Issue 10, 2022

Tracking the in situ generation of hetero-metal–metal bonds in phosphide electrocatalysts for electrocatalytic hydrogen evolution

Abstract

Transition metal phosphides (TMPs) have been intensively pursued in the field of hydrogen evolution reaction (HER) catalysts. The electrocatalytic performance of TMPs can be further improved by combining heteroatoms to manufacture bimetallic phosphides, which modifies the electronic structure and atomic configuration. To date, the knowledge of how synergistic effects could promote the high-efficiency catalyst at the atomic level is still largely inadequate. Herein, a Rux@CoP electrocatalyst was investigated to clarify the synergistic effect between Co sites and metallic Ru during the HER. Optimized Ru1.2@CoP exhibits the best catalytic activity in acidic solution, achieving a current density of 10 mA cm−2 at a low overpotential of 16 mV. Notably, by employing in situ X-ray scattering/diffraction and absorption spectroscopy, the generation of newly-formed Co–Ru bonds on Co sites is discovered during the HER. The in situ formation of the Co–Ru moiety suppresses the formation of metallic Co under HER conditions and dominates the catalytic behavior of bimetallic electrocatalysts.

Graphical abstract: Tracking the in situ generation of hetero-metal–metal bonds in phosphide electrocatalysts for electrocatalytic hydrogen evolution

Supplementary files

Article information

Article type
Paper
Submitted
09 mar 2022
Accepted
18 mar 2022
First published
19 mar 2022

Catal. Sci. Technol., 2022,12, 3234-3239

Tracking the in situ generation of hetero-metal–metal bonds in phosphide electrocatalysts for electrocatalytic hydrogen evolution

C. Tung, Y. Huang, C. Hsu, T. Chen, C. Chang, H. M. Chen and H. Chen, Catal. Sci. Technol., 2022, 12, 3234 DOI: 10.1039/D2CY00459C

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