Liu Zhipeng, Liu Chang, Mao Suhua, Huang Xiaoxi
Hoffmann Institute of Advanced Materials, Postdoctoral Innovation Practice Base, Shenzhen Polytechnic, 7098 Liuxian Blvd, Nanshan District, Shenzhen518055, P. R. China.
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, P. R. China.
ACS Appl Mater Interfaces. 2023 Feb 8;15(5):7529-7537. doi: 10.1021/acsami.2c18522. Epub 2023 Jan 24.
The electrochemical carbon dioxide reduction reaction (CORR) catalyzed by Sn-based materials shows great potential for CO-to-formate conversion. The presence of tin species with different oxidation states can promote the catalytic performance, most likely due to the interfaces of metallic and oxide phases that induce a synergistic effect. Therefore, it is desirable yet challenging to synthesize a hybrid catalyst with abundant active heterogeneous interfaces. Herein, we synthesize a hybrid catalyst constructed by decorating nanosized SnS in the SnO matrix. The uniformly distributed SnS nanoparticles are first reduced to metallic tin, which assists in the generation of abundant Sn/SnO heterogeneous interfaces under the reduction process. Because of the electronic modulation at the heterogeneous interfaces, the resulting catalyst delivers a high current density of 200 mA·cm at -0.86 V vs RHE, and the performance is stable for over 20 h. This work suggests a potentially powerful interface engineering strategy for the development of high-performance electrocatalysts for the CORR.
由锡基材料催化的电化学二氧化碳还原反应（CORR）在将CO转化为甲酸盐方面显示出巨大潜力。不同氧化态锡物种的存在可以促进催化性能，这很可能是由于金属相和氧化物相的界面产生了协同效应。因此，合成具有丰富活性异质界面的混合催化剂是有必要的，但也具有挑战性。在此，我们合成了一种通过在SnO基体中修饰纳米级SnS构建的混合催化剂。均匀分布的SnS纳米颗粒首先被还原为金属锡，这有助于在还原过程中产生大量的Sn/SnO异质界面。由于异质界面处的电子调制，所得催化剂在相对于可逆氢电极（RHE）为-0.86 V时提供了200 mA·cm的高电流密度，并且性能在超过20小时内保持稳定。这项工作为开发用于CORR的高性能电催化剂提出了一种潜在强大的界面工程策略。
