Efficient conversion of methane to value-added products such as olefins and aromatics has been in pursuit for the past few decades. The demand increased further due recent discoveries shale gas reserves. Oxidative non-oxidative coupling (OCM NOCM) have actively researched, although catalysts with commercially viable rates are not yet available. Recently, [Formula: see text] (SFMO-075Fe) reported activate an electrochemical OCM (EC-OCM) set up a C2 selectivity 82.2%

The focus of the present article is on ionic size variation effects properties charged interfaces involving electrolyte solution, commonly referred to as electric double layers. presence a well defined interface between solution and substrate has profound impact local structure liquid phase. All species are distributed according various fluid surface interactions. excluded volume finite dimensions all ions solvent molecules major contributor detailed structure. determines important layers...

Abstract Methane conversion into value‐added products such as olefins and aromatics is gaining increased attention in the wake of new natural gas reserve discoveries. Electrochemical oxidative coupling methane (E‐OCM) provides better product selectivity distribution can be controlled by applied potential well oxide ion flux. Here a catalyst based on Mg Fe codoped barium niobate perovskites reported. The prepared show excellent chemical stability CH 4 ‐rich environments up to 925 °C while...

The electrochemical oxidative coupling of methane (E-OCM) to higher hydrocarbons, requires anodes that are stable under reducing conditions. We have previously demonstrated high activity with long term stability/durability for the perovskite anode BaMg 0.33 Nb 0.67-x Fe x O 3-δ (BMNF) while performing E-OCM 1 . Our group has also improved total conductivity and barium niobate perovskites via exchange Mg Ca (from 18 mS/cm -1 41 ), decreasing Goldschmidt tolerance factor below increased cubic...

Electrochemical oxidative coupling of methane (E-OCM) to produce ethylene is gaining renewed interest due the ability control conversion rate and product selectivity though temperature applied potential. We previously demonstrate Mg, Fe Ca, codoped barium niobates have remarkable activation properties coupled with good chemical stability. Nevertheless, their electrical conductivity remained less than 50 mScm-1 that low for electrode application. Hence, we attempted both A B site doping on...

Doped perovskite metal oxide catalysts of the form A(B x M 1-x )O 3-δ have been instrumental in development solid electrolyzers/fuel cells. In addition, this material class has also demonstrated to be effective as a heterogeneous catalyst. Co-doped barium niobate perovskites shown remarkable stability highly acidic CO 2 sensing measurements/environments (1). However, reason for their chemical is not well understood. Doping with transition cations B site often leads exsolution under reducing...

Perovskite metal oxides of the form A(BxM1–x)O3−δ are interest to electrocatalysis and heterogeneous communities due their tunable electrical catalytic properties. However, they suffer poor chemical stability under highly reducing coke-forming conditions. Doped barium niobates show remarkable during electrochemical oxidative coupling methane (E-OCM) measurements. The reason for is not well understood. We investigated high-temperature reductive BaMg0.33Nb0.67–xFexO3−δ (BMNF), using a variety...

More efficient usage of shale gas reserves and natural resources will allow for higher olefin yields lower greenhouse emissions. The oxidative coupling methane (OCM) is a direct pathway converting to ethylene at temperatures >700 °C. OCM catalysts preferably avoid CO x products limit coke formation on the catalyst. Often, are analyzed via computationally expensive DFT computations in combination with experimental results leading long lead times catalyst development. Perovskite oxide...

Perovskite anodes (general chemical formula ABO 3 ) for the high temperature (>750 °C) electrolysis of methane to ethylene in a ceramic solid oxide cell require both activity, and mechanical stability as well durability future commercialization efforts. We have previously shown co-doped barium niobate perovskites stable anode materials electrochemical oxidation (E-OCM) 1 . The mechanism excellent is highly connected flexible state switching Nb 4+ /Nb 5+ cations associated with changes...

Perovskite materials are used for high temperature electrochemical applications such as solid oxide fuel cells (SOFC) and electrolyzers due to their tunable conductivity catalytic activity. However, operation poses significant challenges in both fabrication durable that is further complicated by the operating environment. We studied barium niobates with various A B site dopants. These doped showed enhanced thermochemical stability SOFC relevant conditions activity towards methane activation....

Doped perovskite metal oxide catalysts of the form AB x C 1-x O 3-δ are interest to catalysis community due ability fine tune catalytic activity or chemical stability through doping. barium niobate perovskites have shown remarkable in CO 2 sensing and methane conversion measurements. However, reason for is not well understood. Doping with transition cations B site can lead exsolution under reducing conditions. Many used oxidative coupling (OCM) electrochemical (E-OCM) either lack long term...

Perovskite materials are being studied for high temperature electrochemical applications such as solid oxide fuel cells (SOFC) and electrolyzers due to their tunable conductivity catalytic activity. However, operation poses significant challenges in both fabrication durable that is further complicated by the operating environment. 1 We barium niobates with various dopants Fe, Ni, Ca, Y, Mg B site doping while Sr, K, La A doping. These showed enhanced chemical stability SOFC relevant...

Efficient conversion of methane to value added products such as olefins and aromatics has been in pursuit for the past several decades. The demand increased further due recent discoveries shale gas reserves. Electrochemical is gaining attention its ability control oxide ion flux that will help reduce over-oxidation while also activate via applied potential. High temperature electrolysis benefits this process improved kinetics. Unfortunately, high operation leads materials degradation...

Pursuing efficient conversion of methane to value-added products such as olefins and aromatics is a prospective use natural feedstocks. The demand for on-site has further increased due the recent discoveries shale gas reserves. Electrochemical provides means control surface oxide ion concentration, aiming eliminate over-oxidation while also aiding in activation via applied potential. High temperature electrolysis processes provide improved reaction kinetics. Unfortunately, high operation...

Perovskite materials have helped make notable advances in many applications over the last few decades. Specifically, high temperature electrochemical technologies such as solid oxide fuel cells (SOFC) and electrolyzers where perovskite-based electrolyte electrode are playing pivotal roles. However, operation poses significant challenges both fabrication durable that is further complicated by operating environment. For example, an a SOFC faces highly oxidizing environment on cathode while...

Identification of large shale gas reserves has reduced the price methane significantly. Interest in converting to value-added commodity chemicals increased as a result these findings [1]. Direct conversion ethylene using heterogeneous methods such oxidative and non-oxidative coupling (OCM NOCM) utilize metal oxide catalysts with varying success. However, catalyst commercial viability remains elusive. Recently, iron-doped Sr2Fe1.5+0.075Mo0.5O6-δ electrodes (SFMO-075) have been shown convert...

Efficient conversion of methane to value added products such as olefins and aromatics has been in pursuit for the past several decades. The demand increased further due recent discoveries shale gas reserves (1). Oxidative non-oxidative coupling (OCM NOCM) actively researched although commercially viable rates have not achieved with any catalyst yet. Electrochemical OCM is gaining attention its ability control oxide ion flux that will help reduce over-oxidation while also helping activate...

Methane is the major component of many gas sources such as natural and shale more than 500 million tons methane produced every year. Unfortunately, most it burnt an energy source due to difficulties in converting into easily transportable fuels. Oxidative non-oxidative coupling (OCM NOCM) has been actively researched produce ethylene higher olefins from although catalysts with commercially viable conversion rates have not developed yet.[1] Electrochemical OCM (EC-OCM) gaining attention its...