MoC based Mott–Schottky electrocatalyst for boosting the hydrogen evolution reaction performance

Abstract

Searching for promising HER electrocatalysts is an urgent task for the practical application of hydrogen production by water electrolysis.

Co/MoC Nanoparticles Embedded in Carbon Nanoboxes as Robust Trifunctional Electrocatalysts for a Zn–Air Battery and Water Electrocatalysis

“…The resulting N and C elements arise from the pyrolysis of PDA coating and organic linker in ZIF-67. Figure e exhibits four major subunits with binding energies at 284.5, 285.2, 286.1, and 288.3 eV, which can be indexed to Mo–C, CC/C–C, C–O/CN, and C–N/CO, respectively . The N 1s spectrum shown in Figure f displays five fitted signals, where the peaks at 398.5 and 399.3 eV may be associated with the P6–N (pyridinic-N, 31.34%) and Co–N (25.09%), respectively, which further proves the formation of Co–N species in the sample. , The XPS bands located at 400.5, 401.1, and 402.8 eV correspond to the presence of P5–N (pyrrolic-N, 19.57%), G6–N (graphitic-N, 18.23%), and oxygenated N (5.67%), respectively.…”

“…Figure 1e exhibits four major subunits with binding energies at 284.5, 285.2, 286.1, and 288.3 eV, which can be indexed to Mo−C, CC/C−C, C−O/CN, and C−N/CO, respectively 50. The N 1s spectrum shown in Figure1fdisplays five fitted signals, where the peaks at 398.5 and 399.3 eV may be associated with the P6−N (pyridinic-N, 31.34%) and Co−N (25.09%), respectively, which further proves the formation of Co−N species in the sample 47,51.…”

Interfacial La Diffusion in the CeO2/LaFeO3 Hybrid for Enhanced Oxygen Evolution Activity

“…Building hybrids is an efficient strategy in the electrocatalysis field, where the hybrids often display higher activity than their single-component counterparts. − It could combine the advantages of different materials and realize diverse synergistic effects to promote the OER. , In addition, the hybrids could also integrate specific active sites, which are responsible for different substeps for the multistep OER. , More importantly, the interaction between the two phases of a hybrid offers a new opportunity for electronic structure regulation, and thus, it could enhance the intrinsic activity of active sites. , Interfacial electron coupling in various types of hybrid electrocatalysts has been reported, such as metal oxide/metal oxide, metal oxide/metal, , and metal oxide (or metal)/carbon. , The interfacial electron transfer between two phases is suggested to play a key role in facilitating the OER by tuning the local electron density, , creating defects, , or increasing the electron mobility . In addition to the electron transfer, elemental redistribution between two phases is possible at the interface of hybrids.…”

“…12,13 Interfacial electron coupling in various types of hybrid electrocatalysts has been reported, such as metal oxide/ metal oxide, 14 metal oxide/metal, 12,15 and metal oxide (or metal)/carbon. 16,17 The interfacial electron transfer between two phases is suggested to play a key role in facilitating the OER by tuning the local electron density, 7,18 creating defects, 14,19 or increasing the electron mobility. 20 In addition to the electron transfer, elemental redistribution between two phases is possible at the interface of hybrids.…”

Coaxial Ni–S@N-Doped Carbon Nanofibers Derived Hierarchical Electrodes for Efficient H2 Production via Urea Electrolysis

“…As control groups, Pt/C and Ir/C were also used as the cathode and anode. The inks of Pt/C and Ir/C were prepared by the recipe in our previous work. − Besides, two pieces of clean NF (1.5 cm × 1 cm) served as both electrodes in the same two-electrode setup for comparison. Then, the stability was examined using the carbon cloth as the counter electrode and the free-standing electrode as the working electrode at a current density of 20 mA cm –2 for 20 h. The working electrode of noble metal loaded on NF (0.5 mg cm –2 ) was also compared to estimate stability under the same conditions.…”