AIBN Special Seminar: Prof Junhu Wang, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian China

Title:                             Novel catalytic Materials for environment and energy.

Date:                             Friday 2 November

Time:                            2:00pm

Venue:                         AIBN, Level 1 Seminar Room

 

 

Abstract

Recent years, our research focus on the development & characterization of the novel nano-composite materials applied for environmental purification and energy catalysis. Our main research topics:

 

1) In situ Mössbauer investigation combined with other spectroscopic studies (such as XAFS and so on) on the structural properties and mechanism of iron and/or tin containing catalytic materials;

2) Nano catalytic materials of noble metal with special morphology;

3) Hydroxyapatite-based catalytic materials with high efficiency.

 

This talk is to present a highly active and sintering-resistant Au/FeOx-hydroxyapatite catalyst for CO oxidation.

 

Despite of the high activity and extensive potential applications of supported gold catalyst, one problem is the sintering of nano-gold at high temperatures (e.g. ≥ 400 oC), which will constrain its practical applications. Several strategies such as utilizing mesoporous materials to confine gold particles, using mixed or surface-modified oxide supports, developing new supports like metal phosphates have been adopted to address this problem. These strategies certainly improve the anti-sintering ability at high temperatures. However, they usually arouse other problems such as use of expensive precursor, decrease of activity and/or even deactivation on stream. Therefore, it is still a challenge issue and remains large space to explore new material and/or new method for gold catalyst preparation to address this problem.

 

Recently, hydroxyapatite [HAP, Ca10(PO4)6(OH)2] based functional materials have attracted more and more attentions as recyclable catalysts and/or catalyst carriers due to its structural designability, bifunctionality, adsorption and ion-exchange ability. HAP contains abundance of PO43- and OH- group, both of which were found to enhance the stability of gold nano-particles/clusters against sintering at elevated temperatures. Therefore, to utilize the advantage of HAP based materials to enhance the stability of gold nanoparticles appears much attractive. Herein, we developed a FeOx modified HAP supported Au catalyst (Au/FeOx-HAP), which possesses high activity and durability for CO oxidation and strong stability against sintering at elevated temperatures.

 

Biography

Education

● B. S. in Radiochemistry, Lanzhou University, China, 1991

● Junior Researcher, Japan Atomic Energy Research Institute, 1998-2001

● Ph. D. in Chemistry, Toho University, Japan, 2002

Professional Experience

● Postdoctoral Researcher, NIMS & AIST, Japan, 2002-2004

● Research & Teaching Assistant, Chukyo University, Japan, 2004-2007

● Professor, DICP, CAS, China, 2008-current

● General Secretary, MEDC, 2010-current

● Editor, Mössbauer Effect Reference and Data Journal (ISSN0163-9587)

● Vice-chairman, 8th International Symposium on the Industrial Applications of the Mössbauer Effect (ISIAME2012), Dalian, China, 2012

Awards & Honors

● Fellowship, Foundation for Cultural Heritage and Art Research, Japan, 1994-1996

● Scholarship, Heiwa Nakajima Foundation, Japan, 1997-1999

● Scholarship, Ministry of Education, Science, Sports and Culture, Japan, 1999-2000

● CAS “100 Talents” Program Recipient, 2008

● New Leadership in the Applications of the Mössbauer Spectroscopy, MEDC, 2009

● Fellowship, China-Australia Younger Scientists Exchange Program, 2012

Current Research Interests

● Mössbauer applications in chemistry & catalysis

● Development & characterization of the novel nano composite materials

Selected Publications (2007-present)

[1] J. Yin, J. Wang, et al., Iodine Ion Mediated Formation of Monomorphic Single-Crystalline Platinum Nanoflowers, Chem. Mater. 24 (2012) 2645–2654.

[2] J. Yin, J. Wang, et al., Monomorphic Platinum Octapod and Tripod Nanocrystals Synthesized by an Iron Nitrate Modified Polyol Process, Chem. Commun. 47 (2011)11966-11968.

[3] K. Zhao, J. Wang, et al., Highly Active and Sintering-resistant Au/FeOx-hydroxyapatite Catalyst for CO Oxidation, Chem. Comm. 47 (2011) 1779-1781.

[4] Y. Zhang, J. Wang, et al., Novel Ca-doped CePO4 Supported Ruthenium Catalyst with Superior Catalytic Performance for Aerobic Oxidation of Alcohols, Chem. Comm. 47 (2011) 5307-5309.

[5] Y. Zhang, J. Wang, et al., Enhanced Catalytic Activities and Characterization of Ruthenium-Grafted Halogenous Hydroxyapatite Nano-Rod Crystallites, J. Phys. Chem. C114 (2010) 16443-16450.

[6] K. Liu, J. Wang, et al., Quasi in Situ 57Fe Mössbauer Spectroscopic Study: Quantitative Correlation Between Fe2+ and H2 Concentration for PROX over Ir-Fe/SiO2 Catalyst, J. Phys. Chem. C114 (2010) 8533-8541.

 

 

 

 

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