Heterogeneous Ni-Boride/Phosphide Anchored Amorphous B-C Layer for Overall Water Electrocatalysis.
ChemSusChem
; : e202301547, 2024 May 06.
Article
em En
| MEDLINE
| ID: mdl-38711383
ABSTRACT
The rational design of efficient and economical bifunctional electrocatalysts remained a challenge for overall water electrolysis. In this work, the Ni-boride/ phosphide particles anchored amorphous B-doped carbon layer with hierarchical porous characteristics in Ni foam (Ni3P/Ni3B/B-C/NF) was fabricated for overall water splitting. The Boroncarbide (B4C) power was filled and fixed in the NF interspace through the electroplating and electroless plating, and then annealed in vacuum high temperature. The amorphous B-C layer derived from the B4â
C not only speeded up the electron transport, but also cooperate with Ni-boride/phosphide to enhance the electrocatalytic activity for HER and OER synergistically. Furthermore, the hierarchical porous architecture of Ni3P/Ni3B/B-C/NF increased space utilization to load more active materials. The self-supported Ni3P/Ni3B/B-C/NF electrode possessed a low overpotential of 212 and 280â
mV to deliver 100â
mA cm-2 for HER and OER, respectively, and high stability for 48â
h. In particular, the electrolyzer constituted with the Ni3P/Ni3B/B-C/NF bifunctional electrocatalyst only required a voltage of 1.59â
V at 50â
mA cm-2 for water electrocatalysis under alkaline medium, and demonstrated long-term stability for 48â
h. This study provides a new technical path for the development of bifunctional of transition metal borides to promote the application of hydrogen production from water splitting.
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01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
ChemSusChem
Ano de publicação:
2024
Tipo de documento:
Article