Ni-doped amorphous iron phosphide nanoparticles on TiN nanowire arrays: An advanced alkaline hydrogen evolution electrocatalyst

General Method for Synthesis Transition‐Metal Phosphide/Nitrogen and Phosphide Doped Carbon Materials with Yolk‐Shell Structure for Oxygen Reduction Reaction

“…This could also enhance the catalysts ORR performance during electrochemical processes . Another two peaks located at 130.01±0.2 eV and 129.16±0.2 eV are ascribed to the binding energy of P 2p 3/2 and P 2p 1/2 in metal bonded with phosphorus (P−M), which indicate the successfully formation of M 2 P (Fe 2 P, Co 2 P, Ni 2 P) . The Fe 2p, Co 2p and Ni 2p are also deconvoluted as shown in Figure D and Figure S8.…”

Highly Selective Electrochemical Reduction of CO2 to Alcohols on an FeP Nanoarray

“…The peaks at 713.9 and 727.8 eV are well fitted with two shakeup satellites . The P 2p region (Figure c) shows two peaks at 128.9 and 129.7 eV assigned to P 2p 3/2 and 2p 1/2 in FeP and the P−O species stem from surface oxidation of P in FeP after exposure to air . In the O 1s region (Figure d), the fitted peaks at 530.1, 531.4, and 532.6 eV are ascribed to lattice O, adsorbed O from surface hydroxy and/or adsorbed oxygen species, and O from the surface of absorbed H 2 O, respectively …”

“…In the Fe 2p spectra (Figure b), two binding energies at 706.5 and 719.3 eV correspond to 2p 3/2 and 2p 1/2 in FeP, respectively, and the two peaks at 710.6 and 724.1 eV are ascribed to Fe−O . The peaks at 713.9 and 727.8 eV are well fitted with two shakeup satellites . The P 2p region (Figure c) shows two peaks at 128.9 and 129.7 eV assigned to P 2p 3/2 and 2p 1/2 in FeP and the P−O species stem from surface oxidation of P in FeP after exposure to air .…”

“…The X‐ray photoelectron spectroscopy (XPS) survey spectrum for FeP (Figure a) shows the peaks of Fe and P with signals of C and O elements owing to contamination/surface oxidation of the product . In the Fe 2p spectra (Figure b), two binding energies at 706.5 and 719.3 eV correspond to 2p 3/2 and 2p 1/2 in FeP, respectively, and the two peaks at 710.6 and 724.1 eV are ascribed to Fe−O . The peaks at 713.9 and 727.8 eV are well fitted with two shakeup satellites .…”

Metal‐Organic Framework‐Derived Fe‐Doped Co1.11Te2 Embedded in Nitrogen‐Doped Carbon Nanotube for Water Splitting

“…It is worthy to mention that the Fe-Co 1.11 Te 2 @NCNTF-2 catalyst shown better electrocatalytic performance than the with the Fe-Co 1.11 Te 2 @NCNTF-3 with the highest Fe dopant, which may be due to the tremendous lattice boundaries after excess substitution of Fe for Co in Fe-Co 1.11 Te 2 @NCNTF-3 to decrease the electron mobility and to reduce the electrocatalytic activity. [57,58] To further investigate the HER kinetics, the Tafel slope of those samples were also evaluated (Figure 5b).The Fe-Co 1.11 Te 2 @NCNTF-2 catalyst showed the lowest Tafel slope of 73 mV dec À 1 , which was much smaller than that of undoped Co 1.11 Te 2 @NCNTF (180 mV dec À 1 ), Fe-Co 1.11 Te 2 @NCNTF-1 (126 mV dec À 1 ), and Fe-Co 1.11 Te 2 @NCNTF-3 (108 mV dec À 1 ) and was closed to that of the commercial Pt/C (47 mV dec À 1 ). The time-dependent current-time curve of Fe-Co 1.11 Te 2 @NCNTF-2 ( Figure 5c) was negligibly declined over 18 h, indicating that the Fe-Co 1.11 Te 2 @NCNTF-2 owned the excellent electrochemical stability in alkaline electrolyte for HER.…”