Summary: Impartial electrosynthesis of H2O2 by way of 2e- ORR is engaging for a lot of purposes, however the low exercise and excessive price of electrocatalysts have grow to be necessary constraints. Due to this fact, creating low-cost and environment friendly electrocatalysts for 2e- ORR is important. Herein, transition metallic single atoms (TM SA) embedded in g-C3N4 nanosheets (CNNS) have been obtained. The introduction of TM SA will increase the N-C=N content material and reduces the C-C/C=C content material in CNNS, which contributes to the elevated selectivity of 2e- ORR of TM SA/CNNS. As well as, TM SA is the principle motive for the improved exercise of 2e- ORR. Primarily based on the outcomes by changing a sequence of TM SA, Ni0.10 SA/CNNS with optimum N-C=N content material reveals the most effective selectivity (~98%) and highest yield of H2O2 (~503 mmol gcat-1 h-1), which is ~14.6 occasions increased than that of CNNS (~34.4 mmol gcat-1 h-1). And different TM SA/CNNS additionally reveals excessive exercise and selectivity. This examine demonstrates the flexibility of TM SA to modulate the selectivity and exercise of CNNS, making it a promising candidate for 2e- ORR and offering extra reference concepts for the preparation of H2O2.
