Honeycomb-like phosphorus doped nickel/carbon: A highly efficient electrocatalyst for oxygen reduction to H2O2

Phosphorus doped hierarchical porous carbon: an efficient oxygen reduction electrocatalyst for on-site H2O2 production

“…The H 2 O 2 concentration was monitored by spectrophotometry using the Ce 4+ titration method (2Ce 4+ + H 2 O 2 → 2Ce 3+ + 2H + + O 2 ↑). 44 The tested electrolyte as a sample at a certain time (2 h) was collected and mixed with a standard Ce 4+ solution (0.15 mM) at a certain volume ratio. The absorbance of the above solution was then measured using a UV-vis spectrophotometer at an absorption wavelength of 318 nm.…”

Recent progress in electrocatalytic selectivity in heterogeneous electro-Fenton processes

“…−1 and an outstanding H 2 O 2 selectivity over 98% with decent electrochemical durability. 85 Other metal centers, such as Cu, could also provide good selectivity after optimized coordination sites. In situ X-ray absorption near-edge structure (XANES) and DFT calculation verified that the degree of OH* poisoning (ΔGOH*0) tuned by three –OH– coordinated Cu sites in amorphous structures plays a crucial role in selective catalysis.…”

Transition metal single atom-optimized g-C3N4for the highly selective electrosynthesis of H2O2under neutral electrolytes

“…7 Based on this, green and sustainable electrochemical synthesis (two-electron oxygen reduction reaction, 2e − ORR) that is powered by renewable electricity is highly sought-after for the direct on-site production of H 2 O 2 . 8 However, the electrochemical synthesis of H 2 O 2 is constrained by the four-electron oxygen reduction reaction (4e − ORR), 9 so electrocatalysts with high activity and selectivity are essential. At present, noble metal catalysts ( e.g.…”

“…7 Based on this, green and sustainable electrochemical synthesis (two-electron oxygen reduction reaction, 2e À ORR) that is powered by renewable electricity is highly sought-after for the direct on-site production of H 2 O 2 . 8 However, the electrochemical synthesis of H 2 O 2 is constrained by the four-electron oxygen reduction reaction (4e À ORR), 9 so electrocatalysts with high activity and selectivity are essential. At present, noble metal catalysts (e.g., Pt, Pd, Ag, Au, Pd-Hg, and Au-Pd) exhibit excellent selectivity and activity for the synthesis of H 2 O 2 [10][11][12][13][14][15][16] but these catalysts are expensive, scarce, and have inferior stability, which restrict their large-scale production.…”