Ni-Zn O@NC催化剂将CO2高效电催化还原为COOA
Ni-ZnO@NC catalyst for highly efficient electrocatalytic reduction of CO2 to CO
电催化CO2 还原为CO是达到碳中和的潜在策略.为了解决电催化剂活性低和耐久性不足的问题,探索了一种活性位点工程和孔限制效应双尺度设计策略.通过将活性中心Ni-ZnO纳米颗粒植入NC载体的纳米孔中(Ni-ZnO@NC),构建双金属异质界面来调节电子构型,电子密度重构有利于*COOH的吸附和*CO的脱附,进而提高CO选择性并抑制H2 的生成.此外,孔限制效应将双金属纳米颗粒限制在纳米孔中,阻止了纳米颗粒在CO2 还原反应(CO2 reduction reaction,CO2RR)过程中的分离和团聚,以提高稳定性.结果表明,Ni-ZnO@NC在−0.72 V(vs.RHE)可逆氢电极表现出出色CO选择性,为(95.0±3.0)%,并且在 70 h内稳定性良好.该研究为高活性、高稳定性电催化剂的设计提供了一种实用思路.
Electrocatalytic reduction of CO2 to CO is a potential strategy for achieving carbon neutrality.To address the issues of low activity and insufficient durability of electrocatalysts,we explored a dual-scale design strategy of active site engineering and pore constriction effect.By implanting non-noble metal active centers of Ni-ZnO nanoparticles into the nanopores of NC carriers(Ni-ZnO@NC),a bimetallic heterointerface was constructed to regulate the electronic configuration.The electron density reconstruction was beneficial for the adsorption of *COOH and the desorption of *CO,thereby enhancing CO selectivity and suppressing H2 generation.Additionally,the pore constriction effect confined the bimetallic nanoparticles within the nanopores,preventing the separation and agglomeration of nanoparticles during the CO2 reduction reaction process to improve stability.The results showed that Ni-ZnO@NC exhibited an excellent CO selectivity of(95.0±3.0)%at −0.72 V(vs.RHE),and maintained good stability for 70 h.This study provides a practical approach for the design of high-activity and high-stability electrocatalysts.
袁世雄;李亮
上海理工大学 环境与建筑学院,上海 200093上海理工大学 环境与建筑学院,上海 200093
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电催化CO2还原异质界面孔限制效应双金属纳米颗粒
electrocatalytic CO2 reductionheterointerfacepore constriction effectbimetallic nanoparticles
《有色金属材料与工程》 2026 (1)
1-8,8
国家自然科学基金资助项目(22476107)
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