Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Michael K.H. Leung is active.

Publication


Featured researches published by Michael K.H. Leung.


Environmental Science & Technology | 2010

An efficient bismuth tungstate visible-light-driven photocatalyst for breaking down nitric oxide

Guisheng Li; Dieqing Zhang; Jimmy C. Yu; Michael K.H. Leung

This paper reports a photocatalytic removal of 400 ppb level of NO in air under visible light irradiation by utilizing three-dimensional (3D) hierarchical bismuth tungstate (Bi(2)WO(6)) microspheres. A facile microwave-assisted hydrothermal method involving bismuth nitrate and sodium wolframate was developed to synthesize the photocatalyst. The Bi(2)WO(6) samples were characterized by using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), Raman and ultraviolet-visible reflectance (UV-vis) spectroscopy. The relationship between the physicochemical property and the photocatalytic performance of the as prepared samples is discussed. The present work demonstrates that the 3D hierarchical Bi(2)WO(6) microspheres are effective visible-light-driven photocatalytic functional materials for air purification.


Energy and Environmental Science | 2017

Engineering stepped edge surface structures of MoS2 sheet stacks to accelerate the hydrogen evolution reaction

Jue Hu; Bolong Huang; Chengxu Zhang; Zilong Wang; Yiming An; Dan Zhou; He Lin; Michael K.H. Leung; Shihe Yang

Two-dimensional molybdenum sulfide is an attractive noble-metal-free electrocatalyst for the hydrogen evolution reaction (HER). Significant efforts have been made to increase the number of exposed edge sites. However, little attention has been paid to devising edge surface structures of MoS2 sheet stacks to promote the HER kinetics. Herein we report the first demonstration of significantly enhanced HER kinetics by controllably fabricating a stepped MoS2 surface structure. Vertical arrays of MoS2 sheets terminated with such a stepped surface structure have proved to be an outstanding HER electrocatalyst with an overpotential of 104 mV at 10 mA cm−2, an exchange current density of 0.2 mA cm−2 and high stability. Experimental and theoretical results indicate that the enhanced electrocatalytic activity of the vertical MoS2 arrays is associated with the unique vertically terminated, highly exposed, stepped surface structure with a nearly thermoneutral H-adsorption energy. This work opens a new avenue to designing and developing layered materials for electrochemical energy applications.


Energy & Environment | 2018

Barriers to adopting solar photovoltaic systems in Hong Kong

Kevin Lo; Daphne Ngar-yin Mah; Guihua Wang; Michael K.H. Leung; Alex Y. Lo; Peter Hills

The adoption of solar photovoltaic systems is often constrained by various sociotechnical barriers. In this paper, we identify and differentiate barriers to photovoltaic among three groups of potential adopters in Hong Kong: individuals, businesses, and the public sector. A total of 55 interviews were conducted to collect the data for the study. The results indicate that the most important constraints were technical barriers such as space limitations and low energy output, followed by economic barriers such as high upfront costs and long payback periods. Furthermore, we found that individuals were the group most exposed to market, policy, and regulatory barriers and they had to contend with the highest number of barriers. Our analysis also illustrates that there was a close interrelationship between the barriers. For example, technical barriers, such as space limitations, could be overcome partially by addressing regulatory barriers. Based on the analysis, we formulate a number of policy recommendations. The results of this study could be useful to the government in its attempt to facilitate a sustainable energy transition in Hong Kong.


Joule | 2017

Nanohybridization of MoS2 with Layered Double Hydroxides Efficiently Synergizes the Hydrogen Evolution in Alkaline Media

Jue Hu; Chengxu Zhang; Lin Jiang; He Lin; Yiming An; Dan Zhou; Michael K.H. Leung; Shihe Yang


Applied Catalysis B-environmental | 2017

Controlling charge transfer in quantum-size titania for photocatalytic applications

Songling Wang; Shuhai Lin; Dieqing Zhang; Guisheng Li; Michael K.H. Leung


Materials Today Energy | 2016

Synthesis of SnSb-embedded carbon-silica fibers via electrospinning: Effect of TEOS on structural evolutions and electrochemical properties

Hongkang Wang; Qizhen Wu; Daxian Cao; Xuan Lu; Jinkai Wang; Michael K.H. Leung; Shaodong Cheng; Lu Lu; Chunming Niu


Applied Energy | 2016

Vanadium microfluidic fuel cell with novel multi-layer flow-through porous electrodes: Model, simulations and experiments

Li Li; Georgios Nikiforidis; Michael K.H. Leung; Walid A. Daoud


Electrochimica Acta | 2016

Plasma-grafted anion-exchange membrane preparation and process analysis

Chengxu Zhang; Jue Hu; Wenguang Fan; Michael K.H. Leung; Yuedong Meng


Energy Procedia | 2017

Thermodynamic and Thermo-economic Analysis of Integrated Organic Rankine Cycle for Waste Heat Recovery from Vapor Compression Refrigeration Cycle

Muhammad Asim; Michael K.H. Leung; Zhiqiang Shan; Yingying Li; Dennis Y.C. Leung; Meng Ni


Journal of Catalysis | 2018

Janus effect of O2 plasma modification on the electrocatalytic hydrogen evolution reaction of MoS2

Chengxu Zhang; Lin Jiang; Yingjie Zhang; Jue Hu; Michael K.H. Leung

Collaboration


Dive into the Michael K.H. Leung's collaboration.

Top Co-Authors

Avatar

Chengxu Zhang

City University of Hong Kong

View shared research outputs
Top Co-Authors

Avatar

Yiyi She

City University of Hong Kong

View shared research outputs
Top Co-Authors

Avatar

Li Li

City University of Hong Kong

View shared research outputs
Top Co-Authors

Avatar

Meng Ni

Hong Kong Polytechnic University

View shared research outputs
Top Co-Authors

Avatar

Wenguang Fan

City University of Hong Kong

View shared research outputs
Top Co-Authors

Avatar

Jue Hu

Hong Kong University of Science and Technology

View shared research outputs
Top Co-Authors

Avatar

Lin Jiang

Kunming University of Science and Technology

View shared research outputs
Top Co-Authors

Avatar

Zhouguang Lu

South University of Science and Technology of China

View shared research outputs
Top Co-Authors

Avatar

Alex Y. Lo

University of Hong Kong

View shared research outputs
Top Co-Authors

Avatar

Dan Zhou

Hong Kong University of Science and Technology

View shared research outputs
Researchain Logo
Decentralizing Knowledge