Surface valence regulation of cobalt–nickel foams for glucose oxidation-assisted water electrolysis

Abstract

Oxygen plasma treatment can regulate the valence of surface metals in cobalt–nickel foam to promote electrocatalytic glucose oxidation coupled with hydrogen production.

Design of 2D nanomaterials (photo-)electrocatalysts for biomass valorization coupled with H2 production

“…Additionally, the Augustynski group 92 proposed a nanostructured WO3 photoanode for GOR coupled with HER, resulting in a variety of valuable products such as GLA, GUA, erythrose and arabinose. In this study, simultaneous GOR and HER at 1.23 V vs. RHE demonstrated a high photocurrent density of ca 6.5 mA cm −2 under stimulating AM 1.5 G. In another example, Wang et al 93 employed ultrafast oxygen plasma to modify commercial Co-Ni foam (CNF) to give CNF-60 a superhydrophilic surface for GOR and HER. Compared to the pristine CNF, CNF-60 yielded higher current density at applied potentials higher than 1.45 V (Figure 6h), suggesting more favorable mass transferring of glucose.…”

“…), (f) TEM image of morphological features of the exfoliated CoNW, (g) LSV curves of two-electrode system (CoNW/NFs ||CoNW/NFs) with and without HMF (Reproduced with permission from Ref 91. ), (h) LSV curves for GOR on CNF and CNF-60 , (i) LSV of CNF-60||CNF-60 system for GOR coupled with HER, (j) changes in the wetting behavior of the surface: (top row) pristine CNF and (down row) CNF after 60 minutes (CNF-60) of plasma exposure (Reproduced with permission from Ref 93. ), cross-section image of Ni (k) and NiSn20% (m), (n) current density as a function of cell voltages for NiSn20% in 1 M NaOH solution (absent lignin: blue plot and presence lignin: red plot) (Reproduced with permission from Ref 94.…”

Water electrolysis for hydrogen production: from hybrid systems to self-powered/catalyzed devices

“…In recent years, there has been growing interest in the coupling of the HER and the GOR on non-noble metal electrocatalysts, particularly Fe, Co, Ni, and Cu-based catalysts, such as Co@CoO heterojunctions, 441 CoNi foam, 442 NiCoSe x , 443 Ru@NiB, 444 amorphous NiFe-LDH, 445 NiFeO x , 446 Co/N-codoped carbon, 447 Co/CoP cluster, 448 2D NiCo phosphate nanosheets, 449 Cu/Cu 2 O, 450 and Fe 2 P/SSM. 451 Yu et al fabricated NiV LDH by electrochemical and N 2 /H 2 plasma regulations for boosting the activity of the GOR and HER.…”

Sustainable Photocatalytic Biological Cofactor Regeneration Fueled by Selective Alcohol Oxidation over Polarized ZnIn2S4

“…The addition of TEOA as hole scavengers severely inhibits the oxidation of benzyl alcohol, indicating the photogenerated hole is the dominant active species for substrate conversion. 52 In the presence of sacrificial electron acceptors, the maximum conversion rate of benzyl alcohol increases, indicating that rapid electron extraction is more favorable for the photoredox cycle. Moreover, in the in situ free radical trapping experiments, using 1,1-diphenylethylene and diphenylamine as additives, the conversion rates of benzyl alcohol were 47 and 85%, respectively.…”