Correlating the crystal structure and facet of indium oxides with their activities for CO2 electroreduction

Wang, Jiajun; Wang, Guangjin; Wu, Han; Liu, Fei; Ren, Xixi; Wang, Yidu; Cao, Yanhui; Qi, Lu; Zheng, Xuerong; Han, Xiaopeng; Deng, Yida; Hu, Wenbin

doi:10.1016/j.fmre.2022.04.022

Cited by 1 publication

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“…Furthermore, the performance of the catalytic materials can be also improved by generating heterostructures or the introduction of structure defects (e.g., vacancies). These defects can modify the electronic properties of the catalyst surface, resulting in lower energy barriers [31][32][33][34]. For instance, Yang et al achieved enhanced CO 2 RR activity by generating structure defects on synthesized In/In oxide heterostructures, resulting in formate selectivities as high as 93% at −0.9 V vs. reversible hydrogen electrode (RHE) in a 0.5 M KHCO 3 solution [35].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Heterogeneous Indium Nanoparticles for Formate Production via CO2 Electroreduction

et al. 2023

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In this study, a simple and scalable method to obtain heterogeneous indium nanoparticles and carbon-supported indium nanoparticles under mild conditions is described. Physicochemical characterization by X-ray diffraction (XRD), X-ray photoelectron microscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed heterogeneous morphologies for the In nanoparticles in all cases. Apart from In0, XPS revealed the presence of oxidized In species on the carbon-supported samples, whereas these species were not observed for the unsupported samples. The best-in-class catalyst (In50/C50) exhibited a high formate Faradaic efficiency (FE) near the unit (above 97%) at −1.6 V vs. Ag/AgCl, achieving a stable current density around −10 mA·cmgeo−2, in a common H-cell. While In0 sites are the main active sites for the reaction, the presence of oxidized In species could play a role in the improved performance of the supported samples.

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