Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

Advanced Energy Materials, Год журнала: 2024, Номер 14(30)

Опубликована: Май 27, 2024

Abstract Electrochemical water splitting is a promising technique for the production of high‐purity hydrogen. Substituting slow anodic oxygen evolution reaction with an oxidation that thermodynamically more favorable enables energy‐efficient Moreover, this approach facilitates degradation environmental pollutants and synthesis value‐added chemicals through rational selection small molecules as substrates. Strategies small‐molecule electrocatalyst design are critical to electrocatalytic performance, focus on achieving high current density, selectivity, Faradaic efficiency, operational durability. This perspective discusses key factors required further advancement, including technoeconomic analysis, new reactor system design, meeting requirements industrial applications, bridging gap between fundamental research practical product detection separation. aims advance development hybrid electrolysis applications.

Язык: Английский

---

Design and regulation of defective electrocatalysts

Chemical Society Reviews, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

This review focuses on the synthesis and characterization of defective electrocatalysts, internal correlation between defects catalytic activity, development application electrocatalysts in various fields.

Язык: Английский

---

Rational constructing 2D/3D p-n heterojunctions to modulate hydrogen evolution efficient pathways for enhances photocatalytic hydrogen production

Journal of Industrial and Engineering Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Июль 1, 2024

Язык: Английский

---

Unlocking clean energy: Exploring FeVO4 nanopebble thin film as an outstanding photoanode for efficient water splitting

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1002, С. 175391 - 175391

Опубликована: Июль 4, 2024

Язык: Английский

---

Piezoelectrical Hydrogel Containing Cationic Vacancies Bismuth Sulfide with Enhanced Sonodynamic/Nanozyme Activity for Synergistic Killing Bacteria and Boosting Osteoblast Differentiation

Journal of Materials Chemistry B, Год журнала: 2025, Номер 13(10), С. 3420 - 3436

Опубликована: Янв. 1, 2025

A piezoelectric nanozyme is a novel biomaterial with the integration of piezoelectricity and activity that has capability killing bacteria promoting cell responses under mechanical stimulus exhibits great prospects in tissue regeneration. Herein, bismuth sulfide (BS) cationic vacancies (VBS) was synthesized, which enhanced activities compared BS. Moreover, hydrogel VBS phenylboronic acid grafted sodium alginate-arginine (VBS-PSA) prepared. Triggered by ultrasound (US) high power (>0.5 W cm-2), VBS-PSA produces large amount reactive oxygen species (ROS) through both piezoelectricity-enhanced sonodynamic efficiency peroxidase-like (POD-like) activity, thereby displaying powerful antibacterial capability. However, low-power US (≤0.5 effect generates electrical signals significantly stimulate osteoblast (proliferation differentiation) enhance catalase-like (CAT-like) for scavengers ROS generation oxygen, creating favorable microenvironment growth. Our study presents strategy to apply hydrogels enhancing synergistically kill responses. The would have potential repair infected bone defects.

Язык: Английский

---

Rational design of precatalysts and controlled evolution of catalyst-electrolyte interface for efficient hydrogen production

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Фев. 22, 2025

The concept of precatalyst is widely accepted in electrochemical water splitting, but the role activation and resulted changes electrolyte composition often overlooked. Here, we elucidate impact potential-dependent for both using Co2Mo3O8 as a model system. Potential-dependent reconstruction results an electrochemically stable Co(OH)2@Co2Mo3O8 catalyst additional Mo dissolved MoO42− into electrolyte. Co(OH)2/Co2Mo3O8 interface accelerates Volmer reaction negative potentials induced Mo2O72− (from MoO42−) further enhances proton adsorption H2 desorption. Leveraging these insights, well-designed MoO42−/Mo2O72− modified achieves Faradaic efficiency 99.9% yield 1.85 mol h−1 at −0.4 V versus reversible hydrogen electrode (RHE) generation. Moreover, it maintains over one month approximately 100 mA cm−2, highlighting its industrial suitability. This work underscores significance understanding on evolution design. properties electrocatalysis crucial authors report efficient transition metal production by manipulating composition.

