Journal
NANO LETTERS
Volume 22, Issue 3, Pages 1391-1397Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c04840
Keywords
Pd-based catalysts; Pd-Cu hydrides; hydrogen evolution reaction; electrocatalysis; hydrogen adsorption free energy
Categories
Funding
- National Natural Science Foundation of China [22109043]
- Shanghai Risingstar Program [20QA1402400]
- Fundamental Research Funds for the Central Universities
- Ministry of Science and Technology, Taiwan [MOST 110-2221-E-008-061-MY3]
- Program of Introducing Talents of Discipline to Universities [B16017]
- Frontiers Science Center for Materiobiology and Dynamic Chemistry at East China University of Science and Technology
- Feringa Nobel Prize Scientist Joint Research Center at East China University of Science and Technology
- Shanghai Municipal Science and Technology [2018SHZDZX03]
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In this study, a stable Pd-Cu hydride catalyst was designed and synthesized, which combines the advantages of Pd-M and PdHx structures to improve the stability and durability of the hydrogen evolution reaction.
Pd has been regarded as one of the alternatives to Pt as a promising hydrogen evolution reaction (HER) catalyst. Strategies including Pd-metal alloys (Pd-M) and Pd hydrides (PdHx) have been proposed to boost HER performances. However, the stability issues, e.g., the dissolution in Pd-M and the hydrogen releasing in PdHx, restrict the industrial application of Pd-based HER catalysts. We here design and synthesize a stable Pd-Cu hydride (PdCu0.2H0.43) catalyst, combining the advantages of both Pd-M and PdHx structures and improving the HER durability simultaneously. The hydrogen intercalation is realized under atmospheric pressure (1.0 atm) following our synthetic approach that imparts high stability to the Pd-Cu hydride structure. The obtained PdCu0.2H0.43 catalyst exhibits a small overpotential of 28 mV at 10 mA/cm(2), a low Tafel slope of 23 mV/dec, and excellent HER durability due to its appropriate hydrogen adsorption free energy and alleviated metal dissolution rate.
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