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Biomimetic Z-scheme photocatalyst with a tandem solid-state electron flow catalyzing H_2 evolution

Yu, Weilai and Zhang, Shuai and Chen, Junxiang and Xia, Pengfei and Richter, Matthias H. and Chen, Linfeng and Xu, Wei and Jin, Jingpeng and Chen, Shengli and Peng, Tianyou (2018) Biomimetic Z-scheme photocatalyst with a tandem solid-state electron flow catalyzing H_2 evolution. Journal of Materials Chemistry A, 6 (32). pp. 15668-15674. ISSN 2050-7488. https://resolver.caltech.edu/CaltechAUTHORS:20180730-102503693

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Abstract

Similar to natural photosynthetic systems, artificial photosynthetic systems require synergistic cooperation between light harvesting, charge separation and redox catalysis. Herein, a three-dimensional (3D) hierarchical photocatalyst is designed with a novel Z-scheme two-photon excitation, defined by the complementary absorption of higher energy and lower energy photons by cadmium sulfide nanowires (CdS NWs) and cobalt–benzimidazole (Co-bIm) coordination polymers (CBPs), respectively. Without any noble-metal co-catalyst, the microscopically integrated CdS–CBP photocatalysts demonstrated dramatically enhanced photocatalytic activities of H_2 evolution, which were up to 10.6 folds higher than those of pristine CdS NWs. Structurally, the intimate interfacial contact between the 3D CdS NW scaffold and the discrete CBP microstructures benefits their strong electronic interaction and efficient charge separation. Upon simultaneous light excitation, a tandem solid-state electron flow from CdS to CBP and then from metal (Co) to ligand (bIm) precisely catalyzes the reduction of pre-activated H atoms on the bIm ligands for efficient H_2 evolution.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://dx.doi.org/10.1039/C8TA02922ADOIArticle
http://www.rsc.org/suppdata/c8/ta/c8ta02922a/c8ta02922a1.pdfPublisherSupporting Information
ORCID:
AuthorORCID
Yu, Weilai0000-0002-9420-0702
Richter, Matthias H.0000-0003-0091-2045
Chen, Shengli0000-0001-7448-8860
Peng, Tianyou0000-0002-2527-7634
Alternate Title:Biomimetic Z-scheme photocatalyst with a tandem solid-state electron flow catalyzing H2 evolution
Additional Information:© Royal Society of Chemistry 2018. Received 29th March 2018 , Accepted 29th June 2018. First published on 2nd July 2018. The present work is supported by the Natural Science Foundation of China (21573166, 21271146, 20973128, 20871096 and 21073137), the Ministry of Science and Technology of China under the National Basic Research Program (2012CB932800), the Funds for Creative Research Groups of Hubei Province (2014CFA007), Natural Science Foundation of Jiangsu Province (SBK2015020824) and Fundamental Research Funds for the Central Universities (2042014kf0228) of China. Dr K. Li from Wuhan University is thanked for performing TEM analysis. The UPS data were collected at the Molecular Materials Research Center of the Beckman Institute of the California Institute of Technology. Dr J. Mendez from Caltech is thanked for sample preparation for UPS analysis. There are no conflicts to declare.
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China21573166
National Natural Science Foundation of China21271146
National Natural Science Foundation of China20973128
National Natural Science Foundation of China20871096
National Natural Science Foundation of China21073137
Ministry of Science and Technology (China)2012CB932800
Funds for Creative Research Groups of Hubei Province2014CFA007
National Science Foundation of Jiangsu ProvinceSBK2015020824
Fundamental Research Funds for the Central Universities2042014kf0228
Issue or Number:32
Record Number:CaltechAUTHORS:20180730-102503693
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180730-102503693
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88351
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:30 Jul 2018 18:01
Last Modified:08 Oct 2019 22:23

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