Highly Active Epitaxial La(1-x)SrxMnO3 Surfaces for the Oxygen Reduction Reaction: Role of Charge Transfer

被引：107

作者：

Stoerzinger, Kelsey A. ^{[1
,2
]}

Lu, Weiming ^{[4
]}

Li, Changjian ^{[4
,5
]}

Ariando ^{[4
,6
]}

Venkatesan, T. ^{[4
,5
,6
,7
]}

Shao-Horn, Yang ^{[1
,2
,3
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[2] MIT, Electrochem Energy Lab, Cambridge, MA 02139 USA

[3] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[4] NUSNNI Nanocore, Singapore, Singapore

[5] Natl Univ Singapore, Grad Sch Integrat Sci & Engn NGS, Singapore 117548, Singapore

[6] Natl Univ Singapore, Dept Phys, Singapore 117548, Singapore

[7] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117548, Singapore

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2015年 / 6卷 / 08期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

ELECTROCATALYTIC ACTIVITY; OXIDE CATALYSTS; PEROVSKITE; LA1-XSRXMNO3; CARBON; TRANSITION; DEPENDENCE; EFFICIENT; PROPERTY;

D O I：

10.1021/acs.jpclett.5b00439

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：

Most studies of oxide catalysts for the oxygen reduction reaction (ORR) use oxide powder, where the heterogeneity of exposed surfaces and the composite nature of electrodes limit fundamental understanding of the reaction mechanism. We present the ORR activity of epitaxially oriented La(1-x)SrxMnO3 surfaces and investigate, by varying Sr substitution, the relationship between the role of charge transfer and catalytic activity in an alkaline environment. The activity is greatest for La(1-x)SrxMnO3 with 33% Sr, containing mixed Mn3+/4+, and the (110) and (111) orientations display comparable activities to that of the (001). Electrochemical measurements using the facile redox couple [Fe(CN)(6)](3-/4-) illustrate that increasing ORR activity trends with faster charge-transfer kinetics, indicating the importance of facile charge transfer at the oxide/water interface and mixed Mn valence in promoting ORR kinetics.

引用

页码：1435 / 1440

页数：6

共 35 条

[1] Building better batteries [J].

Armand, M. ;

Tarascon, J. -M. .

NATURE, 2008, 451 (7179) :652-657

[2] LaMnO3 Thin Films Grown by Using Pulsed Laser Deposition and Their Simple Recovery to a Stoichiometric Phase by Annealing [J].

Choi, Woo Seok ;

Jeong, Da Woon ;

Jang, Seung Yup ;

Marton, Z. ;

Seo, Sung Seok A. ;

Lee, Ho Nyung ;

Lee, Yun Sang .

JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 2011, 58 (03) :569-574

[3] SOLUBILITY AND DIFFUSION COEFFICIENT OF OXYGEN IN POTASSIUM HYDROXIDE SOLUTIONS [J].

DAVIS, RE ;

HORVATH, GL ;

TOBIAS, CW .

ELECTROCHIMICA ACTA, 1967, 12 (03) :287-&

[4] Nonstoichiometric Perovskite CaMnO3-δ for Oxygen Electrocatalysis with High Activity [J].

Du, Jing ;

Zhang, Tianran ;

Cheng, Fangyi ;

Chu, Wangsheng ;

Wu, Ziyu ;

Chen, Jun .

INORGANIC CHEMISTRY, 2014, 53 (17) :9106-9114

[5] Composite Electrode Boosts the Activity of Ba0.5Sr0.5Co0.8Fe0.2O3-δ Perovskite and Carbon toward Oxygen Reduction in Alkaline Media [J].

Fabbri, Emiliana ;

Mohamed, Rhiyaad ;

Levecque, Pieter ;

Conrad, Olaf ;

Koetz, Ruediger ;

Schmidt, Thomas J. .

ACS CATALYSIS, 2014, 4 (04) :1061-1070

[6] Just a Dream-or Future Reality? [J].

Gasteiger, Hubert A. ;

Markovic, Nenad M. .

SCIENCE, 2009, 324 (5923) :48-49

[7] Preparation and characterization of La1-xSrxMnO3+δ (0≤x≤0.6) powder by sol-gel processing [J].

Gaudon, M ;

Laberty-Robert, C ;

Ansart, F ;

Stevens, P ;

Rousset, A .

SOLID STATE SCIENCES, 2002, 4 (01) :125-133

[8] Mn3O4 Supported on Glassy Carbon: An Active Non-Precious Metal Catalyst for the Oxygen Reduction Reaction [J].

Gorlin, Yelena ;

Chung, Chia-Jung ;

Nordlund, Dennis ;

Clemens, Bruce M. ;

Jaramillo, Thomas F. .

ACS CATALYSIS, 2012, 2 (12) :2687-2694

[9] Orientation dependence of charge-transfer processes on TiO2 (anatase) single crystals [J].

Hengerer, R ;

Kavan, L ;

Krtil, P ;

Grätzel, M .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (04) :1467-1472

[10] Spontaneous polarization model for surface orientation dependence of diamond hole accumulation layer and its transistor performance [J].

Hirama, K. ;

Takayanagi, H. ;

Yamauchi, S. ;

Yang, J. H. ;

Kawarada, H. ;

Umezawa, H. .

APPLIED PHYSICS LETTERS, 2008, 92 (11)

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