| Mg掺杂In2O3-x催化剂光热催化CO2加氢 | |
| Photothermal catalytic CO2 hydrogenation over a Mg-doped In2O3-x catalyst | |
| 摘要: 为提高光热催化CO2加氢In2O3催化剂的催化活性，采用均相水热法制备Mg (OH)2-In (OH)3前驱体，通过高温煅烧和H2-还原处理得到了富含氧空位的Mg掺杂In2O3-x(Mg-In2O3-x)催化剂。在300℃、常压、可见光照射条件下，CO2加氢转化为CO的CO2转化率可达31.20%，CO产生速率为14.22 mmol·gcat-1·h-1，CO选择性为100%。相比于单一In2O3-x催化剂，Mg-In2O3-x催化剂光热催化CO2转化率及CO产生速率明显提高，这归因于Mg成功掺杂到In2O3晶格中，促进In2O3表面氧空位的形成，进而对可见光响应效率大幅提高，并有效减缓光生电子-空穴的复合。 | |
| 关键词: 氧化铟 光热催化 CO2加氢 掺杂 氧空位 | |
| 基金项目: 国家自然科学基金（No.51674194）和陕西省自然科学基础研究计划一般项目-青年项目（No.2022JQ-111）资助。 | |
| Abstract: To improve the catalytic activity of the photothermal CO2 hydrogenation In2O3 catalyst, a Mg(OH)2-In(OH)3 precursor was prepared by the homogeneous hydrothermal method, and a Mgdoped In2O3-x (Mg-In2O3-x) catalyst enriched with oxygen vacancies was obtained by the following high-temperature calcination and H2-reducing treatment. The catalyst was evaluated for its photothermal catalytic performance of CO2 hydrogenation in a photothermal fixed-bed reactor. The results demonstrated that Mg-In2O3-x achieved an impressive CO2 conversion rate of 31.20% with a CO production rate of 14.22 mmol·gcat-1·h-1 and selectivity of 100% in the light reaction at 300℃. The characterization results confirmed that the Mg doping into the In2O3 lattice promotes the formation of more surface oxygen vacancies, which dramatically increases the response efficiency to visible light and slows down the recombination of photogenerated electron-hole. This is the main reason for the enhancement of the photothermal catalytic performance. | |
| Keywords: indium oxide photothermal catalysis CO2 hydrogenation doping oxygen vacancy | |
| 投稿时间：2023-11-04 修订日期：2024-01-19 | |
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| 李纹龙,贾忻宇,凌洁,马梦丹,周安宁.Mg掺杂In2O3-x催化剂光热催化CO2加氢[J].无机化学学报,2024,40(5):919-929. | |
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