ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
1/1
2 files

Linker Deficiency, Aromatic Ring Fusion and Electrocatalysis in a Porous Ni8 Pyrazolate Network

preprint
submitted on 11.10.2020 and posted on 12.10.2020 by Jieying Hu, Xiangling Deng, Hu Zhang, Yingxue Diao, Shengxian Cheng, Sai-Li Zheng, Wei-Ming Liao, Jun He, Zhengtao Xu
The cruciform linker molecule here features two designer functions: the pyrazole donors for framework construction, and the vicinal alkynyl units for benzannulation to form nanographene units into the Ni8-pyrazolate scaffold. Unlike the full 12 connections of the Ni8(OH)4(H2O)2 clusters in other Ni8-pyrazolate networks, significant linker deficiency was observed here, leaving about half of the Ni(II) sites capped by acetate ligands, which can be potentially removed to open the metal sites for reactivity. The crystalline Ni8-pyrazolate scaffold also retains the crystalline order even after thermal treatments (up to 300 °C) that served to partially graphitizes the neighboring alkyne units. The resultant nanographene components enhance the electroactive properties of the porous hosts, achieving hydrogen evolution reaction (HER) activity that rivals topical nickel/palladium-enabled materials.

Funding

Design and Synthesis of High Proton Conducting Superacid Framework Materials

National Natural Science Foundation of China

Find out more...

Design and Synthesis of Conductive Coordination Polymer Ultrathin Nanosheets Based on Large π Conjugated Ligands

National Natural Science Foundation of China

Find out more...

Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01Z032)

Science and Technology Planning Project of Guangdong Province (2017A050506051)

Science and Technology Program of Guangzhou (201807010026)

Research Grants Council of HKSAR (CityU 11306018)

SRG grant of City University of Hong Kong (Project 7004820)

History

Email Address of Submitting Author

zhengtao@cityu.edu.hk

Institution

Guangdong University of Technology

Country

China

ORCID For Submitting Author

0000-0002-7408-4951

Declaration of Conflict of Interest

no conflict of interest

Exports

Logo branding

Exports