Gadolinium-Mediated Oxygen Affinity Induced Efficient Covalorization of CH and NO in an Ir-GdO Single-Atom Catalyst.

Valorization of nitrous oxide (NO) and methane (CH) for chemicals has garnered growing interest for mitigating their climate impact. Dry reforming of methane (DRM) with industrial NO exhaust offers a promising route. However, the DRM reaction often requires rigorous temperatures (>650 °C) accompanied by overoxidation, hindering CO and H formation due to weak oxygen binding on catalysts.

Eu-doped nickel oxide for low-temperature direct decomposition of nitrous oxide.

Nitrous oxide (NO) is a potent greenhouse gas with high global warming potential. It is urgent to develop active and stabile catalysts for NO direct catalytic decomposition (deNO) in industrial exhaust gas. In this study, a series of Eu-doped NiO catalysts were synthesized by co-precipitation method.

Structural Dynamic Evolution of Pt Nanoclusters in Ultra-Low-Temperature Methane Combustion with Nitrous Oxide.

Tailoring and stabilizing the active sites of supported noble-metal catalysts to a semioxidized state with unsaturated coordination remain a long-standing challenge in heterogeneous catalysis. Herein, we develop a reaction-atmosphere-driven evolution approach for dynamic structural tuning of semioxidized metal sites in supported Pt catalysts. NO as an alternative oxidant is used over Pt/TiO in CH combustion to dynamically prompt the transformation of Pt nanoclusters into Pt (0 < δ < 2) nanoclusters.

Particulate methane monooxygenase and cytochrome P450-induced reactive oxygen species facilitate 17β-estradiol biodegradation in a methane-fed biofilm.

Methane-fed biosystems have shown great potential for degrading various organic micropollutants, yet underlying molecular degradation mechanisms remain largely unexplored. In this study, we uncover the critical role of biogenic reactive oxygen species (ROS) in driving the degradation of 17β-estradiol (E) within a methane-fed biofilm reactor. Metagenomic analyses confirm that aerobic methanotrophs, specifically Methylococcus and Methylomonas, are responsible for the efficient degradation of E, achieving a degradation rate of 367.

Bilayer electrified-membrane with pair-atom tin catalysts for near-complete conversion of low concentration nitrate to dinitrogen.

Discharge of wastewater containing nitrate (NO) disrupts aquatic ecosystems even at low concentrations. However, selective and rapid reduction of NO at low concentration to dinitrogen (N) is technically challenging. Here, we present an electrified membrane (EM) loaded with Sn pair-atom catalysts for highly efficient NO reduction to N in a single-pass electrofiltration.

Insights into the Roles of Different Iron Species on Zeolites for NO Selective Catalytic Reduction by CO.

Iron zeolites are promising candidates for mitigating nitrous oxide (NO), a potent greenhouse gas and contributor to stratospheric ozone destruction. However, the atomic-level mechanisms by which different iron species, including isolated sites, clusters, and particles, participate in NO decomposition in the presence of CO still remain poorly understood, which hinders the application of the reaction in practical technology. Herein, through experiments and density functional theory (DFT) calculations, we identified that isolated iron sites were active for NO activation to generate adsorbed O* species, which readily reacted with CO following the Eley-Rideal (E-R) mechanism.

High-Efficiency Electrocatalytic Reduction of NO with Single-Atom Cu Supported on Nitrogen-Doped Carbon.

Nitrous oxide (NO) is a potent greenhouse gas with a high global warming potential, emphasizing the critical need to develop efficient elimination methods. Electrocatalytic NO reduction reaction (NORR) stands out as a promising approach, offering room temperature conversion of NO to N without the production of NO byproducts. In this study, we present the synthesis of a copper-based single-atom catalyst featuring atomic Cu on nitrogen-doped carbon black (Cu-NCB).