Electrocatalytic hydrogen peroxide production in acidic media enabled by NiS₂ nanosheets

Abstract

The selective two-electron O2 reduction reaction (2e− ORR) represents a green, mild, and on-site means of synthesizing of H2O2. However, its practical feasibility depends on the development of advanced electrocatalysts,...

Enhanced catalytic performance of Pt by coupling with carbon defects

“…The number of electron transfer is about 3.95 for sample Pt-DPC in the range between 0.2 and 0.8 V versus RHE in Figure 4 F. The FE of H 2 O 2 production is below 5%. 29 , 30 , 31 , 32 This result confirmed a transfer reaction of almost four electrons during the ORR process. 33 …”

“…The FE of H 2 O 2 production is below 5%. [29][30][31][32] This result confirmed a transfer reaction of almost four electrons during the ORR process. 33 Finally, we performed DFT calculations to understand the influence of the Pt-C interface and topological defects on the ORR process.…”

Honeycomb Carbon Nanofibers: A Superhydrophilic O2‐Entrapping Electrocatalyst Enables Ultrahigh Mass Activity for the Two‐Electron Oxygen Reduction Reaction

“…The under‐developed direct H 2 O 2 synthesis from an H 2 –O 2 mixture is also potentially explosive [5] . Electrochemical two‐electron (2 e − ) oxygen reduction is regarded as an attractive alternative for on‐site direct H 2 O 2 production from O 2 and water at ambient conditions, and the devices can be powered by sustainable renewable electricity sources; however, it is challenged by strong competition from the four‐electron (4 e − ) oxygen reduction [6–9] . As such, it is in great need to design and develop efficient oxygen reduction reaction (ORR) electrocatalysts for selective production of H 2 O 2 via a 2 e − pathway.…”

Chemical Identification of Catalytically Active Sites on Oxygen‐doped Carbon Nanosheet to Decipher the High Activity for Electro‐synthesis Hydrogen Peroxide

“…[4,5] Furthermore,t his anthraquinone technique operating in centralized plants leads to the additional cost to transport H 2 O 2 .R ecently,d irect electrosynthesis H 2 O 2 through two-electron (2 e À )oxygen reduction reaction (ORR) driven by renewable electricity has been regarded as an emerging alternative to traditional anthraquinone process due to the environmentally friendly operation and on-site productivity. [6][7][8][9][10][11] In recent years,e normous efforts have been devoted to searching for cost-effective and high-performance electrocatalysts to produce H 2 O 2 . [12][13][14][15][16][17] Noble-based catalysts,such as Pd-based [18][19][20] and Pt-based [21,22] materials,s how high ORR activity and H 2 O 2 selectivity in wide range of pH, but their low abundance and high cost impede the large-scale commercial applications.R ecently,c arbon materials have been identified as the promising electrocatalysts for H 2 O 2 electrosynthesis owing to their low cost, high reusability and adjustable nanostructure/interface.…”