scispace - formally typeset
Search or ask a question
Institution

Tianjin University of Technology

EducationTianjin, Tianjin, China
About: Tianjin University of Technology is a education organization based out in Tianjin, Tianjin, China. It is known for research contribution in the topics: Catalysis & Graphene. The organization has 11346 authors who have published 9643 publications receiving 107736 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: The cell performance of the arieslamine organic dyes are compared, providing a comprehensive overview of arylamineorganic dyes, demonstrating the advantages/disadvantages of each class, and pointing out the field that needs to reinforce the research direction in the further application of DSCs.
Abstract: Arylamine organic dyes with donor (D), π-bridge (π) and acceptor (A) moieties for dye-sensitized solar cells (DSCs) have received great attention in the last decade because of their high molar absorption coefficient, low cost and structural variety. In the early stages, the efficiency of DSCs with arylamine organic dyes with D–π–A character was far behind that of DSCs with ruthenium(II) complexes partly due to the lack of information about the relationship between the chemical structures and the photovoltaic performance. However, exciting progress has been recently made, and power conversion efficiencies over 10% were obtained for DSCs with arylamine organic dyes. It is thus that the recent research and development in the field of arylamine organic dyes employing an iodide/triiodide redox couple or polypyridyl cobalt redox shuttles as the electrolytes for either DSCs or solid-state DSCs has been summarized. The cell performance of the arylamine organic dyes are compared, providing a comprehensive overview of arylamine organic dyes, demonstrating the advantages/disadvantages of each class, and pointing out the field that needs to reinforce the research direction in the further application of DSCs.

970 citations

Journal ArticleDOI
TL;DR: Experiments and density functional theory calculations demonstrate single-atom Co-N5 site is the dominating active center simultaneously for CO2 activation, the rapid formation of key intermediate COOH* as well as the desorption of CO.
Abstract: We develop an N-coordination strategy to design a robust CO2 reduction reaction (CO2RR) electrocatalyst with atomically dispersed Co–N5 site anchored on polymer-derived hollow N-doped porous carbon spheres. Our catalyst exhibits high selectivity for CO2RR with CO Faradaic efficiency (FECO) above 90% over a wide potential range from −0.57 to −0.88 V (the FECO exceeded 99% at −0.73 and −0.79 V). The CO current density and FECO remained nearly unchanged after electrolyzing 10 h, revealing remarkable stability. Experiments and density functional theory calculations demonstrate single-atom Co–N5 site is the dominating active center simultaneously for CO2 activation, the rapid formation of key intermediate COOH* as well as the desorption of CO.

835 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated Co-Zn oxyhydroxide electrocatalysts, and suggested that the mechanism depends on the amount of Zn2+ they contain, and found that Zn0.2Co0.8 has the optimum activity.
Abstract: The oxygen evolution reaction (OER) is a key process in electrochemical energy conversion devices. Understanding the origins of the lattice oxygen oxidation mechanism is crucial because OER catalysts operating via this mechanism could bypass certain limitations associated with those operating by the conventional adsorbate evolution mechanism. Transition metal oxyhydroxides are often considered to be the real catalytic species in a variety of OER catalysts and their low-dimensional layered structures readily allow direct formation of the O–O bond. Here, we incorporate catalytically inactive Zn2+ into CoOOH and suggest that the OER mechanism is dependent on the amount of Zn2+ in the catalyst. The inclusion of the Zn2+ ions gives rise to oxygen non-bonding states with different local configurations that depend on the quantity of Zn2+. We propose that the OER proceeds via the lattice oxygen oxidation mechanism pathway on the metal oxyhydroxides only if two neighbouring oxidized oxygens can hybridize their oxygen holes without sacrificing metal–oxygen hybridization significantly, finding that Zn0.2Co0.8OOH has the optimum activity. Oxygen evolution is one half of the overall water splitting reaction to produce hydrogen. Although this reaction is well studied, there remains debate over the particulars of the catalytic mechanism. Here, the authors investigate Co–Zn oxyhydroxide electrocatalysts, and suggest that the mechanism depends on the amount of Zn2+ they contain.

798 citations

Journal ArticleDOI
TL;DR: In this article, submicron polyvinyl alcohol (PVA) fiber mats were prepared by electrospinning of aqueous PVA solutions in 6-8% concentration.

746 citations


Authors

Showing all 11493 results

NameH-indexPapersCitations
Yongsheng Chen10746555962
Vinayak P. Dravid10381743612
Xiaoming Sun9638247153
Guoliang Li8479531122
Jun Luo7430519322
Qingwen Li7134216936
Yi Ding7130417147
Qiang Zhang71111923394
Jun Wei6856920440
Fengling Zhang6619615400
Kun Li6460117227
Qiang Liu6065220634
Xiaobin Wang6037713908
Jan Sundell5725113613
Ming Liu5667313364
Network Information
Related Institutions (5)
Tianjin University
79.9K papers, 1.2M citations

92% related

Harbin Institute of Technology
109.2K papers, 1.6M citations

92% related

South China University of Technology
69.4K papers, 1.2M citations

90% related

Nankai University
51.8K papers, 1.1M citations

89% related

Dalian University of Technology
71.9K papers, 1.1M citations

89% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202375
2022194
20211,109
20201,084
20191,089
2018849