Electrochemically induced dilute gold-in-nickel nanoalloy as a highly robust electrocatalyst for alkaline hydrogen oxidation reaction

Optimizing Nickel Orbital Occupancy via Co‐Modulation of Core and Shell Structures to Accelerate Alkaline Hydrogen Electro‐Oxidation Reaction

“…Examining the highresolution Ni 2p XPS spectra in Figure 3c, both Ni 93 Cu 7 @NC and Ni@NC samples exhibit three components centered at 852.5, 854.3, and 856.0 eV, corresponding to Ni 0 , Ni 2+ ─O, Ni 2+ ─OH, respectively. [15] A noteworthy shift of 0.3 eV to higher binding energy in the Ni 0 peaks of Ni 93 Cu 7 @NC and Ni@NC, compared to Ni 93 Cu 7 (Table S4, Supporting Information), suggests electron donation from the metallic core nanoparticles to the carbon coating layer. Further integration of peak areas reveals a higher relative Ni 0 content in the Ni 93 Cu 7 @NC sample (17.2%) compared to Ni@NC (10.4%) and Ni 93 Cu 7 (13.2%), indicative of robust antioxidation properties (Table S5, Supporting Information).…”

Hydrogen oxidation electrocatalysts for anion-exchange membrane fuel cells: activity descriptors, stability regulation, and perspectives

“…35,100 Alloying 3d-transition metals (V, Fe, Co, and Ni) with PGMs to engineer binary alloys can also improve the HOR activity. 190,251 Furthermore, alloying has been applied to modify the intrinsic electronic properties of Ir-based catalysts, exemplified by Pd 0.33 Ir 0.67 , 106 IrRu, 252 IrRh, 220,253 IrMo 0.59 , 206 and IrNi. 207 For instance, Luo et al prepared IrMo 0.59 nanocatalysts, showcasing significant alkaline HOR activity attributed to effective OH adsorption arising from electronic interactions between Ir and Mo.…”

Revealing the role of a bridging oxygen in a carbon shell coated Ni interface for enhanced alkaline hydrogen oxidation reaction

“…21–24 Despite the fact that great efforts have been achieved, it is still a great challenge to precisely design Ni-based electrocatalysts with high activity and stability for alkaline HOR. 25,26…”