文献类型：期刊文献

英文题名：ZIF-67-Confined Pd Single-Atom Catalysts Implanted Into Polydopamine-Modified Bamboo Microchannels for Robust Continuous-Flow Hydrogenation

作者：Yao, Sisi[1,2,4] Han, Jiawei[1] Zhang, Wenjun[1] Guo, Dengkang[1] Han, Shenjie[3] Lu, Yun[2] Li, Jingpeng[1]

第一作者：Yao, Sisi

机构：[1] Engineering Technology Research Center for Building and Decorating Materials of Bamboo State Forestry Administration, China National Bamboo Research Center, Hangzhou, 310012, China; [2] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China; [3] Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, China; [4] School of Chemistry and Chemical Engineering, Southeast University, Jiangsu, Nanjing, 211189, China

年份：2025

卷号：13

期号：11

外文期刊名：Advanced Science

收录：EI(收录号：20255019677824)

语种：英文

外文关键词：Binding energy - Catalyst activity - Conversion efficiency - Crystalline materials - Dyes - Electron transitions - Hydrogenation - Loading - Metal-Organic Frameworks - Organic pollutants - Palladium - Remediation - Synthesis (chemical) - Wastewater treatment

摘要：Developing efficient catalytic hydrogenation microreactors with minimal catalyst loading yet high active-site density for treating concentrated organic pollutants remains challenging. Herein, a facile room-temperature method is presented to stabilize Pd single-atom catalysts (SACs) within ZIF-67 crystals during their formation, aiming to fabricate an efficient, low-loading hydrogenation catalytic microreactor (Pd@Z-P/b CMR). ZIF-67 is constructed into polydopamine (PDA)-modified bamboo microchannels under flow conditions, utilizing preimmobilized Co2+ seeds in PDA. Despite an ultralow Pd loading (0.0014 wt.%), the Pd@Z-P/b CMR featuring atomically dispersed Pd─N4 sites in ZIF-67 considerably outperforms its Pd nanoparticle–loaded counterpart (Pd 0.0035 wt.%) in continuous-flow hydrogenation, demonstrating superior robustness and maximized Pd utilization with 94.3% conversion efficiency for saturated 4-nitroaniline over 10 d and 97.5% conversion efficiency for gram-level methylene blue (1.0?g L?1) over 5 d. Crucially, it exhibits consistent, high performance in real environmental water samples. The high surface area and porosity of ZIF-67 stabilize the Pd SACs, enhance dispersion, and ensure accessibility. Simultaneously, the Pd─N4 configuration facilitates electron transfer and optimizes hydrogen binding energy, dramatically boosting the catalytic activity. This work provides a novel strategy for room-temperature SAC synthesis and the effective treatment of high-concentration organic pollutants for sustainable wastewater remediation. ? 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH.