FeNiMo trimetallic nanoparticles encapsulated in carbon cages as efficient hydrogen evolution reaction electrocatalysts

Abstract

This paper reports a cheap and feasible way to synthesize the carbon cages encapsulating FeNiMo compounds exhibiting satisfactory HER activity.

Robust and promising hydrogen and oxygen evolution reactions by a nanostructured bifunctional FeCoPd alloy electrocatalyst

“…In the acid electrolyte, H + ions were reduced by the electrons to form H atoms and they were adsorbed on the active catalyst surface following the Volmer reaction (M + H 3 O + + e − → MH ads + H 2 O), where M is the active surface site, 1,2,58,59 followed by either the electrochemical desorption Heyrovsky reaction (MH ads + H 3 O + + e − → M + H 2 + H 2 O) or chemical desorption Tafel reaction (2MH ads → 2M + H 2 ). 60 The reported theoretical Tafel slope of the Volmer, Heyrovsky and Tafel reactions are −120, −40 and −30 mV dec −1 , respectively.…”

Integration of Nitrogen-Doped Graphene Oxide Dots with Au Nanoparticles for Enhanced Electrocatalytic Hydrogen Evolution

“…To confirm that the fabricated nanostructures are highly active catalysts, a comparison of the overpotential at 10 mA cm –2 with that of the recently reported electrocatalysts is shown in Figure e. ,− For clarity, the comparison of the reports was classified as carbon-based and metal–carbon-based catalysts. From these reports, − the overpotential range for the carbon-based catalysts varies from 490 to 710 mV (at 10 mA cm –2 ), which are higher values than NGODs (411 mV) and NGQDs (361 mV) in the present study.…”

“…Electrocatalytic hydrogen evolution performance. (a, b) LSV polarization curves of NGODs-AuNPs in comparison with NGQDs-AuNPs, pristine NGODs, NGQDs, AuNPs, glassy carbon (GC) electrode, and carbon powder in a 0.5 M H 2 SO 4 aqueous solution, and their corresponding (c) Tafel slopes, (d) mass activity (A/g) and overpotential (mV)@10 mV/cm 2 values, and (e) comparison of HER activity (overpotential (V vs RHE) vs current density @10 mA.cm –2 ) with various carbon and metal@carbon-based catalysts. ,− …”

Trimetallic Nanoparticles: Greener Synthesis and Their Applications

“…It was uncovered that the G-AuPd@Pd had improved catalytic activity, better stability, and high tolerance for these reactions, compared to the G-Pd (graphene supported Pd dendrites) or commercial Pd black catalysts [ 112 ]. In another study, a carbon cage-encapsulated Fe-Ni-Mo compound was synthesized and applied to electrocatalyze hydrogen evolution reaction [ 113 ]. This non-noble metal catalyst (with improved durability) demonstrated a significant electrocatalytic performance in both acidic (246 mV, 10 mA cm −2 ) and alkaline (199 mV, 10 mA cm −2 ) solutions.…”

“…This non-noble metal catalyst (with improved durability) demonstrated a significant electrocatalytic performance in both acidic (246 mV, 10 mA cm −2 ) and alkaline (199 mV, 10 mA cm −2 ) solutions. The advantage of this study was to find a promising approach to reduce the cost of the catalyst for the hydrogen evolution reaction by replacement of noble- metal catalysts by using efficient and durable non-noble metal catalysts [ 113 ]. Additionally, a facile and scalable strategy was designed for the production of N -doped bamboo-like carbon nanotubes decorated with trimetallic NPs to be employed for total water decomposition in alkaline electrolyte [ 114 ].…”