Improving the photocatalytic hydrogen evolution of UiO-67 by incorporating Ce4+-coordinated bipyridinedicarboxylate ligands

Yang An; Yuanyuan Liu; Hongtao Bian; Zeyan Wang; Peng Wang; Zhaoke Zheng; Ying Dai; Myung-Hwan Whangbo; Baibiao Huang

doi:10.1016/j.scib.2019.07.030

Improving the photocatalytic hydrogen evolution of UiO-67 by incorporating Ce⁴⁺-coordinated bipyridinedicarboxylate ligands

Sci Bull (Beijing). 2019 Oct 30;64(20):1502-1509. doi: 10.1016/j.scib.2019.07.030. Epub 2019 Jul 29.

Authors

Yang An¹, Yuanyuan Liu², Hongtao Bian³, Zeyan Wang⁴, Peng Wang⁴, Zhaoke Zheng⁴, Ying Dai⁵, Myung-Hwan Whangbo⁶, Baibiao Huang⁷

Affiliations

¹ State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China; Institute for Innovative Materials and Energy, Yangzhou University, Yangzhou 225002, China.
² State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China. Electronic address: [email protected].
³ Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Xi'an 710119, China.
⁴ State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.
⁵ School of Physics, Shandong University, Jinan 250100, China.
⁶ State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China; Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA; State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter (FJIRSM), Chinese Academy of Sciences, Fuzhou 350002, China.
⁷ State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China. Electronic address: [email protected].

PMID: 36659558
DOI: 10.1016/j.scib.2019.07.030

Abstract

UiO-67 is a Zr-based metal-organic framework (MOF) containing an organic linker namely, the dianion of biphenyl-4,4'-dicarboxylic acid (bpdc). Ce⁴⁺ metal ions (0.02 Ce to Zr atom ratio) were incorporated into UiO-67 via partially replacing bpdc with the dianion of 2,2'-bipyridine-5,5'-dicarboxylic acid (bpydc); thus, the latter forms a bpydc-Ce complex. The resulting product (i.e., UiO-67-Ce) demonstrated a photocatalytic hydrogen evolution rate that was over 10 times higher than that of UiO-67. Through this modification, a new energy transfer channel is opened up. The energy transfer between the bpdc and bpydc-Ce ligands (i.e., from excited bpdc to bpydc-Ce) weakened the recombination of the charge carriers, which was confirmed by photoluminescence, emission lifetime, and transient absorption measurements. This study presents a new way to construct highly efficient MOF photocatalysts.

Keywords: Bipyridine-tetravalent cerium; Energy transfer; MOFs; Photocatalytic hydrogen evolution; UiO-67.