当前位置: X-MOL 学术Small › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Activating Inert Perovskite Oxides for CO2 Electroreduction via Slight Cu2+ Doping in B-Sites
Small ( IF 13.0 ) Pub Date : 2024-05-07 , DOI: 10.1002/smll.202402823
Yuxi Li 1 , Yu Zhang 2 , Lei Shi 3 , Xiangjian Liu 2 , Zhenbao Zhang 4 , Minghao Xie 5 , Yuming Dong 1 , Heqing Jiang 2 , Yongfa Zhu 6 , Jiawei Zhu 1, 2
Affiliation  

Perovskite oxides are proven as a striking platform for developing high-performance electrocatalysts. Nonetheless, a significant portion of them show CO2 electroreduction (CO2RR) inertness. Here a simple but effective strategy is reported to activate inert perovskite oxides (e.g., SrTiO3) for CO2RR through slight Cu2+ doping in B-sites. For the proof-of-concept catalysts of SrTi1−xCuxO3 (x = 0.025, 0.05, and 0.1), Cu2+ doping (even in trace amount, e.g., x = 0.025) can not only create active, stable CuO6 octahedra, increase electrochemical active surface area, and accelerate charge transfer, but also significantly regulate the electronic structure (e.g., up-shifted band center) to promote activation/adsorption of reaction intermediates. Benefiting from these merits, the stable SrTi1−xCuxO3 catalysts feature great improvements (at least an order of magnitude) in CO2RR activity and selectivity for high-order products (i.e., CH4 and C2+), compared to the SrTiO3 parent. This work provides a new avenue for the conversion of inert perovskite oxides into high-performance electrocatalysts toward CO2RR.

中文翻译:


通过 B 位点少量 Cu2+ 掺杂激活惰性钙钛矿氧化物进行 CO2 电还原



钙钛矿氧化物被证明是开发高性能电催化剂的一个引人注目的平台。尽管如此,其中很大一部分表现出CO 2电还原(CO 2 RR)惰性。这里报道了一种简单但有效的策略,通过在B位点轻微掺杂Cu 2+来激活惰性钙钛矿氧化物(例如SrTiO 3 )以实现CO 2 RR。对于SrTi 1−x Cu x O 3 (x = 0.025、0.05和0.1)的概念验证催化剂,Cu 2+掺杂(即使是微量,例如x = 0.025)不仅可以产生活性,稳定的CuO 6八面体,增加电化学活性表面积,加速电荷转移,而且还显着调节电子结构(例如上移能带中心)以促进反应中间体的活化/吸附。受益于这些优点,稳定的SrTi 1−x Cu x O 3催化剂在CO 2 RR活性和高阶产物(即CH 4和C 2+ )选择性方面有了很大的改进(至少一个数量级),与 SrTiO 3母体相比。这项工作为将惰性钙钛矿氧化物转化为高性能CO 2 RR电催化剂提供了新途径。
更新日期:2024-05-07
down
wechat
bug