Electrocatalytic nitrate reduction is an effective strategy to eliminate nitrate's environmental impact and produce high-value-added ammonia products. However, most of the current reports focus on preparation strategies catalysts, with poor exploration mechanism. In this work, we fabricated a binding-free Cu-doped Co3O4 electrode (Cu-Co3O4) reveal structure-activity relationship. Cu-Co3O4 exhibited maximum Faradaic efficiency up 86.5% at -0.6 V vs reversible hydrogen in neutral electrolyte,...

Abstract Electrocatalytic nitrite (NO 2 − ) reduction reaction RR) for ammonia (NH 3 synthesis is a promising alternative NO resource utilization. Herein, dual‐site copper‐cobalt oxide catalyst reported the efficient electrocatalytic of to NH , exhibiting Faradaic efficiency that remained above 95% (0.1 m NaNO over wide potential window (−0.1 −0.6 V vs reversible hydrogen electrode, RHE). More importantly, high maintains an 85% −0.3 RHE) at low concentration (0.01 ). Theoretical calculations...

Abstract Hollow nanoreactors show great potential in catalysis due to the void‐confinement effect. Yet few studies have investigated effect of hollow on intermediates. Herein, electrochemical NO reduction NH 3 (ENOR) is used as a probe reaction study Cu 2 O@CoMn O 4 Combined with results catalytic activity, H ‐treated situ diffusion Fourier transform infrared spectroscopy and finite‐element method simulation confirm that intermediate main reason for enhanced ENOR efficiency. Additionally,...

Electrocatalytic nitrate reduction reaction (NITRR) is a potential candidate for efficient ammonia (NH3) production under ambient conditions in the aqueous media, whereas direct nine-proton and eight-electron transfer result low Faraday efficiency product selectivity. Here, we report that electrochemical NITRR produces NH3 catalyzed by surface oxygen-modified copper nanoparticles wrapped layered graphitized carbon (Cu@C). The characterization results reveal Cu@C-800 possesses an optimal...

The electrocatalytic nitrate (NO3−) reduction reaction (NO3RR) is an attractive strategy for sustainable ammonia (NH3) synthesis, contributing to the artificial nitrogen cycle and renewable energy storage. However, selective conversion of NO3− NH3 remains challenging due complex multi-electron transfer processes, which result in numerous by-products, low yield rate, Faradaic efficiency. Additionally, electrochemical sensitivity catalyst structure complicates identifying active sites. Herein,...

Abstract The metal‐organic framework HKUST‐1 was modified by lithium doping to enhance its CO 2 adsorption property. An optimal capacity achieved as a nitrate solution with moderate concentration used the agent in HKUST‐1. chemical and crystalline structures of were characterized detail. It found that morphologies well preserved after doping. Also, did not deteriorate thermal stability Based on experimental results in‐situ diffuse reflectance infrared Fourier transform spectroscopy, possible...

Dichloromethane (CH2Cl2) hydrodechlorination to methane (CH4) is a promising approach remove the halogenated contaminants and generate clean energy. In this work, rod-like nanostructured CuCo2O4 spinels with rich oxygen vacancies are designed for highly efficient electrochemical reduction dechlorination of dichloromethane. Microscopy characterizations revealed that special nanostructure can efficiently enhance surface area, electronic/ionic transport, expose more active sites. The...

The adsorption mechanism of carbon dioxide (CO₂) on Li/UiO-66 was studied by an <italic>in situ</italic> DRIFTS study.

Abstract In this work, electrocatalytic upgrade of n ‐valeraldehyde to octane with higher activity and selectivity is achieved over Au single‐atom catalysts (SACs)–NiMn 2 O 4 spinel synergetic composites. Experiments combined density functional theory calculation collaboratively demonstrate that single‐atoms occupy surface Ni 2+ vacancies NiMn , which play a dominant role in selective oxidation. A detailed investigation reveals the initial molecule preferentially adsorbs on Mn tetrahedral...

Activating peroxymonosulfate (PMS) by transition metal oxides has been widely applied to degrade organic pollutant. However, the synergistic effect of (TM)-O covalency and anion defects on PMS activation never unveiled. In this work, a multiple spinel nanomicrosphere CoxMn1–xFe2O4 with oxygen vacancies (OVs) was synthesized antibiotics norfloxacin activating PMS. Experimental theoretical analysis showed that tunable Mn–O regulating content Co dopant favorable electron transfer, boosting...

CoMn 2 O 4 /C is constructed for the electrochemical NO reduction reaction toward NH 3 , with a maximum faradaic efficiency of 89.3% at −0.7 V vs. RHE. can promote hydrogenation *NO to *NHO (PDS, 0.13 eV) and inhibit HER.

We have successfully synthesized layered MIL-91(Al) <italic>via</italic> a reflux method and investigated the adsorption behaviors of CO₂ on its surface.

The electrochemical reduction of nitrate (NO3-) to ammonia (NH3) has emerged as an attractive approach for selectively reducing NO3- highly value-added NH3 and removing pollutants simultaneously. In this work, a heterostructured Co/Co3O4 electrocatalyst anchored on N-doped carbon nanotubes was prepared applied the towards under alkaline conditions. catalyst achieves outstanding performance with up 67% faradaic efficiency at -1.2 V vs. Hg/HgO 8.319 mg h-1 mgcat-1 yield -1.7 Hg/HgO. addition,...

We demonstrate a composite photocatalyst for nitric oxide conversion, which consists of the Cu–Fe alloy and Z-scheme graphitic carbon nitride (g-C3N4) ZnIn2S4, excellent photocatalytic performance is 6.45-fold that g-C3N4. Time-resolved photoluminescence confirmed delay effect on charge recombination. Transient absorption spectroscopy indicated heterojunction establishment was mainly due to hole-trapping ability ZnIn2S4. The combined effects were by NO-specific adsorption conversion...

Photocatalytic hydrogen production coupled with selective oxidation of organic substances is significance and remains a grand challenge because unsatisfied photocatalytic activity unclear mechanism. Herein, we first design synthesize atomically dispersed Pd on ZnIn2S4 (PdSA-ZIS) for simultaneously benzylamine. Based systematic characterization combination theoretical simulations, light irradiation-kelvin probe force microscopy (KPFM) time-resolved photoluminescence spectrum etc, demonstrate...