The role of catalyst–support interactions in oxygen evolution anodes based on Co(OH)₂ nanoparticles and carbon microfibers

Abstract

A set of OER electrodes based on Co(OH)2 nanoparticles and carbon microfibers of tailored composition is reported, which allows extracting valuable insights on the influence of the metal-support interface in their electrocatalytic performance.

Suberic Acid-Modified Y-Co(OH)2 Nanosheets with Cationic Vacancies for Efficient Oxygen Evolution Reaction

“…Figure c shows that the O 1s spectrum is decomposed into three peaks. The peak at 531.9 eV corresponds to Co–O–C, and the peaks at 530.5 and 528.5 eV correspond to O attached to hydroxyl hydrogen and metal, , demonstrating the presence of Co­(OH) 2 . The Y 3d spectrum (Figure d) has two peaks at 158.5 and 153.1 eV, corresponding to Y 3d 3/2 and Y 3d 5/2 .…”

Surface‐Functionalized Nanoparticles as Catalysts for Artificial Photosynthesis

“…Carboxylate groups are suggested to lower the activation free energy that leads to O 2 formation during OER under alkaline conditions (Table 1, entries 9–10). [ 117 ] Unfortunately, the low metal loading in the carbon support prevented further experimental characterization of the active species and their dynamics. In the same vein, Sun and co‐workers have recently reported on the proton transfer effects in the second coordination sphere of molecularly surface‐functionalized 1–4 nm NiO NPs and their partial relationship (together with electronic modulation, see Section 3) with their outstanding OER performance (Table 1, entries 3–8).…”

Synthesis of NiFeOx nanocatalysts from metal–organic precursors for the oxygen evolution reaction

“…In this respect, the organometallic synthesis method can provide appropriate answers as it allows obtaining metallic NPs with good control over size and surface state under mild conditions which have already been proved to be efficient nanocatalysts 23,24 including those used for water splitting. [25][26][27][28] We thus describe here a new approach to access Ni-Fe based nanocatalysts and discuss their OER activity under alkaline conditions as a function of their Ni/Fe ratio (2/1, 1/1 and 1/9) in comparison with their Ni and Fe counterparts as reference samples. First, Ni-Fe core-shell NPs were synthesized by the organometallic method under usual conditions (organic solvent and inert atmosphere) to control their size, morphology and structure.…”

“…In this respect, the organometallic synthesis method can provide appropriate answers as it allows obtaining metallic NPs with good control over size and surface state under mild conditions which have already been proved to be efficient nanocatalysts 23,24 including those used for water splitting. 25–28…”