Sulfurization-induced edge amorphization in copper–nickel–cobalt layered double hydroxide nanosheets promoting hydrazine electro-oxidation

Abstract

The electrocatalytic hydrazine oxidation reaction (HzOR) has drawn extensive attention due to its high energy conversion efficiency and wide applications in hydrazine-assisted water splitting and direct hydrazine fuel cells (DHFC).

Fabrication of a porous NiFeP/Ni electrode for highly efficient hydrazine oxidation boosted H2 evolution

“…45,46 Meanwhile, the concentration of Ni 3+ species with P-NiFeP/Ni is higher than that of Ni 2 P/Ni, which further reveals Fe-doping increase the unsaturation of Ni ions. 17 It is remarkable that the high-valence species enrichment can better promote electro-oxidation reactions 47,48,17, which helps to improve H z OR performance. In the Fe 2p spectrum of Fig.…”

“…[9][10][11] Therefore, it is imperative to choose a candidate that is more readily oxidation than OER to reduce energy wastage. Among many alternative OER (oxidation of methanol, 12 ethanol, 13 benzyl alcohol, 14 pentahydroxymethyl furfural (HMF), 15 urea, 16 and hydrazine, 17,18 etc. ), hydrazine oxidation reaction (H z OR) possesses ultra-low theoretical overpotential, single product, and safe environmental protection.…”

Development Trends on Nickel‐Based Electrocatalysts for Direct Hydrazine Fuel Cells

“…Surface sulfurization functionalized copper‐nickel‐cobalt ternary layered double hydroxides for HzOR with improved activity and durability has been reported by Liu et al [139] . The optimal ratio of ternary metal ions significantly affected the electronic structure and thereby HzOR activity and kinetics.…”

“…DFT calculations were also carried out to gain detailed information about the HzOR catalytic reactivity of CoNiÀ RÀ S (Ni 3 Co 6 S 8 ). [63] The estimated density of state for the Ni 3 Co 6 S 8 exhibited a semiconducting property and the energy bandgap was much lower than that of NiCo 2 O 4 counterpart, manifesting the enhanced charge mobility within the adopted Surface sulfurization functionalized copper-nickel-cobalt ternary layered double hydroxides for HzOR with improved activity and durability has been reported by Liu et al [139] The optimal ratio of ternary metal ions significantly affected the electronic structure and thereby HzOR activity and kinetics. The improved performance of the hybrid arisen from the combined features of enriched active species, enhanced charge transfer, and preferable reaction kinetics.…”

Investigation of hydrazine electrooxidation performance of carbon nanotube supported Pd monometallic direct hydrazine fuel cell anode catalysts

“…Furthermore, Asset et al reported that NiMo/C catalyst prepared via wet impregnation process method, exhibited better catalytic activity compared to Ni/C catalyst [30]. Liu et al reported that the ternary CuNiCo LDH nanosheet array catalyst prepared via sulfurization-induced edge amorphization exhibited good catalytic activity and power durability [31]. The catalysts and maximum peak values compiled from the literature studies for hydrazine electrooxidation were given in Table 1.…”