Nanoscale Infrared Spectroscopy and Imaging of Catalytic Reactions in Cu2O Crystals

被引：17
作者：
Ni, G. X. [2 ]
Chen, S. [1 ]
Sunku, S. S. [2 ,3 ]
Sternbach, A. [2 ]
McLeod, A. S. [2 ]
Xiong, L. [2 ]
Fogler, M. M. [4 ]
Chen, G. [1 ]
Basov, D. N. [2 ]
机构：
[1] Honda Res Inst USA Inc, San Jose, CA 95134 USA
[2] Columbia Univ, Dept Phys, New York, NY 10027 USA
[3] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA
[4] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
来源：
ACS PHOTONICS | 2020年 / 7卷 / 03期
关键词：
CO2; reduction; Cu2O catalysis; scanning nano-optical imaging; infrared nanospectroscopy; s-SNOM; CARBON-DIOXIDE; ELECTROCATALYTIC REDUCTION; OXIDATION-STATE; CO2; NANOPARTICLES; CONVERSION; ELECTROREDUCTION;
D O I：
10.1021/acsphotonics.9b01704
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Many of the existing electrochemical catalysts suffer from poor selectivity, instability, and low exchange current densities. These shortcomings call for a comprehensive exploration of the catalytic processes at the fundamental nanometer length scale levels. Here we exploit infrared (IR) nanoimaging and nanospectroscopy to directly visualize catalytic reactions on the surface of Cu2O polyhedral single crystals with nanoscale spatial resolution. Nano-IR data revealed signatures of this common catalyst after electrochemical reduction of carbon dioxides (CO2). We discuss the utility of nano-IR methods for surface/facet engineering of efficient electrochemical catalysts.
引用
收藏
页码：576 / 580
页数：5
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