TY  - JOUR
AU  - Wang, You
AU  - Ren, Jiyun
AU  - Guo, Qing
AU  - Ma, Ke
AU  - Guo, Wenjie
AU  - Cao, Fangxian
AU  - Zhang, Sai
PY  - 2025
TI  - Spatially proximate In5 and In4+1···In4 on In2O3 enable efficient dimethyl carbonate synthesis from CO2 below 100 oC
JO  - Nano Research
SN  - 1998-0124
SP  - 94907553
VL  - 18
IS  - 8
AB  - The low-temperature transformation of CO2 and CH3OH into dimethyl carbonate (DMC) represents a sustainable and low-carbon pathway for producing essential chemicals. An ideal energy-efficient catalysis necessitates a catalyst capable of facilitating interactions between the simultaneously activated CO2 and CH3OH. Herein, we designed the spatially proximate In5 and In4+1···ּIn4 sites on the In2O3 surface, enabling efficient DMC synthesis from CO2 and CH3OH below 100 °C. The In5 sites are responsible for CH3OH adsorption; while CO2 adsorbs on the In4+1···In4 pairs through interactions between its O atom with two In sites, as well as between the C atom and a lattice O atom. Furthermore, the spatial intimacy of In5 and In4+1···In4 sites, with a distance of ~ 4.7 Å, facilitate direct interaction between the adsorbed CO2 and CH3OH. By optimizing oxygen vacancies, porous In2O3 nanocubes with abundant dual-active sites achieved a DMC generation rate of 8.1 mmol·gcat−1·h−1 at 100 °C, significantly surpassing previously reported catalysts. These findings demonstrate a promising route for the energy-efficient DMC synthesis from CO2 and CH3OH.
UR  - https://doi.org/10.26599/NR.2025.94907553
DO  - 10.26599/NR.2025.94907553