Three-dimensionally ordered Macroporous perovskite sodium tantalum for robust hydrogen and hydrogen peroxide production

Lei Gan; Hao Mei; Qingzhuo Lin; Jinlan Peng; Xinfei Ji; Rongbin Zhang; Xuewen Wang

doi:10.1016/j.jcis.2022.01.036

Three-dimensionally ordered Macroporous perovskite sodium tantalum for robust hydrogen and hydrogen peroxide production

J Colloid Interface Sci. 2022 May:613:597-605. doi: 10.1016/j.jcis.2022.01.036. Epub 2022 Jan 10.

Authors

Lei Gan¹, Hao Mei², Qingzhuo Lin¹, Jinlan Peng¹, Xinfei Ji¹, Rongbin Zhang³, Xuewen Wang⁴

Affiliations

¹ Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, the College of Chemistry, Nanchang University, 999# Xuefu Road, Nanchang, 330031, China.
² School of Future Technology, Nanchang University, 999# Xuefu Road, Nanchang, 330031, China.
³ Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, the College of Chemistry, Nanchang University, 999# Xuefu Road, Nanchang, 330031, China. Electronic address: rbzhang@ncu.edu.cn.
⁴ Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, the College of Chemistry, Nanchang University, 999# Xuefu Road, Nanchang, 330031, China. Electronic address: wangxuewen@ncu.edu.cn.

PMID: 35063788
DOI: 10.1016/j.jcis.2022.01.036

Abstract

Constructing photocatalytic materials into three-dimensionally ordered macroporous (3DOM) is considered an effective strategy for improving mass transfer behaviors and shortening the electron migration path. However, this strategy is challenging for ternary semiconductors because they cannot be directly synthesized by traditional thermal decomposition methods. Ternary systems need to face the structural instability caused by the construction of macroporous morphology, which limits the application of the ordered macroporous structure. In this work, we designed a novel and efficient two-step crystal nucleation strategy for constructing a highly stable ternary ordered macroporous structure. Here, 3DOM NaTaO₃ was reported as a promising candidate. Compared with nonporous NaTaO₃, which has no catalytic activity in pure water, 807.9 and 280.1 μmol g^-1h^-1 of H₂ and H₂O₂ production rates were first achieved on the 3DOM NaTaO₃. Furthermore, the rate of photocatalytic H₂ evolution over the 3DOM NaTaO₃ improved sharply to 3.9 mmol g^-1h^-1 in methanol aqueous solution, which was 139 times that of nonporous NaTaO₃. The construction of 3DOM NaTaO₃ enables the participation of the bulk interior in photochemical reaction and provides more options for later decoration. This work opens a new door for constructing more 3DOM ternary semiconductors for catalytic reactions.

Keywords: Hydrogen; Hydrogen Peroxide; NaTaO(3); Photocatalytic; Three-dimensionally ordered macroporous material.