Ultrasonic-assisted hydrothermal synthesis of RhCu alloy nanospheres for electrocatalytic urea production

An ultrasonic-assisted hydrothermal method is proven to reduce the size of RhCu nanospheres and improves the electrocatalytic performance for urea synthesis with a high faradaic efficiency of 34.82% and a high urea yield rate of 26.81 mmol g −1 h −1 .