催化作用
法拉第效率
电化学
碳纤维
铜
氧化还原
材料科学
密度泛函理论
无机化学
解吸
化学工程
纳米材料
兴奋剂
化学
纳米技术
物理化学
电极
计算化学
吸附
有机化学
冶金
复合材料
光电子学
复合数
工程类
作者
Xingpu Wang,Shaosong Ding,Xiaochen Feng,Ying Zhu
标识
DOI:10.1016/j.jcis.2023.09.079
摘要
Cu-based nanomaterials is crucial for electrochemical CO2 reduction reaction (CO2RR), but they inevitably undergo performance degradation due to structural self-reconstruction at a large current density during CO2RR. Here, we developed a pre-synthetic atomically dispersed Cu source strategy to fabricate a catalyst of stable Cu clusters anchored on N-doped carbon nanosheets (c-Cu/NC), which exhibited an exceptional electroreduction for CO2 to HCOOH with a Faradaic efficiency of up to 96.2 % at current density of 276.4 mA cm−2 at −0.96 V vs. RHE, which surpasses most reported catalysts. Especially, there was no any decay in stability during a 100 h continuous test, attributed to a strong interaction of Cu-C for restraining its self-reconstruction during CO2RR. DFT calculations indicated that N-doped carbon can strongly stabilize Cu clusters for keeping stability and cause the downshift of d-band center of Cu on c-Cu/NC for reducing the desorption energy between c-Cu/NC and OCHO* intermediates. This work provides an effective way to construct stable Cu clusters catalysts, and unveil the origin of catalytic mechanism over Cu clusters anchored on N-doped carbon towards electrochemical conversion of CO2 to HCOOH.
科研通智能强力驱动
Strongly Powered by AbleSci AI