Boosted electrocatalytic hydrogen production by methylene blue and urea and synergistic electrooxidation degradation

Recent Advancements in Electrochemical Hydrogen Production via Hybrid Water Splitting

“…[ 89 ] Lately, Teng and co‐workers reported a paired electrolysis for H 2 production and electro‐oxidation degradation of urea and MB simultaneously. [ 30 ] As displayed in Figure a, the prepared α‐MoO 3 catalyst presented higher current densities after adding MB or urea in 1.0 m KOH, indicating improved anode oxidation kinetics. At a current density of 40 mA cm −2 , the UOR||HER and MB oxidation reaction (MOR)||HER systems only required low cell voltages of 1.611 and 1.597 V, which were reduced by 16.53% and 17.56%, respectively, compared to the pure water electrolysis (1.93 V).…”

“…integrated with HER, which can make the best of both worlds. [22][23][24][25][26][27][28][29][30][31] Thereinto, the rational design and fabrication of electrocatalysts is of significance for improving catalytic activity and stability, with particular emphasis on the anode catalysts. The performance of recently reported electrocatalysts for the typical sacrifice oxidation coupled with HER under alkaline conditions is summarized in Table 1.…”

“…[87,88] Equally importantly, many organic pollutants are more prone to deep oxidation to produce CO and CO 2 than water, so in addition to the hydrazine, urea, ammonia mentioned before, methylene blue, phenol, and formaldehyde could also be used as the suitable anodic sacrificial agents. [27][28][29][30][31] As a result, combining the organic pollutant degradation and electrochemical H 2 preparation is a promising strategy.…”

“…(a–c) Reproduced with permission. [ 30 ] Copyright 2021, Elsevier. (d–f) Reproduced with permission.…”

NiCo2O4 nano-needles as an efficient electro-catalyst for simultaneous water splitting and dye degradation

“…Overall, this approach is promising for treating dye-contaminated wastewater because it is ecofriendly and energy-efficient, achieving high removal rates while producing minimal byproducts. 41 A possible mechanism of OER along with MB degradation is as follows:…”