journal article·2020-05-21

Formation of Hexagonal PdSe2 for Electronics and Catalysis

Zhenhua Wu, Lei Lu, Xiaochong Liang, Chaochao Dun, Shicheng Yan, Erzhen Mu, Yang Liu, Zhiyu Hu

The Journal of Physical Chemistry C· Volume 124· Issue 20
Publisher page

Abstract

Palladium diselenide (PdSe 2 ), a novel but scarcely studied transition metal dichalcogenide (TMD), usually presents a pentagonal structure rather than a hexagonal one like other traditional TMDs. In this work, we successfully design and fabricate hexagonal PdSe 2 that has only been predicted in theory. PdSe 2 composed of an octahedral phase, which is one type of hexagonal phase, was prepared through a two-step method of selenizing the predeposited Pd. Interestingly, octahedral PdSe 2 with great air stability presents intrinsic nanotubes. Moreover, fine structures including octahedral–pentagonal heterostructures are also detected in these nanotubes, which offer huge opportunities beyond traditional TMDs. The experimental band gap, valence band, and work function of the as-fabricated PdSe 2 nanotubes are 0.7, 4.45, and 5.586 eV, respectively. Finally, a preliminary exploration of hexagonal PdSe 2 nanotubes related to the selector device and photoelectrochemical water splitting indicates their potential for further applications in electronics and catalysis.
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Research context

OpenAlex topics: 2D Materials and Applications · Quantum Dots Synthesis And Properties · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National Key Laboratory of Science and Technology on Micro-Nano Fabrication, Institute of Nano-Micro Energy, Department of Micro-Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

Jiangsu Key Laboratory of Artificial Functional Materials, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China

College of Physical Science, Sichuan University, Chengdu 610065, China

Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States

Funding

National Natural Science Foundation of China

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