Ocean University of China

About: Ocean University of China is a education organization based out in Qingdao, China. It is known for research contribution in the topics: Population & Sea surface temperature. The organization has 27604 authors who have published 27886 publications receiving 440181 citations. The organization is also known as: Zhōngguó Hǎiyáng Dàxué & OUC.

An electrodeposited cobalt–selenide-based film as an efficient bifunctional electrocatalyst for full water splitting

Abstract: Design and development of noble metal-free, active and bifunctional electrocatalysts is crucial for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in the full water splitting process. Herein, an amorphous cobalt–cobalt oxide/cobalt selenide composite film (CoOx–CoSe) has been fabricated directly on a three-dimensional macro-porous Ni foam (NF) substrate by a facile electrodeposition method, which shows remarkable activity and good long-term stability as an efficient bifunctional electrocatalyst for the OER and HER under alkaline conditions. In 1.0 M KOH, this catalyst as a robust 3D O2-evolving anode can achieve 100 mA cm−2 and 500 mA cm−2 only at overpotentials of 300 mV and 380 mV, respectively. When used as a HER catalyst, similarly, this electrode shows excellent catalytic performance, which needs an overpotential of 90 mV to deliver 10 mA cm−2. This bifunctional electrode can allow an alkaline electrolyzer to obtain a water-splitting current density of 20 mA cm−2 at a cell voltage of around 1.66 V, which offers potential applications in the field of water splitting.

Principal Instructional Leadership, Teacher Self-Efficacy, and Teacher Professional Learning in China: Testing a Mediated-Effects Model:

Abstract: Background: Empirical evidence increasingly suggests that leadership which motivates, supports, and sustains the professional learning of teachers has a knock-on effect for both student learning an...

Intraseasonal variability of sea surface height in the Bay of Bengal

Abstract: Intraseasonal variability (ISV) of sea surface height (SSH) over the Bay of Bengal (BoB) is studied using altimetry data and an eddy-resolving ocean model. In both the model hindcast and satellite observations, large SSH ISV is found along the eastern and northern coasts of the BoB, in the western BoB, and in a zonal band across the Bay centered near 5 degrees N. The ISV displays a clear seasonality. In the western BoB, it reaches its annual maximum in spring, whereas it does so in summer and autumn southeast of Sri Lanka. Driven by equatorial intraseasonal winds, equatorial Kelvin waves propagate eastward, reach the western coast of Sumatra, and reflect there to propagate around the perimeter of the BoB as coastally trapped waves. Two distinct bands of high eddy activity are detected in the western and central BoB, respectively. In both bands, isolated eddies propagate southwestward. Eddy formation in the eddy train in the central Bay is linked to the coastal wave as it bends around the corner of the Irrawaddy Delta off Myanmar. Eddy activity contributes to the high ISV in the central Bay to some extent. An energetics analysis indicates that high total eddy energy in the western BoB is due to barotropic/baroclinic instability of the mean current. Citation: Cheng, X., S.-P. Xie, J. P. McCreary, Y. Qi, and Y. Du (2013), Intraseasonal variability of sea surface height in the Bay of Bengal, J. Geophys. Res. Oceans, 118, 816-830, doi:10.1002/jgrc.20075.