Nitrogen-inserted nickel nanosheets with controlled orbital hybridization and strain fields for boosted hydrogen oxidation in alkaline electrolytes

Abstract

With the crucial advantage of employing non-noble metal-based catalysts in alkaline solution, the anion exchange membrane fuel cell (AEMFC) has attracted growing attention as an economic device for hydrogen utilization....

d–sp orbital hybridization: a strategy for activity improvement of transition metal catalysts

“…in the p-block group into metal catalysts. 72,73 Wang et al reported N-inserted Ni nanosheets via carefully inserting N atoms in the Ni lattice with a well-maintained Ni phase for the boosted hydrogen oxidation reaction (HOR) in alkaline electrolytes. 72 The insertion of N in the Ni lattice induced strong d-sp orbital hybridization by the crystal orbital Hamiltonian population (COHP) and the projected density of states (pDOS) calculations (Fig.…”

Defect-activated surface reconstruction: mechanism for triggering the oxygen evolution reaction activity of NiFe phosphide

“…This is also in accordance with the in situ Raman characterization results, demonstrating that the defects accelerate the pre-catalyst surface reconstruction process. The contribution of the overlapping electronic states to the Ni-O bonding or antibonding orbitals was calculated using the crystal orbital Hamiltonian population (COHP), 47,48 as shown in Fig. 5c.…”

NiCoPd Inlaid NiCo-Bimetallene for Efficient Electrocatalytic Methanol Oxidation

“…The MOR in an alkaline media is selected as the probe reaction to investigate the catalytic performance of NiCoPd/NiCo-bimetallene. In contrast to the acid environment, an alkaline media can provide a less corrosive environment to the catalysts, and the abundant OH – in the alkaline media provide the sources of OH ads , thus improving the reaction speed of the oxidation step of methanol and CO intermediates. , The catalytic performance of the MOR is evaluated via assessing its mass activity, electrochemical active surface area (EASA), anti-CO poisoning ability, and stability. Considering that the importance of active Pd distribution in formed NiCoPd ternary-alloy is affected by aging time and temperature, these two parameters are investigated first.…”