nagasawa, Kensaku
Yokoyama, Toshihiko
Tada, Mizuki
JOURNAL OF PHYSICAL CHEMISTRY C, 2014, 118 (29): : 15874 - 15883
[6] Kinetics and Mechanism of Redox Processes of Pt/C and Pt3Co/C Cathode Electrocatalysts in a Polymer Electrolyte Fuel Cell during an Accelerated Durability Test
Ishiguro, Nozomu
Kityakarn, Sutasinee
Sekizawa, Oki
Uruga, Tomoya
Matsui, Hirosuke
Taguchi, Masahiro
Nagasawa, Kensaku
Yokoyama, Toshihiko
Tada, Mizuki
JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (35): : 19642 - 19651
[7] Simultaneous Operando Time-Resolved XAFS-XRD Measurements of a Pt/C Cathode Catalyst in Polymer Electrolyte Fuel Cell under Transient Potential Operations
Sekizawa, Oki
Uruga, Tomoya
Higashi, Kotaro
Kaneko, Takuma
Yoshida, Yusuke
Sakata, Tomohiro
Iwasawa, Yasuhiro
ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2017, 5 (05): : 3631 - 3636
[8] Key Structural Kinetics for Carbon Effects on the Performance and Durability of Pt/Carbon Cathode Catalysts in Polymer Electrolyte Fuel Cells Characterized by In Situ Time-Resolved X-ray Absorption Fine Structure
Kaneko, Takuma
Samjeske, Gabor
Nagamatsu, Shin-ichi
Higashi, Kotaro
Sekizawa, Oki
Takao, Shinobu
Yamamoto, Takashi
Zhao, Xiao
Sakata, Tomohiro
Uruga, Tomoya
Iwasawa, Yasuhiro
JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (42): : 24250 - 24264
[9] Following ORR intermediates adsorbed on a Pt cathode catalyst during break-in of a PEM fuel cell by in operando X-ray absorption spectroscopy
Ramaker, D. E.
Korovina, A.
Croze, V.
Melke, J.
Roth, C.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2014, 16 (27) : 13645 - 13653
[10] In-Operando Anomalous Small-Angle X-Ray Scattering Investigation of Pt3Co Catalyst Degradation in Aqueous and Fuel Cell Environments
Gilbert, James A.
Kropf, A. Jeremy
Kariuki, Nancy N.
DeCrane, Stacy
Wang, Xiaoping
Rasouli, Somaye
Yu, Kang
Ferreira, Paulo J.
Morgan, Dane
Myers, Deborah J.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2015, 162 (14) : F1487 - F1497

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