4.8 Article

Heterostructured Pd/Ti/Pd Thin Films as Highly Efficient Catalysts for Methanol and Formic Acid Oxidation

Journal

ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 27, Pages 31725-31732

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c07846

Keywords

thin films; catalysts; formic acid; methanol; oxidation

Funding

  1. National Key Research and Development Program of China [2019YFA0705702]
  2. National Natural Science Foundation of China [22075328]
  3. Hundreds of Talents program of Sun Yat-sen University
  4. Fundamental Research Funds for the Central Universities [19lgzd05]
  5. 21C Innovation Laboratory, Contemporary Amperex Technology Ltd. [21C-OP-202007]
  6. Guangdong Provincial Key Laboratory of Energy Materials for Electric Power [2018B030322001]
  7. Research Fund Program of Key Laboratory of Fuel Cell Technology of Guangdong Province
  8. open fund of Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials [AESM202105]

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This article presents heterostructured Pd/Ti/Pd bimetallic thin films as efficient electrocatalysts for proton exchange membrane fuel cells, demonstrating superior electrocatalytic activity towards the oxidation of methanol and formic acid. The materials show low onset oxidation potential, high current retention, and enhanced carbon monoxide poisoning resistance, suggesting their potential as promising materials for energy conversion in the fuel cell field.
Finding a highly efficient catalyst for proton exchange membrane fuel cells is still the subject of extensive research. This article describes heterostructured Pd/Ti/Pd bimetallic thin films prepared using a strain-release technology as electrocatalysts for fuel cells. With their particular structure, these materials exhibit intriguing electrocatalytic activity toward the oxidation of both methanol and formic acid, yielding current densities of 0.17 and 0.56 A mg(Pd)(-1), much superior to that of the commercial Pd black catalyst. Moreover, the Pd/Ti/Pd thin films display a low onset oxidation potential and extremely high current retention in both acidic and alkaline media. The carbon monoxide poisoning resistance is also significantly enhanced, thus contributing to ultrahigh stability in the long-term electrocatalytic processes. Their encouraging performance implies that such composites could be potential materials for energy conversion in the fuel cell field.

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