Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China
Research Center for Carbon-Neutral Environmental & Energy Technology,Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology ofChina

利用可再生的电能将CO2还原为高附加值的化学品和燃料,对于缓解温室效应并实现碳中和具有重要的意义。开发了一种简单有效的方法制备非金属P元素掺杂的In2O3纳米颗粒,并将其用于电催化CO2还原制甲酸盐。在H型电解池中,在-1.45Vvs.RHE电位下,P掺杂的In2O3纳米催化剂的产甲酸法拉第效率达到88.2%,同时具有优异的稳定性。进一步的实验分析和理论研究表明,掺杂在In2O3晶格中的P元素显著促进了CO2分子的吸附和活化,降低了形成∗HCOO中间体的吉布斯自由能,同时加强了对∗HCOO的吸附作用,最终促进了甲酸盐的合成。阐明了非金属元素P掺杂对提升CO2还原反应性能的分子机制,同时也为其他金属氧化物基的高性能电催化剂的设计提供了一种可行的策略。

Using renewable electrical energy to convert CO2 to high-value chemicals and fuels holdssignificant importance for mitigating the greenhouse gas effect and achieving carbon neutrality. In thisresearch, we developed a simple and effective method for preparing P-doped In2O3 nanoparticles andapplied them in the electrocatalytic reduction of CO2 to formate. For example, the P-doped In2O3 cata-lyst exhibited 88.2% faradaic efficiency for formate production at -1.45 V vs. RHE in an H-type elec-trolysis cell, demonstrating excellent stability. Further experimental analysis and theoretical studies in-dicated that incorporating P elements into the In2O3 lattice significantly enhanced both the adsorptionand activation of CO2 molecules. Additionally, it reduced the Gibbs free energy for the formation of∗HCOO intermediates and strengthened the adsorption of ∗HCOO, ultimately promoting formate gen-eration. This study elucidates the inherent mechanisms of non-metallic P doping in enhancing the per-formance of CO2 reduction reactions and provides a viable strategy for the design of high-performanceelectrocatalysts based on metal oxides for future applications.

浙江省“尖兵”研发攻关计划资助项目(2023C03017);国家杰出青年科学基金资助项目(22225606);国家自然科学基金资助项目(22176029)

程芹,邓邦为,董帆.非金属P掺杂对In2O3电催化CO2还原性能的影响机制[J].能源环境保护,2024,38(3):83-90.

CHENG Qin, DENG Bangwei, DONG Fan. Effect of non-metallic P doping on electrocatalytic CO2 reduction per-formance of In2O3 catalyst[J]. Energy Environmental Protection, 2024, 38(3): 83-90.