A relatively inexpensive commercially available RO membrane was shown to be useful for direct seawater H₂ generation as the can selectively transport protons and hydroxide ions over other salt ions, keep inert anolyte contained avoid chlorine gas evolution.

Saline water represents an inexhaustible source of for hydrogen production from electrolysis.

Thermally regenerative ammonia batteries (TRABs) are electrochemical energy conversion devices that convert low-grade waste heat into electrical power. To date, reported TRABs have suffered from poor performance due to their reliance on dissolution and deposition redox reactions with transition metals. Here we present a new TRAB chemistry uses ligands stabilize aqueous Cu(I) Cu(II) ions, thereby creating the first all-aqueous TRAB. Rotating disc electrode studies were conducted evaluate...

Prussian blue analogues are used in electrochemical deionization due to their cation sorption capabilities and ion selectivity properties. Elucidating the fundamental mechanisms underlying intercalation/deintercalation is important for development of ion-selective electrodes. We examined thermodynamic kinetic properties nickel hexacyanoferrate electrodes by studying different temperatures effects on with monovalent ions (Li+, Na+, K+, NH4+) relevant battery electrode applications. Higher...

Abstract Despite the commercialization of flow batteries, little is known about how much electrode treatment methods affect individual overpotential contributions. Thermal oxidation one most common in literature, which has increased energy efficiencies vanadium redox batteries (VRFBs) by 10 to 20 % depending on their operating current density. However, it unclear remains after these treatments, critical identifying viable pathways for further improvement. Herein, we demonstrate...

Abstract The bacteria Geobacter sulfurreducens (GS) is a promising candidate for broad applications involving bioelectrochemical systems (BES), such as environmental bioremediation and energy production. To date, most GS studies have reported biofilm-scale metrics, which fail to capture the interactions between cells their local environments via complex metabolism at cellular level. Moreover, dominance of considering diffusion-only molecular mass transport models within biofilm has ignored...

Thermally regenerative ammonia batteries (TRABs) are an emerging technology that use low temperature heat (T < 150 °C) to recharge a flow battery produces electrical power on demand. The all-aqueous copper TRAB can provide high densities and thermal energy efficiencies relative other devices harvest from waste heat, but its performance is adversely impacted by the crossover of undesired species through membrane lower cell voltages compared conventional batteries. In this work, we...

The need for viable energy storage technologies is becoming more apparent as the amount of renewable being wasted increases. Here, we have provided an in-depth quantification theoretical density possible from redox flow battery chemistries which essential to understanding capacity a system. This improved model captures wide range conditions and reaction types based on fundamental electrolyte chemistry principles thermodynamics. proposed here Requires standard Gibbs energy, activity...

Redox flow batteries are a hot topic for both scientists and engineers. The use of carbon electrodes is ubiquitous, their surface modification one the key issues that stands in way commercialization breakthroughs. In this critical analysis representative literature, we offer readers necessary interdisciplinary view challenges opportunities researchers fields chemistry, batteries, fuel cells electrocatalysis on solid surfaces. Though focused electrode materials vanadium redox battery, provide...

Corrosion studies were conducted for martensitic carbon steels in 5 wt% NaCl brine solutions at 4°C and 10 MPa (1,450 psi). These simulated different subsurface environments relevant to Arctic drilling. Here, two high-strength steels, S-135 UD-165, studied three environments: (1) a CO2-NaCl-H2O solution with CO2:H2O molar ratio of 0.312 the whole system, (2) an H2S-NaCl-H2O H2S:H2O 3.12 × 10−4, (3) CO2-H2S-NaCl-H2O same acid gas water ratios as 1 2. Results from CO2+H2S mixed environment...

An electrochemical kinetics investigation of the CuCl(aq)/HCl(aq) electrolyzer identified methods to significantly reduce platinum loadings required achieve a high cell current density 0.5 A/cm2 at 0.7 V. As is key component Cu-Cl thermochemical cycle, economic viability cycle was improved by reducing loading A/cm2. Electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV) with rotating disc electrode were employed investigate aqueous CuII/CuI chloride complexes...