Oxygen-nitrogen co-doped hollow carbon nanoparticle and preparation method therefor and application in electrosynthesis of hydrogen peroxide

A preparation method for an oxygen-nitrogen co-doped hollow carbon nanoparticle, comprising the steps of:

• adopting a plasma-enhanced chemical vapor deposition (PECVD) method:
• performing a first deposition on carbon nanoparticles in an oxygen-containing atmosphere, and obtaining oxygen-doped hollow carbon nanoparticles through ablation effect of oxygen-containing plasma;
• and
• performing a second deposition on the oxygen-doped hollow carbon nanoparticles in a nitrogen-containing atmosphere to obtain oxygen-nitrogen co-doped hollow carbon nanoparticles, wherein a surface graphite layer of the oxygen-nitrogen co-doped hollow carbon nanoparticles has a thickness of 5-100 atomic layers, and a cavity width of 5-50 nm;
• in the oxygen-nitrogen co-doped hollow carbon nanoparticles, a molar content of doped oxygen atoms is 1-12%, and a molar content of carbonyl oxygen atoms in the doped oxygen atoms in the oxygen-nitrogen co-doped hollow carbon nanoparticles is 0.5-3%;
• and the carbonyl oxygen has an X-ray photoelectron spectroscopy (XPS) binding energy (BE) BE=531.0 eV;
• a content x of the carbonyl oxygen atoms and an electrocatalytic activity y satisfy following functional relationship:
• y=0.058x+0.61, with R2=0.90;
• where y is calculated by a half-wave potential E1/2 in volts (V) versus (vs.) a reversible hydrogen electrode (RHE);
• in the oxygen-nitrogen co-doped hollow carbon nanoparticles, a molar content of doped nitrogen atoms is 14%, a molar percentage of pyridine nitrogen and pyrrole nitrogen in the doped nitrogen atoms is 50-80%, and a molar ratio of the pyridine nitrogen and the pyrrole nitrogen is 0.5:1-2:1;
• the oxygen-containing atmosphere comprises one or more of oxygen-argon, carbon dioxide-argon, or water vapor-argon;
• the nitrogen-containing atmosphere comprises nitrogen or ammonia;
• and
• conditions of the first deposition and the second deposition independently comprise:
• plasma radio frequency (RF) power of 100-500 W, vacuum degree of 10-100 Pa, sample tube rotation speed of 50-100 rpm, temperature of 300-500° C., and time of 10-60 min.