Язык: Английский

---

Unraveling the Impact of Oxygen Vacancy on Electrochemical Valorization of Polyester Over Spinel Oxides

Small, Год журнала: 2024, Номер unknown

Опубликована: Сен. 2, 2024

Abstract Electrochemical upcycling of end‐of‐life polyethylene terephthalate (PET) using renewable electricity offers a route to generate valuable chemicals while processing plastic wastes. However, it remains huge challenge design an electrocatalyst with reliable structure‐property relationships for PET valorization. Herein, spinel Co 3 O 4 rich oxygen vacancies improved activity toward formic acid (FA) production from hydrolysate is reported. Experimental investigations combined theoretical calculations reveal that incorporation V into not only promotes the generation reactive hydroxyl species (OH * ) at adjacent tetrahedral 2+ (Co2+ Td), but also induces electronic structure transition octahedral 3+ (Co3+ Oh) Oh), which typically functions as highly‐active catalytic sites ethylene glycol (EG) chemisorption. Moreover, enlarged Co‐O covalency induced by facilitates electron transfer EG OH via Co2+ Oh‐O‐Co2+ Td interaction and following C─C bond cleavage direct oxidation glyoxal intermediate pathway. As result, ‐Co catalyst exhibits high half‐cell oxidation, Faradaic efficiency (91%) productivity (1.02 mmol cm −2 h −1 FA. Lastly, demonstrated hundred gram‐scale formate crystals can be produced real‐world bottles two‐electrode electroreforming, yield 82%.

Язык: Английский

---

Delineating Catalyst Deactivation Mechanisms in Electrocatalytic Glycerol Oxidation toward Biodiesel Wastewater/CO₂ Co-valorization

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Фев. 7, 2025

Biodiesel plays a key role in achieving economy-wide decarbonization but its production discharges significant amounts of CO2 and glycerol-laden wastewater. Given the increasing abundance biodiesel wastewater low redox potential glycerol, coupling glycerol oxidation reaction (GOR) with electrolysis has emerged as an attractive strategy to achieve sustainable management, utilization, green chemical synthesis single unit process. Despite need for highly stable catalysts, few studies have examined electrocatalyst deactivation environmental waste streams. Here, we present first-of-a-kind diagnostic study that investigates nickel (Ni) catalyst stability during GOR synthetic wastewaters. A current decline 99.7% was observed within 24 h operation. This coincided 80% decrease surface active Ni(II)/Ni(III) concentrations, 190-fold increases interfacial impedance, appearance electrode C-bonds suggested coverage by reactants intermediates likely main contributor loss catalytic activity. Analyses more complex electrolytes containing methanol oleate emergence distinct mechanisms through restricted NiOOH formation. Altogether, this details several previously unreported mechanisms. These findings can ultimately help inform future design toward practical valorization.

Язык: Английский

---

Anodic Water Oxidation to H₂O₂ on O_v-Rich ZnO Nanoparticles for Degradation of Tetracycline

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 7, 2025

The electrochemical two-electron water oxidation reaction (2e–WOR) provides a state-of-the-art alternative for the generation of hydrogen peroxide (H2O2). However, previously reported catalysts cannot simultaneously achieve both high selectivity and H2O2 yield, which constitutes bottleneck widespread application this technology. In study, cost-effective pyrolysis technique was used to prepare zinc oxide nanoparticles enriched with oxygen vacancy defects, were loaded onto surface three-dimensional conductive carbon cloth an environmentally friendly eco-electrocatalyst. Density functional theory calculations determining Ov content on ZnO(002) indicated continuous increase in level Ov, played crucial role regulating free energy adsorption intermediates associated competitive four-electron pathway. Due enhanced ZnO selectivity, superior fiber conductivity, promoted active site exposure, structure mass transfer, ZnO/CC-450 electrode exhibited preeminent 2e–WOR performances (72.34% at 2.8 V vs RHE), vigorous rate (17.32 μmol cm–2 min–1), robust stability. work comprehensive insight into efficient, promising, approach situ simple preparation, facilitating wide prospect.

Язык: Английский

---

A Transition‐Metal‐Based Bifunctional Electrocatalyst for Coupling Glucose Upgrade with Nitrate Reduction

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

Abstract The integration of glucose oxidation reaction (GOR) and nitrate reduction (NO 3 − RR) in an electrolyzer affords a sustainable approach to produce high value‐added products remove pollutants. Herein, 3D hierarchical architecture consisting defect‐rich copper–cobalt nanosheets immobilized by cobalt phosphide‐modified nickel foam (D‐CuCo/CoP/NF) is rationally designed as bifunctional electrocatalyst for GOR NO RR. resulting self‐standing electrode displayed remarkable activity. Only 1.29 V vs. RHE required yield current density 100 mA cm −2 . Glucose efficiently converted into formate with selectivity value 93.4% Faraday efficiency (FE) 90.3%. as‐prepared D‐CuCo/CoP/NF also capable transforming nitrates valuable ammonia, leading FE 96.9% rate 802.9 µmol h −1 Such performance renders it the best electrocatalysts Mechanistic studies revealed that defects catalyst greatly facilitated adsorption both Cu(OH) 2 Co 3+ ‐O/Co 4+ ‐O species served active sites reaction. A GOR||NO RR hybrid flow cell constructed using electrode, at voltage 1.35 V.

Язык: Английский

---