Rattle-structured CuO/Co3O4@C microspheres, a potent bifunctional catalyst for hydrogen production from ammonia borane hydrolysis and methanolysis

Regulation of Electronic Structures of the Urchin‐Like NiCoP/CoP Nanocatalysts for Fast Hydrogen Evolution

“…[58,59] In the meantime, the peak of BÀ O bond at ~1332 cm À 1 is gradually growing with the progression of the reaction. [58] These observations indicate the cleavage of BÀ H bonds, which could contribute to the generation of hydrogen, and the formation of BÀ O bonds during the reaction. Besides, the peaks at ~1400, ~1637 and ~3471 cm À 1 assigned to NÀ H (OÀ H) vibrations do not show significant changes, revealing that no NÀ H bonds are broken during the hydrolysis reaction.…”

“…It can be seen that the peaks of BÀ H bonds at ~1177 and ~2343 cm À 1 diminish rapidly as the reaction time progresses from 0 to 7 min. [58,59] In the meantime, the peak of BÀ O bond at ~1332 cm À 1 is gradually growing with the progression of the reaction. [58] These observations indicate the cleavage of BÀ H bonds, which could contribute to the generation of hydrogen, and the formation of BÀ O bonds during the reaction.…”

Surface Ligand Modification on Ultrathin Ni(OH)2 Nanosheets Enabling Enhanced Alkaline Ethanol Oxidation Kinetics

“…According to the NS characterizations, we discovered that excess ODAM molecules were accumulatively adsorbed on the NS surface during the merging 28,30 On the other hand, the ODAM ads molecules were more randomly adsorbed among the anchored ODAM chem ligands, likely blocking the catalytically active sites. Discrete NSs were mostly covered with ODAM chem and thus had the most alcoholophilic surfaces 29 that were favorable for alcohol adsorption 28 and EOR kinetics. Although merged and continuous NSs also have rich active catalytic sites on their surfaces, the higher coverage of excess ODAM ads would significantly suppress the electrochemical reactions.…”

“…The bare Ni­(OH) 2 surface is less alcoholophilic , but more hydrophilic. − ODAM chem ligands anchored on the Ni­(OH) 2 NS surface during the ILE growth, and their hydrophobic tails were likely stretched to form a more alcoholophilic layer near the catalyst surface to improve the surface-selective sorption of ethanol. , On the other hand, the ODAM ads molecules were more randomly adsorbed among the anchored ODAM chem ligands, likely blocking the catalytically active sites. Discrete NSs were mostly covered with ODAM chem and thus had the most alcoholophilic surfaces that were favorable for alcohol adsorption and EOR kinetics. Although merged and continuous NSs also have rich active catalytic sites on their surfaces, the higher coverage of excess ODAM ads would significantly suppress the electrochemical reactions.…”

“…Owing to their structural advantages, 2D nanomaterials are commonly recognized as highly efficient catalysts. ,, Here, we show a substantially improved EOR from ultrathin Ni­(OH) 2 nanosheets (NSs) by tuning the surface adsorption rate between alcohol molecules and OH – . We utilized amphiphilic octadecylamine (ODAM) ligands to modify the surface of ultrathin Ni­(OH) 2 NSs via ionic layer epitaxy (ILE). − The ligands chemisorbed onto the NS surface can generate an alcoholophilic layer at the catalyst–electrolyte interface, leading to more favorable selective sorption − of alcohol molecules on the catalyst surface to enhance the EOR in competition with OER, resulting in more efficient alcohol oxidation. This result demonstrated a promising approach for improving the EOR selectivity in competition with the the OER by tuning the catalyst surface chemistry through rational ligand modification.…”