Sub-15 nm Pd@PtCu concave octahedron with enriched atomic steps as enhanced oxygen reduction electrocatalyst

Zhao, Zhi Liang1,2; Wang, Qi2; Du, Hongfang1; Liang, Taotao1; An, Hong Ming1; Li, Chang Ming1,3,4,5

2019-09-15

10.1016/j.jpowsour.2019.226742

JOURNAL OF POWER SOURCES   影响因子和分区

0378-7753

1873-2755

Catalyst nanoparticles with enriched atomic steps structure can offer higher catalytic performance. Nevertheless, the reported sizes of PtCu nanoparticles with enriched atomic steps surface are usually larger than 30 nm or even hundreds of nanometres, which need great reduction for further improved catalytic performance. In this work, Pd nanocubes are used as seeds for mediating growth of 13.7 nm Pd@PtCu concave octahedrons with enriched atomic steps surface. Towards oxygen reduction reaction, the specific activity at 0.9 V for the Pd@PtCu concave octahedral catalyst is 3.36 mA cm-2 Pt, which is 2.6 and 11.4 times higher than that of Pd@PtCu octahedron (1.31 mA cm-2 Pt) and commercial Pt/C (0.29 mA cm-2 Pt) catalyst, respectively. The dramatic performance enhancement can be ascribed to the reduced particle sizes for increased electrochemically active surface area (ECSA), a high density of atomic steps and a large number of concave sites as highly active catalytic reaction centers to break O-O bonds. This work demonstrates a new approach to synthesize a superior electroactive catalyst, holding a great promise for practical applications in high-performance and low-temperature fuel cells.

Core-shell Enriched atomic steps structure Concave octahedron Oxygen reduction reaction

SCI ; EI

英语

其他

Graduate Student Research Innovation Project of Chongqing[CYB16055]

Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000480664400005

ELSEVIER

20192607104626

Atoms ; Binary alloys ; Copper alloys ; Electrocatalysts ; Electrolysis ; Electrolytic reduction ; Fuel cells ; Nanocatalysts ; Nanoparticles ; Oxygen ; Temperature

Ore Treatment:533.1 ; Copper Alloys:544.2 ; Precious Metals:547.1 ; Thermodynamics:641.1 ; Fuel Cells:702.2 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Atomic and Molecular Physics:931.3 ; Solid State Physics:933

MATERIALS SCIENCE

Web of Science

1.Southwest Univ, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Suzhou Univ Sci & Technol, Inst Mat Sci & Devices, Suzhou 215009, Peoples R China
4.Qingdao Univ, Res Inst Adv Cross Field Sci, Qingdao 266071, Shandong, Peoples R China
5.Qingdao Univ, Coll Life Sci, Qingdao 266071, Shandong, Peoples R China

Zhao, Zhi Liang,Wang, Qi,Du, Hongfang,et al. Sub-15 nm Pd@PtCu concave octahedron with enriched atomic steps as enhanced oxygen reduction electrocatalyst[J]. JOURNAL OF POWER SOURCES,2019,434.

Zhao, Zhi Liang,Wang, Qi,Du, Hongfang,Liang, Taotao,An, Hong Ming,&Li, Chang Ming.(2019).Sub-15 nm Pd@PtCu concave octahedron with enriched atomic steps as enhanced oxygen reduction electrocatalyst.JOURNAL OF POWER SOURCES,434.

Zhao, Zhi Liang,et al."Sub-15 nm Pd@PtCu concave octahedron with enriched atomic steps as enhanced oxygen reduction electrocatalyst".JOURNAL OF POWER SOURCES 434(2019).