Applied Catalysis2022，Vol.30010.DOI:10.1016/j.apcatb.2021.120741

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

Kim, Yongmin Xu, Shicheng Park, Joonsuk Dadlani, Anup Lal Vinogradova, Olga Krishnamurthy, Dilip Orazov, Marat Lee, Dong Un Dull, Sam Schindler, Peter Han, Hyun Soo Wang, Zhaoxuan Graf, Tanja Schladt, Thomas D. Mueller, Jonathan E. Sarangi, Ritimukta Davis, Ryan Viswanathan, Venkatasubramanian Jaramillo, Thomas Francisco Higgins, Drew C. Prinz, Fritz B.
Applied Catalysis2022，Vol.30010.DOI:10.1016/j.apcatb.2021.120741
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  • NSTL
  • Elsevier

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

Kim, Yongmin 1Xu, Shicheng 1Park, Joonsuk 2Dadlani, Anup Lal 1Vinogradova, Olga 3Krishnamurthy, Dilip 4Orazov, Marat 5Lee, Dong Un 5Dull, Sam 5Schindler, Peter 2Han, Hyun Soo 1Wang, Zhaoxuan 2Graf, Tanja 6Schladt, Thomas D. 6Mueller, Jonathan E. 6Sarangi, Ritimukta 7Davis, Ryan 7Viswanathan, Venkatasubramanian 3Jaramillo, Thomas Francisco 5Higgins, Drew C. 5Prinz, Fritz B.1
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作者信息

  • 1. Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA
  • 2. Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA
  • 3. Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA
  • 4. Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA
  • 5. Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA
  • 6. Volkswagen Grp Res, Wolfsburg, Germany
  • 7. SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA
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Abstract

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.

Key words

Atomic layer deposition/Polymer electrolyte fuel cells/Oxygen reduction reaction/Platinum-titanium alloys

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出版年

2022
Applied Catalysis

Applied Catalysis

ISSN：0926-3373
被引量11
参考文献量50
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