| abstract |
The invention provides a method for green preparation of Rh ultrathin nanosheets and low-crystallinity nanoparticles, and belongs to the field of metal nanomaterials. The preparation method comprises the following steps: (1) mixing ethylene glycol, polyvinylpyrrolidone, rhodium acetate dimer and urea, and performing ultrasonic dispersion to obtain a mixture A; (2) reacting the mixture A at the temperature of 160 ℃ for 0.5-10h to obtain a mixture B; (3) cooling the mixture B to room temperature, and centrifuging the obtained precipitate; (4) and (4) washing and drying the precipitate obtained in the step (3) to obtain the rhodium nano material. The preparation method is simple, does not relate to the use of CO gas and carbonyl metal compounds, and does not need other toxic additives. The prepared rhodium nano material has uniform appearance and stable structure, can be controlled to form low-crystallinity nano particles or ultrathin nano sheets by regulating the dosage of urea, and shows excellent catalytic activity and stability when applied to hydrogen evolution reaction. |