Improving intrinsic oxygen reduction activity and stability: Atomic layer deposition preparation of platinum-titanium alloy catalysts

被引：20

作者：

Kim, Yongmin ^{[1
,2
]}

Xu, Shicheng ^{[1
]}

Park, Joonsuk ^{[3
]}

Dadlani, Anup Lal ^{[1
]}

Vinogradova, Olga ^{[4
]}

Krishnamurthy, Dilip ^{[5
]}

Orazov, Marat ^{[6
]}

Lee, Dong Un ^{[6
]}

Dull, Sam ^{[6
]}

Schindler, Peter ^{[3
]}

Han, Hyun Soo ^{[1
]}

Wang, Zhaoxuan ^{[3
]}

Graf, Tanja ^{[7
]}

Schladt, Thomas D. ^{[7
]}

Mueller, Jonathan E. ^{[7
]}

Sarangi, Ritimukta ^{[8
]}

Davis, Ryan ^{[8
]}

Viswanathan, Venkatasubramanian ^{[4
]}

Jaramillo, Thomas Francisco ^{[6
]}

Higgins, Drew C. ^{[6
,9
]}

Prinz, Fritz B. ^{[1
,3
,10
]}

机构：

[1] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[2] Korea Inst Sci & Technol, Ctr Hydrogen Fuel Cell Res, Seoul 02792, South Korea

[3] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[4] Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA

[5] Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA

[6] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA

[7] Volkswagen Grp Res, Wolfsburg, Germany

[8] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[9] McMaster Univ, Dept Chem Engn, Hamilton, ON, Canada

[10] Norwegian Univ Sci & Technol, Dept Mech & Ind Engn, Trondheim, Norway

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2022年 / 300卷

基金：

奥地利科学基金会; 美国国家科学基金会;

关键词：

Atomic layer deposition; Polymer electrolyte fuel cells; Oxygen reduction reaction; Platinum-titanium alloys; ENHANCED ACTIVITY; PT/C CATALYSTS; ELECTROCATALYSTS; METAL; DURABILITY; LANTHANIDE;

D O I：

10.1016/j.apcatb.2021.120741

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：

Improved activity and stability Pt-based catalysts for the oxygen reduction reaction (ORR) are needed to perpetuate the deployment of polymer electrolyte fuel cells (PEFCs) in the transportation sector. Here, we use atomic layer deposition of TiO2 and Pt coupled with thermal reductive annealing to prepare Pt3Ti electrocatalysts. The atomic level synthetic control resulted in Pt3Ti nanoparticles with high ORR performance, including a mass activity of 1.84 A/mgPt and excellent electrochemical stability. The Pt3Ti nanoparticles show excellent specific activity - 5.3-fold higher than commercial Pt/C and 3-fold higher than polycrystalline Pt, exceeding the performance of any PtTi catalysts reported to date. Combined experimental and computational efforts indicate that Pt enrichment on the Pt3Ti enhances the activity, and the intrinsic stability of the Pt3Ti phase provides durability. This knowledge, along with the facile fabrication of alloys by atomic layer deposition, can be leveraged to designed improved performance catalysts.

引用

页数：10

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