催化作用
材料科学
电催化剂
过渡金属
氧化物
纳米颗粒
原子单位
格子(音乐)
纳米技术
电化学
金属
纳米尺度
化学工程
化学物理
物理化学
化学
冶金
电极
生物化学
物理
声学
工程类
量子力学
作者
Weihong Song,Kun He,Chenghang Li,Ruonan Yin,Yaqing Guo,Anmin Nie,Yanshuai Li,Keqin Yang,Mengting Zhou,Xiaoju Lin,Zhengjun Wang,Qingqing Ren,Shaojun Zhu,Ting Xu,Suya Liu,Huile Jin,Jingjing Lv,Shun Wang,Yifei Yuan
标识
DOI:10.1002/adma.202312566
摘要
Transition metal oxides (TMOs) are widely studied for loading of various catalysts due to their low cost and high structure flexibility. However, the prevailing close-packed nature of most TMOs crystals has restricted the available loading sites to surface only, while their internal bulk lattice remains unactuated due to the inaccessible narrow space that blocks out most key reactants and/or particulate catalysts. Herein, using tunnel-structured MnO2, we demonstrate how TMO's internal lattice space can be activated as extra loading sites for atomic Ag in addition to the conventional surface-only loading, via which a dual-form Ag catalyst within MnO2 skeleton is established. In this design, not only faceted Ag nanoparticles are confined onto MnO2 surface by coherent lattice-sharing, Ag atomic strings are also seeded deep into the sub-nanoscale MnO2 tunnel lattice, enriching the catalytically active sites. Tested for electrochemical CO2 reduction reaction (eCO2RR), such dual-form catalyst exhibits a high Faradaic efficiency (94%), yield (67.3 mol/g/h) and durability (∼ 48 h) for CO production, exceeding commercial Ag nanoparticles and most Ag-based electrocatalysts. Theoretical calculations further reveal the concurrent effect of such dual-form catalyst featuring facet-dependent eCO2RR for Ag nanoparticles and lattice-confined eCO2RR for Ag atomic strings, inspiring the future design of catalyst-substrate configuration. This article is protected by copyright. All rights reserved.
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