A Supported Pd 2 Dual‐Atom Site Catalyst for Efficient Electrochemical CO 2 Reduction

作者：Ningqiang Zhang, Xinxin Zhang, Yikun Kang, Chenliang Ye, Rui Min Jin, Han Yan, Rui Lin, Jiarui Yang, Qian Xu, Yu Wang, Qinghua Zhang, Lin Gu, Licheng Liu, Weiyu Song, Jian Liu, Dingsheng S. Wang, Yadong Li · 发表于：Angewandte Chemie International Edition · 年份：2021 · DOI：10.1002/anie.202101559 · 被引用次数：348 · 研究领域：CO2 Reduction Techniques and Catalysts、Catalytic Processes in Materials Science、Advanced Photocatalysis Techniques

Abstract Dual‐atom site catalysts (DACs) have emerged as a new frontier in heterogeneous catalysis because the synergistic effect between adjacent metal atoms can promote their catalytic activity while maintaining the advantages of single‐atom site catalysts (SACs), like 100 % atomic utilization efficiency and excellent selectivity. Herein, a supported Pd 2 DAC was synthesized and used for electrochemical CO 2 reduction reaction (CO 2 RR) for the first time. The as‐obtained Pd 2 DAC exhibited superior CO 2 RR catalytic performance with 98.2 % CO faradic efficiency at −0.85 V vs. RHE, far exceeding that of Pd 1 SAC, and coupled with long‐term stability. The density functional theory (DFT) calculations revealed that the intrinsic reason for the superior activity of Pd 2 DAC toward CO 2 RR was the electron transfer between Pd atoms at the dimeric Pd sites. Thus, Pd 2 DAC possessed moderate adsorption strength of CO*, which was beneficial for CO production in CO 2 RR.