Electrochemical synthesis of Au-Ni(OH)2-nanocomposite on glassy carbon electrode as highly active bifunctional electrocatalyst for oxygen evolution and oxygen reduction reactions

A symmetric direct ammonia fuel cell using ternary NiCuFe alloy embedded in a carbon network as electrodes

“…A synergic effect between the metal and metal hydroxide accelerates high eletrocatalytic activity and fast electron transfer. 80 The structural changes before and after catalytic reactions were also confirmed by Raman spectra (Figure 4e). Compared to the original ternary alloy catalyst, the electrodes after AOR and ORR both presented two obvious Raman bands, which are located at 230-310 cm -1 and 460-600 cm -1 respectively.…”

“…A synergic effect between the metal and metal hydroxide accelerates high eletrocatalytic activity and fast electron transfer. 80…”

“…A synergic effect between the metal and metal hydroxide accelerates high eletrocatalytic activity and fast electron transfer. 80 The structural changes before and aer catalytic reactions were also conrmed by Raman spectra (Fig. 4e).…”

Tuning the Electronic Structure of a Ni-Vacancy-Enriched AuNi Spherical Nanoalloy via Electrochemical Etching for Water Oxidation Studies in Alkaline and Neutral Media

“…The deposition of a transition metal onto a highly electronegative Au support was proven theoretically by Greeley et al, and density functional theory (DFT) studies showed that the stabilization of higher oxidation states of transition-metal ions would be more effective while supported with Au than pure 3d transition metals . It was proven previously that, for any alloys of the various transition metals or post transition metals, each metal counterpart would play a specific role for improvising the electrochemical performance. , Theoretical calculation predicted that the combination of first higher series metal like Au, Pt, etc., would alter the adsorption energies by modifying the adsorption energies of the intermediates and also stabilizing the higher oxidation states of active first-row transition metals. − …”

UCoO4/Co3O4 Heterojunction as a Low-Cost and Efficient Electrocatalyst for Oxygen Evolution

“…At present, noble metals, such as RuO 2 and IrO 2 , have been considered the best OER catalysts, yet their high price, low abundance, and poor stability have badly affected their large-scale commercial application in electrolysis water hydrogen technology. − Currently, transition metal oxides/hydroxides have been identified as promising candidates for OER. , Particulate Co 3 O 4 has been widely explored due to its earth abundance, low cost, and good electrochemical performance. − For instance, Chen et al reported the synthesis of Co 3 O 4 for enhanced OER performance by shape control strategies . In general, the electrochemical activities of metal oxides are limited by their inherent weak conductivity. − To overcome this issue, great efforts have been made to increase the conductivity and electrochemical activities using noble metal-doped Co 3 O 4 , , Co 3 O 4 @MoS 2 , and carbon-supported Co 3 O 4 . − Cobalt-based sulfides, , phosphides, , and selenides , were also synthesized for water splitting. It has also been reported that the OER catalytic performance of cobalt-based oxides/hydroxides can be greatly enhanced by heterogeneous metal doping. , Recently, Se-doped cobalt oxide nanoparticles exhibited good OER catalytic performance by doping ratio control .…”