3D ternary Ni_xCo_2−xP/C nanoflower/nanourchin arrays grown on HCNs: a highly efficient bi-functional electrocatalyst for boosting hydrogen production via the urea electro-oxidation reaction

Abstract

<p>Over the last years, substantial efforts have been made to develop earth-abundant bi-functional catalysts for urea oxidation and energy-saving electrolytic hydrogen production, due to their low cost and potential to...</p>

Interconnected Mn-Doped Ni(OH)2 Nanosheet Layer for Bifunctional Urea Oxidation and Hydrogen Evolution: The Relation between Current Drop and Urea Concentration during the Long-Term Operation

“…Precious metal catalysts such as Pt and Rh are representative UOR catalysts, but their high cost limits their large-scale commercial application. ,, Transition-metal catalysts (Fe, Co, Ni, etc. ) − have shown promises to replace noble metal catalysts. Recent studies show that the catalytic performance of Ni is comparable to or even better than those of noble metals.…”

Co(OH)2 Nanosheets Array Doped by Cu2+ Ions with Optimal Electronic Structure for Urea‐Assisted Electrolytic Hydrogen Generation

“…Considering the potential for the oxidation of Co 2 + to Co 3 + is lower than that of Ni 2 + to Ni 3 + , the Co-based materials are more likely favorable for UOR electrocatalysis. Although several Co-based materials, including layer double hydroxides (LDH), [17,18] chalcogenides, [7,19] and phosphides, [20] have been applied in urea-assisted electrolytic hydrogen generation, they still undergo the unsatisfactory electrocatalytic performances, especially at large current densities. Therefore, it is necessary to construct Co-based catalysts with optimal structure for high-performance electrocatalysis toward UOR and HER.…”

Reaction site exchange in hierarchical bimetallic Mn/Ni catalysts triggered by the electron pump effect to boost urea electrocatalytic oxidation

“…The UOR performance of the materials was studied in a typical three-electrode system. 36,37 Firstly, we investigated the electrochemical behavior of materials in 1 M KOH electrolyte without urea (OER). Linear sweep voltammetry (LSV) curves showed a small oxidation peak at 1.36 V (vs. RHE) (Fig.…”