Heterostructured Ni–Mo–N nanoparticles decorated on reduced graphene oxide as efficient and robust electrocatalyst for hydrogen evolution reaction

Recent developments on transition metal–based electrocatalysts for application in anion exchange membrane water electrolysis

“…Catalytic stability for HER and OER is measured using means of accelerated degradation tests, in chronopotentiometry or chronoamperometry at a fixed potential or current density as low as 10 mA/cm 2 to as high as 1000 mA/cm 2 for limited durations up to 500 hours. [88][89][90] Stability is also determined through cyclic voltammetry (CV) within high and low potential limit for several cycles (>1000 cycles). 11,73 Often in the literature, the variety of transition metal-based HER and OER catalysts reported good overall stability with little to no significant changes to current density or overpotentials under alkaline conditions (≤1 M KOH).…”

“…Numerous studies also conducted AEMWE performance test analysis to determine their feasibility and durability in the actual system. 65,70,88,109,[116][117][118] NiCo-based catalysts are found to be attractive as HER cathode catalysts owing to the role of Co in enhancing the active surface area and catalytic activity of Ni. 10,61,109,119,120 The synergistic effect from the interaction between Ni and Co may decrease the energy barrier for H OH bond dissociation to accelerate the Volmer step.…”

“…Nitrogen (N) doping or the NiMo nitride catalysts are also beneficial for HER due to their potential in lowering the overpotential at high current density and improving water molecule adsorption. 12,88,126 Chen and Hu 12 utilized the amino group-containing NiMo (denoted as NiMo-NH 3 /NH 2 ) as HER catalyst and iron-containing Fe-NiMo-NH 3 /NH 2 as the OER catalyst. Interestingly, the Tafel slope of the hierarchical NiMo-NH 3 /NH 2 nanosheets was as low as 35 mV/dec, indicating a highly active HER that is comparable to the Pt/C.…”

Revealing the effect of electrocatalytic performance boost during hydrogen evolution reaction on free-standing SWCNT film electrode

“…Recently, various carbon (nano)materials and their composites with non-noble metals (especially nickel and cobalt) emerged as a promising class of highly active HER electrocatalysts. For example, high performance in alkaline HER was achieved using Ni 3 Fe nanoparticles combined with N-doped carbon nanotube–grafted carbon nanofibers (CNFs) 10 , Ni–Mo–N nanoparticles decorated on reduced graphene oxide (rGO) 11 , and Fe 3 C-Co nanoparticles encapsulated in N-doped carbon 12 . These materials offer low HER overpotentials, which are already competitive.…”

In-situ Formation of Amorphous Co-Al-P Layer on CoAl Layered Double Hydroxide Nanoarray as Neutral Electrocatalysts for Hydrogen Evolution Reaction

“…Hydrogen has been regarded as one of the most ideal candidates because of its high energy density and zero-carbon emissions (Sun et al, 2018;Chi et al, 2019;Fei et al, 2020;Zhu et al, 2020), and abundant efforts have been devoted to exploring appropriate strategies for hydrogen production. Up to date, it is wellestablished that water electrolysis is a promising and environmentally friendly approach to produce highly pure hydrogen (Wang et al, 2018a;Hu et al, 2019;Chen et al, 2020a;Xue et al, 2020). Nowadays, it is highly attractive to develop and construct active and stable electrode catalysts which make the hydrogen evolution reaction (HER) more energy efficient.…”