Stable and selective electrosynthesis of hydrogen peroxide and the electro-Fenton process on CoSe₂ polymorph catalysts

Abstract

Electrochemical synthesis of hydrogen peroxide (H2O2) in acidic solution can enable the electro-Fenton process for decentralized environmental remediation, but robust and inexpensive electrocatalysts for the selective two-electron oxygen reduction reaction...

Simultaneously Tuning Band Structure and Oxygen Reduction Pathway toward High‐Efficient Photocatalytic Hydrogen Peroxide Production Using Cyano‐Rich Graphitic Carbon Nitride

“…Hydrogen peroxide is a versatile and ecofriendly oxidant with wide applications in disinfection, chemical industry, and environmental remediation. [ 1 ] Currently, over 95 % of H 2 O 2 is produced via the indirect oxidation of anthraquinone, [ 2 ] which is waste‐ and energy‐intensive. [ 3 ] Photocatalytic production of H 2 O 2 via two‐electron oxygen reduction (2e − ORR) is a greener alternative, because it uses water and oxygen as the basic building chemicals and sunlight as energy input.…”

N-doped carbon nanotubes supported CoSe2 nanoparticles: A highly efficient and stable catalyst for H2O2 electrosynthesis in acidic media

“…In general, noble-metal based catalysts remain the most active for acidic 2e − ORR [27][28][29], but the scarcity impedes the widespread use. Transition metal chalcogenides featuring with tunable electronic and crystal structures [30][31][32] have attracted increasing attention in the field of 2e − ORR [33][34][35][36]. Recent study from Jin's group shows that CoSe2 is efficient to catalyze the 2e − ORR [35].…”

“…Transition metal chalcogenides featuring with tunable electronic and crystal structures [30][31][32] have attracted increasing attention in the field of 2e − ORR [33][34][35][36]. Recent study from Jin's group shows that CoSe2 is efficient to catalyze the 2e − ORR [35]. Interestingly, it suggests that orthorhombic CoSe2 shows superior activity over its cubic counterpart and the crystal structures can be tuned by varying the annealing temperatures for catalyst preparation.…”

Scaling-up of microbial electrosynthesis with multiple electrodes for in situ production of hydrogen peroxide

“…Hydrogen peroxide (H 2 O 2 ) is a green and environment-friendly oxidant that has been widely used in industrial and environmental applications ( Kelly et al., 2019 ; Sheng et al., 2020 ; Zhao et al., 2020 ). According to statistics, the world's H 2 O 2 production capacity exceeded 5 million tons in 2015 and maintained steady growth, most of which were synthesized based on the anthraquinone method, which has the disadvantage of high energy consumption and high-risk coefficient ( Sheng et al., 2020 ; Zhao et al., 2020 ). In addition, due to the unstable chemical properties of H 2 O 2 , this also provides challenges for transportation and storage and correspondingly increases costs ( Chen et al., 2018 ).…”