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PreprintCC BYChemRxiv

eHydrogenation 2.0: Pd/C-Catalysed Hydrogenation of Alkenes and Alkynes without Externally Supplied H₂

  • Hamid Salehzadeh1,2
  • Feba T. Pulikkottil1,2
  • Romain Ogier3,4
  • Jack Brennan1,2
  • Zhixuan He5
  • Kevin Lam1,2
5 affiliations
  1. 1School of Science, Faculty of Engineering and Science
  2. 2University of Greenwich
  3. 3École Nationale Supérieure de Chimie de Mulhouse (ENSCMu)
  4. 4Université de Haute-Alsace
  5. 5Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, London, UK, W12 0BZ
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Abstract

We report an electrochemically driven Pd/C-catalysed method for the exhaustive hydrogenation of alkenes and alkynes without externally supplied H2. In an undivided cell, commercially available Pd/C in EtOH converts terminal and internal unsaturated substrates under mild constant-current conditions. Standard carbon-electrode/TFA conditions and a complementary Mg-anode/Et4NBF4 protocol furnish saturated products in up to quantitative yield while tolerating alcohols, ethers, esters, amides, sulfonamides, nitriles, phosphates, heterocycles, and carbon–halogen bonds. Most alkenes react at 4 F mol-1, whereas alkynes generally require 6 F mol-1. Coupling heterogeneous catalysis with electrochemical generation of reducing equivalents provides an operationally simple alternative to conventional hydrogenation with externally supplied H2.

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Cite

BibTeXRIS
BibTeX
@misc{salehzadeh2026ehydrogenation,
  title = {{eHydrogenation 2.0: Pd/C-Catalysed Hydrogenation of Alkenes and Alkynes without Externally Supplied H₂}},
  author = {Hamid Salehzadeh and Feba T. Pulikkottil and Romain Ogier and Jack Brennan and Zhixuan He and Kevin Lam},
  howpublished = {ChemRxiv},
  year = {2026},
  month = sep,
  doi = {10.26434/chemrxiv.15008455/v1},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008455/v1},
  note = {CC BY},
}
RIS
TY  - UNPB
TI  - eHydrogenation 2.0: Pd/C-Catalysed Hydrogenation of Alkenes and Alkynes without Externally Supplied H₂
AU  - Hamid Salehzadeh
AU  - Feba T. Pulikkottil
AU  - Romain Ogier
AU  - Jack Brennan
AU  - Zhixuan He
AU  - Kevin Lam
PY  - 2026
DA  - 2026/09/07
PB  - ChemRxiv
DO  - 10.26434/chemrxiv.15008455/v1
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008455/v1
AB  - We report an electrochemically driven Pd/C-catalysed method for the exhaustive hydrogenation of alkenes and alkynes without externally supplied H2. In an undivided cell, commercially available Pd/C in EtOH converts terminal and internal unsaturated substrates under mild constant-current conditions. Standard carbon-electrode/TFA conditions and a complementary Mg-anode/Et4NBF4 protocol furnish saturated products in up to quantitative yield while tolerating alcohols, ethers, esters, amides, sulfonamides, nitriles, phosphates, heterocycles, and carbon–halogen bonds. Most alkenes react at 4 F mol-1, whereas alkynes generally require 6 F mol-1. Coupling heterogeneous catalysis with electrochemical generation of reducing equivalents provides an operationally simple alternative to conventional hydrogenation with externally supplied H2.
ER  -