Research on Chemical Intermediates

, Volume 45, Issue 2, pp 815–832 | Cite as

Pd–Co alloy as an efficient recyclable catalyst for the reduction of hazardous 4-nitrophenol

  • T. A. Revathy
  • T. Sivaranjani
  • A. A. Boopathi
  • Srinivasan Sampath
  • V. Narayanan
  • A. StephenEmail author


Palladium–Cobalt (Pd–Co) alloys with different atomic ratios were synthesized successfully by borohydride-assisted chemical reduction method. Pd–Co alloys were characterized to study their physical and chemical properties. Further, the catalytic behavior of the synthesized alloys and effect of cobalt inclusion into alloy for the catalytic behavior was studied using reduction of 4-nitrophenol (4-NP). The reduction of 4-NP into 4-aminophenol by sodium borohydride is one of the eminent model reactions to study catalytic behavior as it enables assessing the catalyst from the kinetic parameters calculated from the real-time spectroscopic monitoring of an aqueous solution. Pd–Co alloys show good catalytic activity towards the reduction of 4-NP and their rate constants were calculated. The catalytic studies reveal that reduction reaction catalyzed by prepared Pd–Co alloys follow the pseudo-first-order kinetics. Among them, Pd26Co74 catalyzed the reduction reaction with the minimum time of 7 min having a rate constant of 6.65 ms−1. The turn over frequency (TOF) for the corresponding alloy was calculated and found to be 26 h−1.

Graphical abstract


Pd–Co alloy Chemical reduction method Catalysis Nitrophenol 



One of the authors, T. A. Revathy, acknowledges UGC-UPE-Phase II for the financial assistance as a fellowship. Authors thank Dr. J. Senthil Selvan, Department of Nuclear physics, University of Madras, for access to UV–Vis absorption spectroscopy and K. C. Dharani Balaji, IIT Madras, is also acknowledged for HRSEM measurements.

Compliance with ethical standards

Conflict of interest

There are no conflicts of interest to declare.


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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • T. A. Revathy
    • 1
  • T. Sivaranjani
    • 1
  • A. A. Boopathi
    • 2
    • 3
  • Srinivasan Sampath
    • 4
  • V. Narayanan
    • 5
  • A. Stephen
    • 1
    Email author
  1. 1.Department of Nuclear PhysicsUniversity of MadrasChennaiIndia
  2. 2.Polymer Science and Technology DivisionCouncil of Scientific and Industrial Research–Central Leather Research InstituteChennaiIndia
  3. 3.Academy of Scientific and Innovative Research (AcSIR)New DelhiIndia
  4. 4.Department of Materials Science, School of TechnologyCentral University of Tamil NaduThiruvarurIndia
  5. 5.Department of Inorganic ChemistryUniversity of MadrasChennaiIndia

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