Investigation of Water Impacts on Surface Properties and Performance of Air-Electrode in Reversible Protonic Ceramic Cells.

Water, being abundant and readily accessible, gains widespread usage as proton source in many catalysis and energy conversion technologies, including applications like reversible protonic ceramic cells (R-PCCs). Revealing the influence of water on the electrode surface and reaction kinetics is critical for further improving their electrochemical performance. Herein, a hydrophilic air-electrode PrBaCsCoO is developed for R-PCC, which demonstrates a remarkable peak power density of 1058 mW cm in fuel cell mode and a current density of 1354 mA cm under 1.

Fe-Doped Ceria-Based Ceramic Cathode for High-Efficiency CO Electrolysis in Solid Oxide Electrolysis Cell.

In the quest for sustainable energy solutions, solid oxide electrolysis cell (SOEC) emerges as a key technology for converting CO into fuels and valuable chemicals. This work focuses on pure ceramic FeSmCeO (xFe-SDC) as the fuel electrodes, and Sr-free ceria-based ceramic electrodes can be successfully constructed for x ≤ 0.05.

A Superior Catalytic Air Electrode with Temperature-Induced Exsolution toward Protonic Ceramic Cells.

Protonic ceramic cells merit extensive exploration, attributed to their innate capabilities for potent and environmentally benign energy conversion. In this work, a temperature-induced exsolution methodology to synthesize SrCoNbO (SCN) nanoparticles (NPs) with notably elevated activity on the surface of PrSrCoNbO (PSCN) is proposed, directly addressing the extant challenge of restrained catalytic activity prevalent in air electrode materials. In situ assessments reveal that SCN NPs commence exsolution from the matrix at temperatures surpassing 900 °C during straightforward calcination processes and maintain stability throughout annealing.

Fe-Doped SDC Solid Solution as an Electrolyte for Low-to-Intermediate-Temperature Solid Oxide Fuel Cells.

Ceria-based oxides, such as samaria-doped ceria (SDC), are potential electrolytes for low-to-intermediate-temperature solid oxide fuel cells (SOFCs). The sinterability of these materials can be improved by adding iron as the sintering aid. This work reveals that Fe is soluble in SDC, forming an Fe-doped SDC solid solution.

Theoretical and Experimental Investigations on K-doped SrCo Nb O as a Promising Cathode for Proton-Conducting Solid Oxide Fuel Cells.

Improving proton conduction in cathodes is regarded as one of the most effective methods to accelerate the sluggish proton-involved oxygen reduction reaction (P-ORR) for proton-conducting solid oxide fuel cells (P-SOFCs). In this work, K dopant was used to improve the proton uptake and migration ability of SrCo Nb O (SCN). K -doped SCN (KSCN) demonstrated great potential to be a promising cathode for P-SOFCs.

Phase 1 trial of ADI-PEG20 plus cisplatin in patients with pretreated metastatic melanoma or other advanced solid malignancies.

Background: Arginine depletion interferes with pyrimidine metabolism and DNA damage-repair pathways, and pairing arginine deiminase pegylated with 20,000-molecular-weight polyethylene glycol (ADI-PEG20) with platinum enhances cytotoxicity in vitro and in vivo in arginine auxotrophs.

Methods: This single-centre, Phase 1 trial was conducted using a 3 + 3 dose escalation designed to assess safety, tolerability and determine the recommended Phase 2 dose (RP2D) of ADI-PEG20.

Results: We enrolled 99 patients with metastatic argininosuccinate synthetase 1 (ASS1) deficient malignancies.

Infiltrated NiCoCeO@NiCo Catalysts for a Finger-Like Anode in Direct Methane-Fueled Solid Oxide Fuel Cells.

