Topic
Oxygen
About: Oxygen is a research topic. Over the lifetime, 48149 publications have been published within this topic receiving 1113788 citations. The topic is also known as: O & Oxygen.
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180 citations
TL;DR: In this paper, the outer-sphere reduction of oxygen to water according to O2(g) + 4H+(aq)+ 4e- → 2H2O(l) (1) and its reverse reaction are analyzed using self-consistent ab initio MP2/6-31G** calculations over th...
Abstract: The outer-sphere reduction of oxygen to water according to O2(g) + 4H+(aq) + 4e- → 2H2O(l) (1) and its reverse reaction are analyzed using self-consistent ab initio MP2/6-31G** calculations over th...
180 citations
TL;DR: In this paper, different Ni-based oxygen carriers were prepared by dry impregnation using γ-Al2O3 as support, and the reactivity, selectivity during methane combustion, attrition rate and agglomeration behavior of the oxygen carriers are measured and analyzed in a thermogravimetric analyzer and in a batch fluidized bed during multi-cycle reduction-oxidation tests.
179 citations
TL;DR: In this paper, the effect and mechanism of oxygen vacancy occupancy on enhancing piezocatalytic activity of BaTiO3 nanobelt was investigated and showed that the presence of oxygen vacancies could efficiently adsorb and activate O2 on the surface of the nano-branch and consequently enhance the performance.
Abstract: BaTiO3 nanobelt featuring controlled oxygen vacancies, namely BTO-OV-X (X represents time (h) of vacuum heat-treatment), were prepared to systematically investigate the effect of oxygen vacancies occupancy on pizeocatalytic performance for degradation of organic pollutant. Remarkably, the creation of oxygen vacancies on BaTiO3 can mediate the piezocatalytic activity. The piezocatalytic activity exhibited a volcano-type trend with increasing oxygen vacancies. Results from first-principles density functional theoretical (DFT) calculations and O2-temperature programmed desorption (O2-TPD) measurement indicated that the presence of oxygen vacancies could efficiently adsorb and activate O2 on the surface of BaTiO3 nanobelt and consequently enhance piezocatalytic activity. Importantly, with the aid of piezoresponse force microscopy (PFM) measurement, the intrinsic reason of volcano-type trend of oxygen vacancy-activity was well unveiled. This work reveals the effect and mechanism of oxygen vacancy occupancy on enhancing piezocatalytic activity of BaTiO3 nanobelt and will shed light on design of efficient piezocatalysts in the future.
179 citations