One-pot synthesis of Fe/N/S-doped porous carbon nanotubes for efficient oxygen reduction reaction

Abstract

Fe/N/S-doped porous carbon nanotubes with efficient oxygen reduction reaction catalytic activity were prepared by making full use of the multifunctional roles of FeCl3.

Solid‐State Hybrid Supercapacitor Assembled from a Heterostructured Co−Ni Battery‐like Cathode and Supercapacitor‐Type Highly Disordered Carbon Nanosheets

“…[17] For S 2p spectrum ( Figure S5c), there are two peaks located at 168.5 and 163.9 eV correspond to the C-SO x -C and C-S-C species. [53,54] The O 1s spectrum in Figure S5d [51,55] The above results clearly verified that the obtained carbon material exhibits great advantages in its enlarged specific surface area, controllable surface compositions and physical structure, easy to introduce pseudocapacitive reactions. The polyatomic doping effect and proper porous structure of the ACNS sample make it to be a competitive candidate as a SC-typed anode material for energy conversion and storage applications.…”

“…The high‐resolution XPS spectrum of N 1s was fitted by four component peaks allot to pyridinic‐N (N‐6), pyrrolic‐N (N‐5), quaternary‐N (N−Q) and pyridine‐N‐oxide (N−X), and these peaks located at 398.1, 400.3, 401.2 and 402.7 eV, respectively (Figure S5b) . For S 2p spectrum (Figure S5c), there are two peaks located at 168.5 and 163.9 eV correspond to the C‐SO x ‐C and C‐S‐C species . The O 1s spectrum in Figure S5d displays four oxygen‐based groups including C=O quinone type groups (O‐I, 530.7 eV), C‐OH hydroxyl groups (O‐II, 532.4 eV), C‐O‐C ether groups (O‐III, 533.3 eV) and carboxyl groups (O‐IV, 534.3 eV) .…”

Iron‐Nitrogen Co‐doped Carbon with a Tunable Composition as Efficient Electrocatalysts for Oxygen Reduction

“…As for Fe 55 -NÀ C, the good linearity and parallelism plots from 0.3 V to 0.75 V suggest the first-order reaction kinetics, and the electron transfer number is calculated to be 3.94 which is very close to the theoretical value of 4.0. In order to further confirm the ORR Fe-N 4 SAs/NPC 0.5 -0.885 [32] Fe SA -NÀ C 0.28 -0.891 [33] SA-Fe/NG 0.24 -0.88 [34] Fe-SilkPNC 0.6 -0.853 [35] Fe/N/S-PCNT 0.1 0.96 0.84 [36] FeN x -PNC 0.14 1.00 0.86 [37] Fe SA -NÀ C 0.28 1.00 0.89 [38] Fe 0.25 -N/C-900 0.2 1.018 0.812 [39] Fe/P/C 0.5 -800 0.459 0.884 0.815 [40] CNT/PC 0.8 -0.88 [41] Fe@C-FeNCs-2 0.7 -0.899 [42] pathway, rotating ring-disk electrode (RRDE) measurement is carried out to detect peroxide yield. As demonstrated in Figure 5F, Fe 55 -NÀ C displays a near 4e À ORR pathway with low peroxide yield, demonstrating the high selectivity of Fe 55 -NÀ C toward 4e À pathway for ORR.…”

High‐performance N, P‐CNL nanocomposites as catalyst for oxygen reduction reaction in fuel cell

“…Currently, platinum‐based catalysts have been served as ORR catalysts, but they are difficult to be widely used due to their high price . Therefore, a nonnoble metal or metal‐free catalyst doped with a hetero atom (eg, N, P, B, S or I) meet the requirements of high thermal stability, good chemical stability, and excellent specific surface area.…”

“…Transition metal/heteroatom-doped carbon materials (MNCs) have become the most promising alternative to replace commercial platinum carbon (Pt/C) catalysts due to their low cost, wide range of raw materials, high activity, high stability, and resistance to methanol. 17,18 The combination of transition metal salts and nitrogen-doped carbon materials (such as nitrogen-doped carbon nanotubes, 5,[19][20][21][22] nitrogen-doped carbon nanofibers, 23,24 nitrogen-doped carbon spheres, [25][26][27][28] nitrogen-doped graphene, 13,[29][30][31][32][33] etc.) display superior performance according to the current research.…”