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Poor durability of bifunctional oxygen electrocatalysts is one main bottleneck that suppresses the widespread application of rechargeable metal-air batteries. Herein, a "ship in a bottle" design is achieved by impregnating fine transition metal dichalcogenide nanoparticles into defective carbon pores which act as interconnected nanoreactors. The erected 3D porous conductive architecture provides a "highway" for expediting charge/mass transfer. This design not only delivers a high surface-to-volume ratio to increase numbers of exposed catalytic sites, but also precludes nanoparticles from aggregation during cycling owing to the pore spatial confinement effect. Therefore, the long-term plague inherent to nanocatalyst stability can be solved. Moreover, the synergistic coupling effects between defect-rich interfaces and chemical bonding derived from heteroatom-doping boost the catalytic activity and prohibit the detachment of nanoparticles for better stability. Consequently, the developed catalyst presents superior bifunctional oxygen electrocatalytic activities and durability, outperforming the best-known noble-metal benchmarks. In a practical application to rechargeable Zn-air batteries, long-term cyclability for over 340 h is realized at a high current density of 25 mA cm-2 in ambient air while retaining an intact structure. Such a universal "ship in a bottle" design offers an appealing and instructive model of nanomaterial engineering for implementation in various fields.
This article was published in the following journal.
Name: ACS nano
Design of cost-effective bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is vital for developing hydrogen energy for the future. Herein...
The highly oxidative operating conditions of rechargeable zinc-air batteries causes significant carbon-support corrosion of bifunctional oxygen electrocatalysts. Here, a new strategy for the catalyst ...
The establishment of electrocatalysts with bifunctionality for efficient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in acidic environments is necessary for the development o...
The electrocatalytical process is the most efficient way to produce ammonia (NH3) under ambient conditions, but developing a highly efficient and low-cost metal-free electrocatalysts remains a major s...
Developing cost-effective, efficient bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is the heart of metal-air batteries as a renewable-energy...
The purpose of the study is to test a research prescription bottle that will monitor the physical environment inside the bottle.
It is increasingly recognised that rapid growth in infancy may be associated with a greater risk of cardiovascular disease later in life. This trial will investigate whether the use of inf...
The objective of the proposed research is to conduct an intervention study that will assess the effect of feeding mode (clear versus opaque bottle) on the quality and outcome of infant fee...
The use of vacuum bottle in drainage of pneumothorax was seldom reported. This study aims to investigate the safety of vacuum bottle plus non-tunneled catheter for drainage of iatrogenic p...
The aim of this study is evaluates the effect of the use of bottle and cup in breast sucking patterns in preterm infants. It will be a randomized blind study. One group will be randomized ...
The species Tursiops truncatus, in the family Delphinidae, characterized by a bottle-shaped beak and slightly hooked broad dorsal fin.
An approach, process, or methodology which emphasizes credible evidence and the best available scientific knowledge, judiciously integrated to achieve the best possible outcomes in structural design. For example, the design of a new OUTPATIENT CLINIC might incorporate a review of published research on outpatient clinic design, decisions on similar past projects, along with interviews with staff and consumers.
An island in Polynesia, in the south Pacific Ocean. It was discovered in 1767 by Philip Carteret, uninhabited until 1790 when settled by mutineers from the English ship, Bounty. The settlement was discovered in 1808; the population was removed temporarily to Tahiti in 1831 and to Norfolk Island (between New Caledonia and New Zealand) in 1856. Some later returned to Pitcairn and their descendents constitute the present population of this British colony. The island is named for the midshipman who first sighted it from the ship. (From Webster's New Geographical Dictionary, 1988, p958 & Room, Brewer's Dictionary of Names, 1992, p422)
A highly-sensitive (in the picomolar range, which is 10,000-fold more sensitive than conventional electrophoresis) and efficient technique that allows separation of PROTEINS; NUCLEIC ACIDS; and CARBOHYDRATES. (Segen, Dictionary of Modern Medicine, 1992)
Architecture, exterior and interior design, and construction of facilities other than hospitals, e.g., dental schools, medical schools, ambulatory care clinics, and specified units of health care facilities. The concept also includes architecture, design, and construction of specialized contained, controlled, or closed research environments including those of space labs and stations.
Antiretroviral Therapy Clostridium Difficile Ebola HIV & AIDS Infectious Diseases Influenza Malaria Measles Sepsis Swine Flu Tropical Medicine Tuberculosis Infectious diseases are caused by pathogenic...