Sodium tungsten bronze-supported Pt electrocatalysts for the high-performance hydrogen evolution reaction

Abstract

Based on the strong metal-support interaction, designing and constructing metal-support catalyst is an effective strategy to achieve unique electronic structures and modulate interface microenvironments for improving hydrogen evolution reaction (HER)...

A co-axial structure composed of RuO2 on defective N-doped carbon nanotubes as a highly efficient electrocatalyst for overall water splitting

“…3c), indicating that RuO 2 -DNCTs exhibit faster H 2 generation kinetics in comparison with both RuO 2 -CB and Ru-DNCTs. 40,41 From Fig. S8,† the exchange current density ( j 0 ) of RuO 2 -DNCTs is 8.91 mA cm −2 , larger than that of Pt/C (1.93 mA cm −2 ), Ru-DNCTs (2.04 mA cm −2 ) and RuO 2 -CB (3.31 mA cm −2 ).…”

Self-supported electrocatalysts for the hydrogen evolution reaction

“…248–253 Ascertaining that, our group directly fabricated Na x WO 3 nanotube bundle support on a stainless mesh (SM) substrate via a facile hydrothermal method, followed by anchoring Pt nanoparticles with a low load-level (1.44%) on the as-prepared Na x WO 3 nanotube bundles (Pt/R-Na x WO 3 @SM) via the in situ chemical reduction, successfully establishing Pt-sodium tungsten bronze hybrid electrocatalysts. 254 Specially, the Na x WO 3 nanotube bundles were synthesized without using additives and surfactants, and Na 2 S 2 O 8 reagent was employed as an acid source instead of the strong corrosive including HCl, HNO 3 , as well as H 2 SO 4 . As expected, owing to the nanotube bundle morphology with 3D structure and the strong metal–support interaction between Pt and Na x WO 3 , the optimized Pt/R-Na x WO 3 @SM-170 catalyst exhibited excellent HER performance with low overpotentials of 20 and 46 mV at 10 and 100 mA cm −2 , a small Tafel slope of 18.6 mV dec −1 , as well as good stability over 3000 CV runs and CA test for 25 h in 0.5 M H 2 SO 4 media.…”

“…[248][249][250][251][252][253] Ascertaining that, our group directly fabricated Na x WO 3 nanotube bundle support on a stainless mesh (SM) substrate via a facile hydrothermal method, followed by anchoring Pt nanoparticles with a low load-level (1.44%) on the as-prepared Na x WO 3 nanotube bundles (Pt/R-Na x WO 3 @SM) via the in situ chemical reduction, successfully establishing Pt-sodium tungsten bronze hybrid electrocatalysts. 254 Specially, the Na x WO 3 nanotube bundles were synthesized without using additives and surfactants, and Na 2 S 2 O 8 reagent was employed as an acid source instead of the strong corrosive including HCl, HNO 257 The as-synthesized FeOOH@Co 4 N/SSM hybrid electrocatalyst showed a low overpotential of 92 mV at 10 mA cm À2 , a small Tafel slope of 34 mV dec À1 , and excellent stability for the alkaline HER. DFT analyses indicated that the enhanced HER performance of FeOOH@Co 4 N was owing to the suitable e d of Co 4 N adjusted by the strong electronic interaction between Co 4 N and FeOOH.…”

B4C enhances the supported platinum DER/HER performance

“…The support has the role of dispersing and anchoring the active component, and the interaction force between different supports and the active component varies; thus, the choice of support is equally important. Carbides have been widely studied as typical electrocatalytic supports, 23,24 including carbides such as Mo 2 C, 25–28 WC, 29,30 TiC, 31 and Ni 3 C; 32 they have stronger interactions with metals than carbon, 33 and can provide stronger interaction forces. Among them, boron carbide (B 4 C) is a nonmetallic carbide; it is one of the most stable substances toward acid and has the advantages of a high melting point and good electrical conductivity.…”