Enhancement of catalytic properties and durability in Ni–B–P/Ni foam for hydrazine electrooxidation

• Published in: International journal of hydrogen energy Vol. 48; no. 62; pp. 23866 - 23876
• Main Authors: Wei, Xia, Dai, Hongbin, Li, Yanni, Wang, Tianyao, Li, Song
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 22.07.2023
• Subjects: Electrocatalysts; Electronic interaction; Hydrazine electrooxidation; Long-term durability; Ni–B–P/Ni foam; Long-term durability; Ni–B–P/Ni foam; Hydrazine electrooxidation; Electrocatalysts; Electronic interaction
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2023.03.225

Hydrazine is a promising energy carrier of high power density, high theoretical cell voltage, and zero carbon emission to replace fossil fuel-dominated energy sources. Herein, we present a new Ni–B–P/NF catalyst for hydrazine electrooxidation by a facile electroless plating process. The Ni–B–P/NF catalyst exhibits remarkable catalytic activity (290 mA cm−2 at 0.3 V) by combining merits of high intrinsic activity, large specific surface area, satisfactory conductivity, and lattice dislocation. Meanwhile, the Ni–B–P/NF catalyst provides excellent long-term durability (5000 s, 94.4%), which is at the leading level among the reported Ni-based electrocatalysts for hydrazine electrooxidation to date. It is found that the phosphorus-containing coating and its tight binding to the substrate contribute to the long-term durability of Ni–B–P/NF. XPS results and electron models are used to elucidate the electron transition mechanism of the Ni–B–P coating. This work presents a novel catalyst for hydrazine electrooxidation and demonstrates its promising application in energy storage and fuel cell systems. •The Ni–B–P/Ni foam was prepared by a facile electroless plating process.•The intrinsic active sites, specific surface area, conductivity and lattice dislocation affect the catalytic activity.•The oxidation resistance and bonding ability affect the durability.•The electron transference from Ni atoms to P atoms avoids the formation of Ni3(BO3)2 and improves the catalytic activity.