Amine-assisted synthesis of the Ni₃Fe alloy encapsulated in nitrogen-doped carbon for high-performance water splitting

Abstract

Developing efficient and robust catalyst for both oxygen evolution and hydrogen evolution reaction (OER, HER) is vital for the practical electrochemical water splitting. Herein, we proposed a tetraethylenepentamine (TEPA) induced...

Plasma‐Engraved Lattice‐Matched NiO/NiFe2O4 Heterostructure with Ample Oxygen Vacancies for Efficient Water Electrolysis and Zn‐Air Batteries

“…The full XPS spectra of NiO/NiFe 2 O 4 and Vo‐NiO/NiFe 2 O 4 display distinct signals corresponding to Ni, Fe, and O elements (Figure S4). The high‐resolution Ni 2p XPS spectra for NiO/NiFe 2 O 4 and Vo‐NiO/NiFe 2 O 4 (Figure 3d,g) reveal two spin‐orbit peaks of Ni 2p 3/2 and Ni 2p 1/2 which are attributed to Ni 2+ (854.4 and 872.1 eV) and Ni 3+ (856.3 and 874.1 eV), respectively [24,25] . Accompanying these, two shake‐up satellite peaks are observed at 861.5 and 879.7 eV [26] .…”

CoFeBP Micro Flowers (MFs) for Highly Efficient Hydrogen Evolution Reaction and Oxygen Evolution Reaction Electrocatalysts

“…First, the O 1s and C 1s are due to surface oxidation and reference calibration. The O 1s spectrum in Figure S46a shows three distinct peaks located at 532.1, 539.9, and 534.5 eV, corresponding to M-O, M-OH, and absorbed H 2 O, respectively (M=Co and Fe) [ 43 ]. The surface oxidation is inevitable due to air exposure, and C can always be observed along with reference calibration.…”

Anion-modulated CoP electrode as bifunctional electrocatalyst for anion-exchange membrane hydrazine-assisted water electrolyser

“…[7][8][9] However, one of the key challenges to improving its overall energy conversion efficiency is the development of effective electrocatalysts, especially for the high theoretical potential of the OER process. [10][11][12][13] Another viable path is to replace the conventional OER using another anodic process with lower theoretical potential, realizing the low overall cell voltage for AEMWE. In this regard, the HzOR (hydrazine + 4OH À -N 2 + 4H 2 O + 4e À , À0.33 V vs. RHE) process has been proven to be a promising alternative half-reaction.…”