Oxygenated P/N co-doped carbon for efficient 2e⁻oxygen reduction to H₂O₂

Abstract

In this work, a type of doped carbon material with rich edged P atoms co-functionalized by O and N atoms was synthesized via simple solvothermal treatment of P2O5 in formamide,...

Single‐Atom Catalysts for H2O2 Electrosynthesis via Two‐Electron Oxygen Reduction Reaction

“…It has many advantages including safe operation, clean production process, simple reaction under ambient conditions, and low energy consumption. [17][18][19] However, the electrochemical 2e − ORR normally suffers from high overpotential since the sluggish kinetics, and simultaneously along with the competing four-electron pathway to produce H 2 O (4e − ORR, O 2 + 4H + + 4e − → 2H 2 O). Therefore, exploring catalysts with efficient ORR activity and dominated 2e − selectivity is significant to the electrosynthesis of H 2 O 2 .…”

N4-Vacancy-Functionalized Carbon for High-Rate Li-Ion Storage

“…38,39 Their N 1s spectra can be divided into four species: pyridinic N (∼398.5 eV), pyrrolic N (∼400.1 eV), graphitic N (∼401.6 eV), and oxidized N (∼404.5 eV). 40,41 As compared in the deconvolutions of the N 1s spectra in Figure 2e, Zn 1 NC contains more pyridinic N, reaching a content of 7.86 atom %. While V-NC contains balanced pyridinic N (5.02 atom %) and pyrrolic N (4.95 atom %), the rearrangement of the N form is probably due to the binding energy of protonated pyridinic N shifting to a more positive position.…”

“…The Zn and N contents in Zn 1 NC are 3.12 and 13.71 atom %, respectively, while those in V-NC are 0.61 and 13.94 atom %, respectively. The deconvolutions of the C 1 s spectra indicate the presence of rich N-containing functionalities (Figure d), suggesting the presence of a C–C/CC substance (∼284.5 eV) and the functionalities of C–N/CN (∼286.2 eV) and CO (∼288.8 eV). , Their N 1s spectra can be divided into four species: pyridinic N (∼398.5 eV), pyrrolic N (∼400.1 eV), graphitic N (∼401.6 eV), and oxidized N (∼404.5 eV). , As compared in the deconvolutions of the N 1 s spectra in Figure e, Zn 1 NC contains more pyridinic N, reaching a content of 7.86 atom %. While V-NC contains balanced pyridinic N (5.02 atom %) and pyrrolic N (4.95 atom %), the rearrangement of the N form is probably due to the binding energy of protonated pyridinic N shifting to a more positive position. , The Zn 2 p spectra (Figure S4) of V-NC confirm that most of the Zn species have been removed compared to the Zn 2 p peak intensity of Zn 1 NC.…”

Hollow Carbon Cages Derived from Polyoxometalate‐Encapsuled Metal‐Organic Frameworks for Energy‐Saving Hydrogen Production

“…The HR‐XPS of C 1s can be fitted into six peaks: at 289.3, 287.5, 286.6, 285.5, 284.8 and 283.5 eV, which can be assigned to −COO, O=C, O−C, N−C, C−C, and W−C, respectively [66,70] . The HR‐XPS of P 2 p displayed four peaks: at 129.7, 130.6, 132.4 and 135.3 eV, ascribed to P 2p 3/2 , P 2p 1/2 , P−C and P−O, respectively, indicating that P was successfully doped into the carbon matrix, which could lead to good electrochemical kinetics [71,72] . The HR‐XPS spectrum of Zn 2 p (Figure S7) contained two major peaks at 1045.1 eV (Zn 2 p 1/2 ) and 1021.8 eV (Zn 2 p 3/2 ), which could be assigned to metallic Zn [73] .…”