Abstract
Commercial bimetallic Ni–Mo and Ni–Re electrocatalysts supported on advanced conductive carbon are high-performing materials for H2 evolution reaction in alkaline medium, but they cannot be applied in acidic medium due to the rapid dissolution of metals. In this work, we solve this issue by introducing a convenient phosphorization protocol to convert these commercial metallic electrocatalysts into the respective phosphides, rendering them stable under acidic conditions, and thus providing a pathway to electrocatalysts for water reduction in acidic electrolyte. The novel materials demonstrate high performance, as reflected by the measured low overpotentials, shallow Tafel slopes, fast kinetics, as well as excellent stability and durability. This work opens the possibility to expand the applicability of commercial supported metallic catalysts and electrocatalysts through retrofitting via phosphorization.
Original language | English |
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Article number | 141923 |
Journal | Electrochimica Acta |
Volume | 443 |
DOIs | |
State | Published - Mar 1 2023 |
Funding
This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). A.M.D. is grateful to the Xunta de Galicia for the postdoctoral fellowship (ED481B 2019/091). Yu.V.K. thanks the Portuguese Foundation for Science and Technology (FCT) for the support under the CritMag project ( PTDC/NAN-MAT/28745/2017 ). A.S. is gratefully acknowledge financial support from the Oak Ridge National Laboratory SEED 10609 project “Single-Atom Catalysts for CO 2 Conversion”. A.S. and G.M. are gratefully acknowledge sampling rhenium chemicals from MOLYMET S.A. (Chile).
Funders | Funder number |
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U.S. Department of Energy | |
Oak Ridge National Laboratory | 10609 |
Fundação para a Ciência e a Tecnologia | PTDC/NAN-MAT/28745/2017 |
Xunta de Galicia | ED481B 2019/091 |
Keywords
- Bimetallic
- Durability
- Microstructure
- Overpotential
- Phosphides
- Tafel slope
- Transition metals