Hydrogen evolution under large-current-density based on fluorine-doped cobalt-iron phosphides

Tailoring electron transfer with Ce integration in ultrathin Co(OH)2 nanosheets by fast microwave for oxygen evolution reaction

“…The smaller R CT value of Ce 0.21 @Co(OH) 2 indicates faster electronic transfer and better OER performance. Combined with XPS, electrochemical measurements with the literature reported, it can be reasonably ascribed to the ''d-f electronic ladders" formed between CeO x and Co species, in which the electrons rapidly bounce back to the Co(OH) 2 layer after diving to the Ce-4f orbitals, therefore realizing efficient electron transmission [24]. All the results suggest that the synergy between ultra-thin Co(OH) 2 sheets and CeO x has facilitated the OER activity.…”

“…S6c). Among them, O1 at 531.3 eV comes from the oxygen defect on the surface, O2 at 530.8 eV is mainly hydroxyl oxygen connected with Co and a small amount of surface adsorbed oxygen, and O3 at 529.7 eV represents oxygen bound to metal [24,35,36]. Notably, the apparent increase of relative intensity ration of O1 and O3 peaks could be the logical result of Ce introduction.…”

“…Nevertheless, how to improve the dispersion of CeO x in Co(OH) 2 to maximize its electronic tuning role still remains a problem. Among all kinds of morphologies, ultra-thin nanosheets can increase active sites, accelerate material transfer and promote OER reaction with the coordination unsaturated metal sites [22][23][24]. However, the unexpected lumping of Co(OH) 2 nanosheets in time-consuming synthesis process, which could seriously reduce the dispersion of doped metals and active sites, is still a problem that needs to be explored continuously.…”

AlP-regulated phosphorus vacancies over Ni–P compounds promoting efficient and durable hydrogen generation in acidic media

“…At present, enormous efforts are devoted to exploiting first-row 3d transition metal-based materials including transition metal nitrides (TMNs), 8,9 borides (TMBs), 10,11 carbides (TMCs), 12,13 sulfides (TMSs), 14,15 and phosphides (TMPs) 16–18 to enhance the catalytic activity of HERs. Especially, the TMPs possess a greater potentiality due to the polarization of the phosphorus terminal that can lead to partial negative charges of phosphorus centres, and thus, be conducive to the adsorption of protons.…”

Constructing Complementary Catalytic Components on Co4N Nanowires to Achieve Efficient Hydrogen Evolution Catalysis

“…[ 9–11 ] Given the long working lifetime of alkaline electrolyzers and the excellent chemical stability in the alkaline condition of most transition metal‐based compounds, extensive efforts have been devoted to developing non‐noble metal‐based HER catalysts with comparable catalytic performance with Pt to solve the cost issue of catalysts. [ 12–14 ]…”