Direct utilization of methane in solid oxide fuel cells (SOFCs) is greatly impeded by the grievous carbon deposition and the much depressed catalytic activity. In this work, a promising anode, taking finger-like porous YSZ as the anode substrate and impregnated NiCoCeO@NiCoO as the novel catalyst, is fabricated via the phase conversion-combined tape-casting technique. This anode shows commendable mechanical strength and excellent catalytic activity and stability toward the methane conversion reactions, which is attributed to the exsolved alloy nanoparticles and the active oxygen species on the reduced NiCoCeO catalyst as well as the facilitated methane transport rooting in the special open-pore microstructure of the anode substrate.

A Durable Ruddlesden-Popper Cathode for Protonic Ceramic Fuel Cells.

Protonic ceramic fuel cells (PCFCs) have been proved as an efficient energy converter at intermediate temperatures. To accelerate the kinetics of the proton-involved oxygen reduction reaction (p-ORR), developing efficient and durable cathodes is of great importance for improving PCFCs. In this work, a new triple-layered Ruddlesden-Popper (R-P) structure oxide, Sr EuFe Co O (3-SEFC ), was developed as a potential single-phase cathode for PCFCs, showing high oxygen non-stoichiometry and desirable structural thermal stability.

Vanadium-Doped Strontium Molybdate with Exsolved Ni Nanoparticles as Anode Material for Solid Oxide Fuel Cells.

Vanadium-doped strontium molybdate (SVM) has been investigated as a potential anode material for solid oxide fuel cells due to its high electronic conductivity of about 1000 S cm at 800 °C in reducing atmospheres. In this work, NiO is introduced to SVM with the B-site excess design to induce in situ growth of Ni nanoparticles in the anodic operational conditions. The Ni particles are exsolved from the parent oxide phase as clearly demonstrated with various techniques including X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy.

A Stable and Efficient Cathode for Fluorine-Containing Proton-Conducting Solid Oxide Fuel Cells.

Substitution of anions such as F and Cl can effectively improve the stability of proton-conducting electrolytes at no expense to proton conduction. However, during operation, F and Cl in electrolytes can transfer to the cathodes, which reduces the stability of the electrolytes. In this work, F -doped Ba Sr Co Fe O [Ba Sr Co Fe O F (F-BSCF)] was prepared as a potential cathode for proton-conducting solid oxide fuel cells with BaCe Sm F O electrolyte.

A first-principles study on divergent reactions of using a SrFeO cathode in both oxygen ion conducting and proton conducting solid oxide fuel cells.

Exploring mechanisms for sluggish cathode reactions is of great importance for solid oxide fuel cells (SOFCs), which will benefit the development of suitable cathode materials and then accelerate cathode reaction rates. Moreover, possible reaction mechanisms for one cathode should be different when operating in oxygen ion conducting SOFCs (O-SOFC) and in proton conducting SOFCs (P-SOFCs), and therefore, they lead to different reaction rates. In this work, a Ruddlesden-Popper (R-P) oxide, SrFeO (SFO), was selected as a promising cathode for both O-SOFCs and P-SOFCs.

New, Efficient, and Reliable Air Electrode Material for Proton-Conducting Reversible Solid Oxide Cells.

Driven by the demand to minimize fluctuation in common renewable energies, reversible solid oxide cells (RSOCs) have drawn increasing attention for they can operate either as fuel cells to produce electricity or as electrolysis cells to store electricity. Unfortunately, development of proton-conducting RSOCs (P-RSOCs) faces a major challenge of poor reliability because of the high content of steam involved in air electrode reactions, which could seriously decay the lifetime of air electrode materials. In this work, a very stable and efficient air electrode, SrEuFeCoO (SEFC) with layer structure, is designed and deployed in P-RSOCs.

Magnetic resonance image of sellar region in pituitary stalk interruption syndrome in children and adolescents.

Objective: To investigate the magnetic resonance imaging (MRI) manifestations of sellar region of children and adolescents with pituitary stalk interruption syndrome (PSIS).

Methods: Thirty-one PSIS cases were selected from February 2001 to August 2010 in Peking Union Medical College Hospital. MRI images were collected to calculate the volume and coronary area of the pituitary based on its measured height, width, and anteroposterior diameter.