Correlating the crystal structure and facet of indium oxides with their activities for CO_(2)electroreduction  

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

机构地区：[1]School of Materials Science and Engineering,Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education,Tianjin University,Tianjin 300072,China [2]School of Materials Science and Energy Engineering,Foshan University,Foshan 528000,China [3]State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China [4]Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Binhai New City,Fuzhou 350207,China

出　　处：《Fundamental Research》2024年第3期635-641,共7页自然科学基础研究（英文版）

基　　金：supported by grants from the National Natural Science Foundation of China(52001227,52122107,51972224and21802037).

摘　　要：Constructing structure-function relationships is critical for the rational design and development of efficient catalysts for CO_(2) electroreduction reaction(CO_(2)RR).In_(2)O_(3) is well-known for its specific ability to produce formic acid.However,how the crystal phase and surface affect the CO_(2)RR activity is still unclear,making it difficult to further improve the intrinsic activity and screen for the most active structure.In this work,cubic and hexagonal In_(2)O_(3) with different stable surfaces((111)and(110)for cubic,(120)and(104)for hexagonal)are investigated for CO_(2)RR.Theoretical results demonstrate that the adsorption of reactants on cubic In_(2)O_(3) is stronger than that on hexagonal In_(2)O_(3),with the cubic(111)surface being the most active for CO_(2)RR.In experiments,synthesized cubic In_(2)O_(3) nanosheets with predominantly exposed(111)surfaces exhibited a high HCOO^(-)Faradaic efficiency(87.5%)and HCOO^(–)current density(–16.7 mA cm^(-2))at–0.9 V vs RHE.In addition,an aqueous Zn-CO_(2) battery based on a cubic In2O3 cathode was assembled.Our work correlates the phases and surfaces with the CO_(2)RR activity,and provides a fundamental understanding of the structure-function relationship of In_(2)O_(3),thereby contributing to further improvements in its CO_(2)RR activity.Moreover,the results provide a principle for the directional preparation of materials with optimal phases and surfaces for efficient electrocatalysis.

关 键 词：Structure-function relationship CO_(2)electroreduction Indium oxide REACTIONMECHANISM Catalyst design 

分 类 号：O64[理学—物理化学]