Co‐Based Dual‐Metal Phosphides on P‐Activated Nickel Foam for Enhanced Hydrogen Generation from Ammonia Borane

Abstract Cobalt‐based monolithic phosphides are an attractive approach due to their stability and corrosion resistance properties for catalytic reactions. Herein, phosphourous ‐induced Co‐based dual active sites phosphides (Co ₂ P‐Ni ₂ P‐NC) are fabricated on phosphourous‐activated nickel foam (P‐NF) through the phosphorization method. The results confirm the uniform growth of Co ₂ P‐Ni ₂ P nanoparticles (NPs) with octahedral morphology embedded in the carbon‐nitrogen matrix. Co ₂ P‐Ni ₂ P NPs (9.26 nm) express prominent interfacial interaction and a strong electronic modulation through phosphorous (P) inducing. Thus, the dual active sites (Co ₂ P, Ni ₂ P) synergistically increase the catalytic activity of the optimized catalyst Co ₂ P‐Ni ₂ P‐NC with excellent efficiency for ammonia borane hydrolysis with hydrogen evolution ( r _B = 4495 mL min ⁻¹ g ⁻¹ _Co ), turnover frequency ( TOF = 1214.4 h ⁻¹ ), and apparent activation energy ( E _a = 36.17 kJ mol ⁻¹ ). The P‐activated nickel foam in Co ₂ P‐Ni ₂ P‐NC contributes significantly to increasing the catalytic activity of the as‐prepared catalysts. Thus, this work provides a rational design for developing a monolithic catalyst for industrial applications in the field of heterogeneous catalysis and sustainable energy.