Results 71 to 80 of about 34,844 (261)

Methane Catalytic Combustion on Pd9/?-Al2O3 with Different Degrees of Pd Oxidation

CHIMIA, 2013
: This research is focused on the analysis of adsorbed CH4 intermediates at oxidized Pd9 nanoparticles supported on ? -alumina. From first-principle density functional theory (DFT) calculations, several configurations, charge transfer and ...
Izabela Czekaj, Katarzyna A. Kacprzak, John Mantzaras   +2 more
doaj   +1 more source

A Global Methane Observation System to Reduce Uncertainty for Anthropogenic and Natural Sources and Sinks for Detecting and Attributing Climate Feedbacks

Advanced Science, EarlyView.
Conceptual illustration of a Global Ecosystem Methane Observing System (GEM‐OS) integrating satellites, aircraft, atmospheric networks, and ecosystem measurements to quantify methane emissions from anthropogenic and natural sources. The multi‐scale observing framework improves source attribution, reduces uncertainty in regional methane budgets, and ...
P. Ciais, S. Peng, J. Chang, F. Li, Q. Zhu, K. Yuan, G. Hugelius, H. Li, Y. Cai, F. Chevallier, K. Tibrewal, E. A. Kort, K. Arndt, J. Watts, B. Buma, N. Besic, P. I. Palmer, H. Cadillo‐Quiroz, E. Euskirchen, M. J. Gondwe, A. Hoyt, R. Jackson, S. Malone, D. Monteverde, S. Natali, M. Ramonet, C. Rey‐Sanchez, L. B. Sagang, E. A. G. Schuur, R. Vargas, R. Varner, Z. Zhang, B. Poulter   +32 more
wiley   +1 more source

Numerical Study of Moisture Transfer and Methane Emission in Earthen Final Covers: Effects of Ambient Conditions

Atmosphere
Earthen final covers (EFCs) are widely used to mitigate environmental impacts from landfills, particularly in controlling methane emissions and groundwater contamination.
Tao Wu, Song Feng, Cheng Chen, Guannian Chen, Zhangjing Zhang   +4 more
doaj   +1 more source

Recent Progress in Direct Conversion of Methane to Methanol Over Copper-Exchanged Zeolites

Frontiers in Chemistry, 2019
The conversion of methane into an easily transportable liquid fuel or chemicals has become a highly sought-after goal spurred by the increasing availability of cheap and abundant natural gas.
Min Bum Park, Eun Duck Park, Wha-Seung Ahn   +2 more
doaj   +1 more source

A Glucose Metabolism‐Modulatory Nanobiohybrid Vaccine Platform Promotes Anti‐Tumor Immunity by Orchestrating Autophagy‐Dependent Cross‐Presentation and H2S‐Enhanced NLRP3 Inflammasome Signaling

Advanced Science, EarlyView.
A nanobiohybrid vaccine was designed by constructing a hydrogen‐bonded organic framework coencapsulated with glucose oxidase (GOx) and tumor antigens. This nanobiohybrid vaccine executed a GOx‐catalyzed enzyme reaction that disrupted glucose metabolism and induced redox imbalance in dendritic cells, leading to autophagy‐dependent antigen cross ...
Weidong Wang, Yimin Gong, Jianing Li, Tianze Wu, Mingli Deng, Yannan Yang   +5 more
wiley   +1 more source

Probing Electrocatalyst Design for Product Selectivity in CO2 Reduction

Advanced Science, EarlyView.
Selective CO2 electroreduction is controlled by catalyst structure, dynamic surface reconstruction, adsorbate interactions, and reaction microenvironment. This review summarizes Cu‐ and non‐Cu‐based catalysts, single‐atom and molecular systems, degradation pathways, and operando/computational strategies for steering CO2RR toward hydrocarbons ...
Suvodeep Sen, Bapan Biswas, Apinya Ngoipala, Julia Wiktor, Ujjwal Pal, Shalini Singh   +5 more
wiley   +1 more source

A metagenomic study of methanotrophic microorganisms in Coal Oil Point seep sediments

BMC Microbiology, 2011
Background Methane oxidizing prokaryotes in marine sediments are believed to function as a methane filter reducing the oceanic contribution to the global methane emission.
Haverkamp Thomas HA, Håvelsrud Othilde, Kristensen Tom, Jakobsen Kjetill S, Rike Anne   +4 more
doaj   +1 more source

Ferroelectric Catalysts in the Hydrogen Evolution Reaction: A Perspective

Advanced Science, EarlyView.
This perspective summarizes recent advances in ferroelectric (FE) catalysts for the hydrogen evolution reaction (HER). It first introduces HER fundamentals and FE mechanisms, then classifies FE catalysts into single‐phase, single‐atom‐modified, heterostructured, and other engineered types, with representative examples.
Rongxuan Lu, Weizhen Meng, Zhenxiang Cheng, Judy N. Hart, Michael Ferry, Sean Li, Wenxian Li   +6 more
wiley   +1 more source

Simulation study on catalytic oxidation of low concentration mine gas in an oxidation device

Scientific Reports
Anthropogenic emissions of non-CO2 greenhouse gases, such as low-concentration coal mine methane (cCH4 
Yuhang Liu, Xijian Li, Qi Xiao, Xingfa Jiang, Weilai Dong, Xianyong Chen, Yuyan Feng   +6 more
doaj   +1 more source

Study on the effects of trace metal elements on methane oxidation efficiency of microbial community

Meikuang Anquan
Metal elements in the environment have a certain impact on key transformation processes in microbial metabolic pathways. In order to study the effect of trace metal elements on the metabolism of microorganisms, the methane-oxidizing bacterial communities
Haojuan MA, Ruilin ZHANG, Yinbo ZHOU, Shuang ZHAO, Chaosheng DUAN, Shihai CHU   +5 more
doaj   +1 more source