MOF-Transformed In2O3-x @C Nanocorn Electrocatalyst for Efficient CO2 Reduction to HCOOH
Abstract For electrochemical CO2 reduction to HCOOH, an ongoing challenge is to design energy efficient electrocatalysts that can deliver a high HCOOH current density (J HCOOH) at a low overpotential. Indium oxide is good HCOOH production catalyst but with low conductivity. In this work, we report a...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-08-01
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| Series: | Nano-Micro Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40820-022-00913-6 |
| _version_ | 1798038796650938368 |
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| author | Chen Qiu Kun Qian Jun Yu Mingzi Sun Shoufu Cao Jinqiang Gao Rongxing Yu Lingzhe Fang Youwei Yao Xiaoqing Lu Tao Li Bolong Huang Shihe Yang |
| author_facet | Chen Qiu Kun Qian Jun Yu Mingzi Sun Shoufu Cao Jinqiang Gao Rongxing Yu Lingzhe Fang Youwei Yao Xiaoqing Lu Tao Li Bolong Huang Shihe Yang |
| author_sort | Chen Qiu |
| collection | DOAJ |
| description | Abstract For electrochemical CO2 reduction to HCOOH, an ongoing challenge is to design energy efficient electrocatalysts that can deliver a high HCOOH current density (J HCOOH) at a low overpotential. Indium oxide is good HCOOH production catalyst but with low conductivity. In this work, we report a unique corn design of In2O3-x @C nanocatalyst, wherein In2O3-x nanocube as the fine grains dispersed uniformly on the carbon nanorod cob, resulting in the enhanced conductivity. Excellent performance is achieved with 84% Faradaic efficiency (FE) and 11 mA cm−2 J HCOOH at a low potential of − 0.4 V versus RHE. At the current density of 100 mA cm−2, the applied potential remained stable for more than 120 h with the FE above 90%. Density functional theory calculations reveal that the abundant oxygen vacancy in In2O3-x has exposed more In3+ sites with activated electroactivity, which facilitates the formation of HCOO* intermediate. Operando X-ray absorption spectroscopy also confirms In3+ as the active site and the key intermediate of HCOO* during the process of CO 2 reduction to HCOOH. |
| first_indexed | 2024-04-11T21:45:15Z |
| format | Article |
| id | doaj.art-cf73875714bd40db91fcb375a843d40e |
| institution | Directory Open Access Journal |
| issn | 2311-6706 2150-5551 |
| language | English |
| last_indexed | 2024-04-11T21:45:15Z |
| publishDate | 2022-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nano-Micro Letters |
| spelling | doaj.art-cf73875714bd40db91fcb375a843d40e2022-12-22T04:01:26ZengSpringerOpenNano-Micro Letters2311-67062150-55512022-08-0114111610.1007/s40820-022-00913-6MOF-Transformed In2O3-x @C Nanocorn Electrocatalyst for Efficient CO2 Reduction to HCOOHChen Qiu0Kun Qian1Jun Yu2Mingzi Sun3Shoufu Cao4Jinqiang Gao5Rongxing Yu6Lingzhe Fang7Youwei Yao8Xiaoqing Lu9Tao Li10Bolong Huang11Shihe Yang12Guangdong Key Lab of Nano-Micro Material Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate SchoolDepartment of Chemistry and Biochemistry, Northern Illinois UniversityGuangdong Key Lab of Nano-Micro Material Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate SchoolDepartment of Applied Biology and Chemical Technology, The Hong Kong Polytechnic UniversitySchool of Materials Science and Engineering, China University of PetroleumGuangdong Key Lab of Nano-Micro Material Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate SchoolGuangdong Key Lab of Nano-Micro Material Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate SchoolDepartment of Chemistry and Biochemistry, Northern Illinois UniversityShenzhen International Graduate School, Tsinghua UniversitySchool of Materials Science and Engineering, China University of PetroleumDepartment of Chemistry and Biochemistry, Northern Illinois UniversityDepartment of Applied Biology and Chemical Technology, The Hong Kong Polytechnic UniversityGuangdong Key Lab of Nano-Micro Material Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate SchoolAbstract For electrochemical CO2 reduction to HCOOH, an ongoing challenge is to design energy efficient electrocatalysts that can deliver a high HCOOH current density (J HCOOH) at a low overpotential. Indium oxide is good HCOOH production catalyst but with low conductivity. In this work, we report a unique corn design of In2O3-x @C nanocatalyst, wherein In2O3-x nanocube as the fine grains dispersed uniformly on the carbon nanorod cob, resulting in the enhanced conductivity. Excellent performance is achieved with 84% Faradaic efficiency (FE) and 11 mA cm−2 J HCOOH at a low potential of − 0.4 V versus RHE. At the current density of 100 mA cm−2, the applied potential remained stable for more than 120 h with the FE above 90%. Density functional theory calculations reveal that the abundant oxygen vacancy in In2O3-x has exposed more In3+ sites with activated electroactivity, which facilitates the formation of HCOO* intermediate. Operando X-ray absorption spectroscopy also confirms In3+ as the active site and the key intermediate of HCOO* during the process of CO 2 reduction to HCOOH.https://doi.org/10.1007/s40820-022-00913-6CO2 reductionIndium oxideFormateCorn designActive sites |
| spellingShingle | Chen Qiu Kun Qian Jun Yu Mingzi Sun Shoufu Cao Jinqiang Gao Rongxing Yu Lingzhe Fang Youwei Yao Xiaoqing Lu Tao Li Bolong Huang Shihe Yang MOF-Transformed In2O3-x @C Nanocorn Electrocatalyst for Efficient CO2 Reduction to HCOOH Nano-Micro Letters CO2 reduction Indium oxide Formate Corn design Active sites |
| title | MOF-Transformed In2O3-x @C Nanocorn Electrocatalyst for Efficient CO2 Reduction to HCOOH |
| title_full | MOF-Transformed In2O3-x @C Nanocorn Electrocatalyst for Efficient CO2 Reduction to HCOOH |
| title_fullStr | MOF-Transformed In2O3-x @C Nanocorn Electrocatalyst for Efficient CO2 Reduction to HCOOH |
| title_full_unstemmed | MOF-Transformed In2O3-x @C Nanocorn Electrocatalyst for Efficient CO2 Reduction to HCOOH |
| title_short | MOF-Transformed In2O3-x @C Nanocorn Electrocatalyst for Efficient CO2 Reduction to HCOOH |
| title_sort | mof transformed in2o3 x c nanocorn electrocatalyst for efficient co2 reduction to hcooh |
| topic | CO2 reduction Indium oxide Formate Corn design Active sites |
| url | https://doi.org/10.1007/s40820-022-00913-6 |
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