Mono-, bi- and tri-metallic platinum group metal-free electrocatalysts for hydrogen evolution reaction following a facile synthetic route

Abstract

In this work, platinum group metal-free (PGM-free) electrocatalysts were synthesized, characterized, and tested for hydrogen evolution reaction (HER). These materials were mono, bi and trimetallic Ni-based electrocatalysts with the addition...

Mono-, bi- and tri-metallic Fe-based platinum group metal-free electrocatalysts derived from phthalocyanine for oxygen reduction reaction in alkaline media

“…The main synthesis approach in this work was thermal treatment at high temperatures to prepare the electrocatalyst integrating the metallorganic molecule (Pc in this case) within the porous carbon acting as a backbone. 87 At the first step, to homogeneously mix the metal phthalocyanine of choice (FePc, NiPc, and CuPc) with KJ-Black carbon, a high-energy ball miller ( E max Retsch) with a rotation rate of 400 rpm was used for 20 min. The next step was the functionalization of the mixed samples through a thermal treatment at two different 600 °C and 900 °C temperatures in the controlled Ar gas atmosphere (UHP Ar at 100 cm 3 min −1 ).…”

Strain engineering of two-dimensional materials for energy storage and conversion applications

“…Noble metals exhibit superior electrocatalytic performance. However, their limited reserves and high costs have prompted the exploration of alternative options [46,120,121] . Two-dimensional materials have garnered significant attention in the realm of electrocatalysis due to their unique characteristics, such as ultrathin morphology, fully exposed surface atoms, and exceptional mechanical properties [122] .…”

Morphological and structural design through hard-templating of PGM-free electrocatalysts for AEMFC applications

“…17 The influence of temperature increments during pyrolysis has been elucidated, shedding light on the temperature's impact on the metal coordination, as well as the activity and durability of the derived electrocatalysts. [18][19][20] Inert atmospheres are more often used during pyrolysis; however, reducing atmospheres containing hydrogen or ammonia have also been reported to have a positive impact on the electrocatalyst performance. [21][22][23] To deal with their intrinsically low TOF, which is approximately two orders of magnitude lower than that of PGMs, 24,25 soft and hard templating strategies have been adopted to increase the porosity of electrocatalyst materials, and thus the active sites' utilization [26][27][28] as well as the electrochemically active site density (EASD).…”

“…17 The influence of temperature increments during pyrolysis has been elucidated, shedding light on the temperature's impact on the metal coordination, as well as the activity and durability of the derived electrocatalysts. 18–20 Inert atmospheres are more often used during pyrolysis; however, reducing atmospheres containing hydrogen or ammonia have also been reported to have a positive impact on the electrocatalyst performance. 21–23…”