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Electronic Structure and d-Band Center Control Engineering over Ni-Doped CoP₃ Nanowall Arrays for Boosting Hydrogen Production.

ABSTRACT: To address the challenge of highly efficient water splitting into H₂, successful fabrication of novel porous three-dimensional Ni-doped CoP₃ nanowall arrays on carbon cloth was realized, resulting in an effective self-supported electrode for the electrocatalytic hydrogen-evolution reaction. The synthesized samples exhibit rough, curly, and porous structures, which are beneficial for gaseous transfer and diffusion during the electrocatalytic process. As expected, the obtained Ni-doped CoP₃ nanowall arrays with a doping concentration of 7% exhibit the promoted electrocatalytic activity. The achieved overpotentials of 176 mV for the hydrogen-evolution reaction afford a current density of 100 mA cm^-2, which indicates that electrocatalytic performance can be dramatically enhanced via Ni doping. The Ni-doped CoP₃ electrocatalysts with increasing catalytic activity should have significant potential in the field of water splitting into H₂. This study also opens an avenue for further enhancement of electrocatalytic performance through tuning of electronic structure and d-band center by doping.

SUBMITTER: Qi J

PROVIDER: S-EPMC8233895 | biostudies-literature |

REPOSITORIES: biostudies-literature

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