Observing the Structural Evolution of Quasi-Monolayer Pt Shell on Pd Core in the Electrocatalytic Oxygen-Reduction Reaction

被引：2

作者：

Dong, Yan ^{[1
]}

Li, Zhenlan ^{[1
]}

Zheng, Guocheng ^{[1
]}

Zhang, Jiawei ^{[1
]}

Zhou, Jiawei ^{[1
]}

Orikasa, Yuki ^{[2
]}

Uchimoto, Yoshiharu ^{[3
]}

Wang, Xiaoming ^{[1
]}

机构：

[1] Shantou Univ, Coll Chem & Chem Engn, Key Lab Preparat & Applicat Ordered Struct Mat Gua, Shantou 515063, Peoples R China

[2] Ritsumeikan Univ, Coll Life Sci, Shiga 5258577, Japan

[3] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2023年 / 14卷 / 31期

关键词：

PLATINUM NANOPARTICLES; CATALYSTS; GROWTH;

D O I：

10.1021/acs.jpclett.3c01598

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 use of a quasi-monolayer Pt shell(Pt-qms) on a Pdcore (Pd-c) can reach cost and activity targets for theelectrocatalytic oxygen-reduction reaction (ORR). The structure ofPd(c)Pt(qms) in the ORR will vary; however, directobservation of this issue is scarce. Here, during cyclic staircasevoltammetry (ranging from 0.5 to 1.15 V-RHE) in 0.1 M O-2-saturated HClO4, the structure of PdcPtqms was monitored by in situ X-ray absorption spectroscopy.The qualitative and quantitative structural information clearly exhibitsa complete picture that Pt-qms will directly restructureto form Pt clusters and holes, while Pd-c almost remainsstable. These findings identify the initial structural evolution ofPd(c)Pt(qms) in the ORR, highlighting the importanceof protecting Pd-c in the development of high-performancePd(c)Pt(qms) electrocatalysts.

引用

页码：7027 / 7031

页数：5

共 23 条

[1] Platinum monolayer fuel cell electrocatalysts [J].

Adzic, R. R. ;

Zhang, J. ;

Sasaki, K. ;

Vukmirovic, M. B. ;

Shao, M. ;

Wang, J. X. ;

Nilekar, A. U. ;

Mavrikakis, M. ;

Valerio, J. A. ;

Uribe, F. .

TOPICS IN CATALYSIS, 2007, 46 (3-4) :249-262

[2] Metal monolayer deposition by replacement of metal adlayers on electrode surfaces [J].

Brankovic, SR ;

Wang, JX ;

Adzic, RR .

SURFACE SCIENCE, 2001, 474 (1-3) :L173-L179

[3] Electrodeposition of a Pt Monolayer Film: Using Kinetic Limitations for Atomic Layer Epitaxy [J].

Brimaud, Sylvain ;

Behm, R. Juergen .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2013, 135 (32) :11716-11719

[4] Correlating the electrocatalytic stability of platinum monolayer catalysts with their structural evolution in the oxygen reduction reaction [J].

Chen, Guangyu ;

Kuttiyiel, Kurian A. ;

Li, Meng ;

Su, Dong ;

Du, Lei ;

Du, Chunyu ;

Gao, Yunzhi ;

Fei, Weidong ;

Yin, Geping ;

Sasaki, Kotaro ;

Adzic, Radoslav R. .

JOURNAL OF MATERIALS CHEMISTRY A, 2018, 6 (42) :20725-20736

[5] Oxygen Reduction Electrocatalyst of Pt on Au Nanoparticles through Spontaneous Deposition [J].

Dai, Yu ;

Chen, Shengli .

ACS APPLIED MATERIALS & INTERFACES, 2015, 7 (01) :823-829

[6] Electrocatalyst approaches and challenges for automotive fuel cells [J].

Debe, Mark K. .

NATURE, 2012, 486 (7401) :43-51

[7] Facet-Orientated Pd Core Impels Quasi-Monolayer Pt Shell To Boost the Oxygen-Reduction Electrocatalysis [J].

Dong, Yan ;

Liu, Yang ;

He, Yuanyuan ;

Chen, Zhuoyao ;

Chen, Jing ;

Orikasa, Yuki ;

Uchimoto, Yoshiharu ;

Wang, Xiaoming .

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2023, 11 (26) :9523-9527

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

Gasteiger, Hubert A. ;

Markovic, Nenad M. .

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

[9] Coordination-dependent surface atomic contraction in nanocrystals revealed by coherent diffraction [J].

Huang, W. J. ;

Sun, R. ;

Tao, J. ;

Menard, L. D. ;

Nuzzo, R. G. ;

Zuo, J. M. .

NATURE MATERIALS, 2008, 7 (04) :308-313

[10] In Situ and Real-Time Monitoring of Oxide Growth in a Few Monolayers at Surfaces of Platinum Nanoparticles in Aqueous Media [J].

Imai, Hideto ;

Izumi, Koichi ;

Matsumoto, Masashi ;

Kubo, Yoshimi ;

Kato, Kazuo ;

Imai, Yasuhiko .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (17) :6293-6300

← 1 2 3 →